{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-05-25T20:19:55.582Z"},"system":{"slug":"los-angeles-ladwp-2024","name":"Los Angeles LADWP","state":"CA","year":2023,"url":"https://www.thewatermap.com/water/ca/los-angeles-ladwp/2023","apiUrl":"https://www.thewatermap.com/api/water/ca/los-angeles-ladwp/2023","markdownUrl":"https://www.thewatermap.com/water/ca/los-angeles-ladwp/2023/llms.txt","coordinates":{"latitude":34.0536909,"longitude":-118.242766},"contaminantsMeasured":33,"contaminantsWithFederalLimit":14,"contaminantsAtOrAboveLimit":0,"contaminantsApproachingLimit":0,"source":{"type":"Consumer Confidence Report (CCR)","description":"Figures are transcribed from the water utility's own annual Consumer Confidence Report, cross-checked by a second model, and approved by a person before publishing."},"families":[{"family":"disinfectant","familyLabel":"Disinfectants","contaminants":[{"analyteId":"chlorine","name":"Chlorine","family":"disinfectant","familyLabel":"Disinfectants","casrn":null,"whatItIs":"A disinfectant added to drinking water to kill bacteria and viruses.","whyItMatters":"Effective and necessary, but high residual levels can cause taste and odor issues; the EPA caps the residual disinfectant level.","measured":{"value":1.9,"low":null,"high":null,"kind":"point","display":"1.9","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"1.9 (a)"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":2,"low":1.7,"high":2,"kind":"range","display":"1.7–2","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"1.7 - 2"},{"value":1.9,"low":null,"high":null,"kind":"point","display":"1.9","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"1.9 (a)"}]}]},{"family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","contaminants":[{"analyteId":"bromate","name":"Bromate","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":"15541-45-4","whatItIs":"A disinfection byproduct formed when bromide-containing water is treated with ozone.","whyItMatters":"Classified as a probable human carcinogen; the EPA sets a strict maximum contaminant level.","measured":{"value":3.1,"low":null,"high":null,"kind":"point","display":"3.1","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","censored":false,"detectionLimit":null,"rawVerbatim":"3.1"},"federalStandard":{"type":"MCL","value":10,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"ug/L","average":{"value":2,"display":"2"},"range":{"low":0,"high":9.2,"display":"0–9.2"},"ratio":0.9199999999999999},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"ug/L","average":{"value":3.1,"display":"3.1"},"range":{"low":0,"high":5.4,"display":"0–5.4"},"ratio":0.54},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":2,"display":"0–2"},"ratio":0.2},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":1.6,"display":"0–1.6"},"ratio":0.16},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":1.4,"display":"0–1.4"},"ratio":0.13999999999999999},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":5.4,"low":0,"high":5.4,"kind":"range","display":"0–5.4","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<1-5.4"},{"value":1.6,"low":0,"high":1.6,"kind":"range","display":"0–1.6","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<1-1.6"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<1"},{"value":2,"low":0,"high":2,"kind":"range","display":"0–2","units":"ug/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<1-2"},{"value":9.2,"low":0,"high":9.2,"kind":"range","display":"0–9.2","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<1-9.2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<1"},{"value":3.1,"low":null,"high":null,"kind":"point","display":"3.1","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"3.1"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"2"},{"value":1.4,"low":0,"high":1.4,"kind":"range","display":"0–1.4","units":"ug/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<1-1.4"}]},{"analyteId":"chlorate","name":"Chlorate","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":"14866-68-3","whatItIs":"A byproduct that can form during disinfection, especially when hypochlorite solutions degrade.","whyItMatters":"Has no enforceable federal limit but is on the EPA contaminant candidate list; high levels can affect the thyroid.","measured":{"value":366,"low":null,"high":null,"kind":"point","display":"366","units":null,"statisticType":"average","samplingContext":"plant:Southern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"366"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"","average":{"value":366,"display":"366"},"range":{"low":21,"high":820,"display":"21–820"},"ratio":null},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"","average":{"value":80,"display":"80"},"range":{"low":null,"high":null,"display":"80"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"","average":{"value":77,"display":"77"},"range":{"low":null,"high":null,"display":"77"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"","average":{"value":71,"display":"71"},"range":{"low":null,"high":null,"display":"71"},"ratio":null}],"measurements":[{"value":80,"low":null,"high":null,"kind":"point","display":"80","units":null,"statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"80"},{"value":820,"low":21,"high":820,"kind":"range","display":"21–820","units":null,"statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"21-820"},{"value":71,"low":null,"high":null,"kind":"point","display":"71","units":null,"statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"71"},{"value":77,"low":null,"high":null,"kind":"point","display":"77","units":null,"statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"77"},{"value":366,"low":null,"high":null,"kind":"point","display":"366","units":null,"statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"366"},{"value":77,"low":null,"high":null,"kind":"point","display":"77","units":null,"statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"77"},{"value":80,"low":null,"high":null,"kind":"point","display":"80","units":null,"statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"80"},{"value":71,"low":null,"high":null,"kind":"point","display":"71","units":null,"statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"71"}]},{"analyteId":"haa5","name":"HAA5","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":null,"whatItIs":"Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.","whyItMatters":"Long-term exposure above the federal limit is associated with an increased cancer risk.","measured":{"value":14.9,"low":null,"high":null,"kind":"point","display":"14.9","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"14.9 (f)"},"federalStandard":{"type":"MCL","value":60,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":14.9,"low":null,"high":null,"kind":"point","display":"14.9","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"14.9 (f)"},{"value":16.3,"low":3.6,"high":16.3,"kind":"range","display":"3.6–16.3","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"3.6 - 16.3"}]},{"analyteId":"ndba","name":"N-Nitrosodi-n-butylamine","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":"924-16-3","whatItIs":null,"whyItMatters":null,"measured":{"value":2.5,"low":null,"high":null,"kind":"point","display":"2.5","units":"ng/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","censored":false,"detectionLimit":null,"rawVerbatim":"2.5"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"ng/L","average":{"value":2.5,"display":"2.5"},"range":{"low":null,"high":null,"display":"2.5"},"ratio":null},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":null}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<2"},{"value":2.5,"low":null,"high":null,"kind":"point","display":"2.5","units":"ng/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"2.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<2"},{"value":2.5,"low":null,"high":null,"kind":"point","display":"2.5","units":"ng/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"2.5"}]},{"analyteId":"tthm","name":"TTHM","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":null,"whatItIs":"Total trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter.","whyItMatters":"Long-term exposure above the federal limit is linked to liver, kidney, and central-nervous-system effects and increased cancer risk.","measured":{"value":34.4,"low":null,"high":null,"kind":"point","display":"34.4","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"HLRAA = 34.4 (f)"},"federalStandard":{"type":"MCL","value":80,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":34.4,"low":null,"high":null,"kind":"point","display":"34.4","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"HLRAA = 34.4 (f)"},{"value":35.8,"low":13.9,"high":35.8,"kind":"range","display":"13.9–35.8","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"13.9 - 35.8"}]}]},{"family":"inorganic","familyLabel":"Inorganic chemicals","contaminants":[{"analyteId":"bromide","name":"Bromide","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":"24959-67-9","whatItIs":"A naturally occurring salt found in source water.","whyItMatters":"Not directly regulated, but a precursor that increases formation of brominated disinfection byproducts.","measured":{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:Northern Combined Wells","censored":true,"detectionLimit":0.02,"rawVerbatim":"<0.02"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":0.1,"display":"0–0.1"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":0.1,"display":"0–0.1"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":0.1,"display":"0–0.1"},"ratio":null}],"measurements":[{"value":0.1,"low":0,"high":0.1,"kind":"range","display":"0–0.1","units":null,"statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.02-0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<0.02"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<0.02"},{"value":0.1,"low":0,"high":0.1,"kind":"range","display":"0–0.1","units":null,"statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<0.02-0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.02"},{"value":0.1,"low":0,"high":0.1,"kind":"range","display":"0–0.1","units":null,"statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<0.02-0.1"}]},{"analyteId":"fluoride","name":"Fluoride","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":"16984-48-8","whatItIs":"A mineral often added to drinking water to help prevent tooth decay.","whyItMatters":"Beneficial at low levels, but long-term exposure above the federal limit can cause bone disease and tooth mottling.","measured":{"value":0.8,"low":null,"high":null,"kind":"point","display":"0.8","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","censored":false,"detectionLimit":null,"rawVerbatim":"0.8"},"federalStandard":{"type":"MCL","value":2,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":0.8,"display":"0.8"},"range":{"low":0.7,"high":0.9,"display":"0.7–0.9"},"ratio":0.45},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":0.7,"display":"0.7"},"range":{"low":0.7,"high":0.8,"display":"0.7–0.8"},"ratio":0.4},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":0.8,"display":"0.8"},"range":{"low":0.7,"high":0.8,"display":"0.7–0.8"},"ratio":0.4},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":0.7,"display":"0.7"},"range":{"low":0.6,"high":0.8,"display":"0.6–0.8"},"ratio":0.4},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":0.7,"display":"0.7"},"range":{"low":0.6,"high":0.8,"display":"0.6–0.8"},"ratio":0.4},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":0.7,"display":"0.7"},"range":{"low":0.3,"high":0.8,"display":"0.3–0.8"},"ratio":0.4}],"measurements":[{"value":0.8,"low":0.7,"high":0.8,"kind":"range","display":"0.7–0.8","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"0.7 - 0.8"},{"value":0.9,"low":0.7,"high":0.9,"kind":"range","display":"0.7–0.9","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"0.7 - 0.9"},{"value":0.8,"low":0.7,"high":0.8,"kind":"range","display":"0.7–0.8","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"0.7 - 0.8"},{"value":0.8,"low":null,"high":null,"kind":"point","display":"0.8","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"0.8"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"0.7"},{"value":1,"low":0.3,"high":1,"kind":"range","display":"0.3–1","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.3 - 1"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"0.7"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"0.7"},{"value":0.8,"low":0.3,"high":0.8,"kind":"range","display":"0.3–0.8","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"0.3-0.8"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"0.7"},{"value":0.8,"low":0.6,"high":0.8,"kind":"range","display":"0.6–0.8","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"0.6-0.8"},{"value":0.8,"low":0.6,"high":0.8,"kind":"range","display":"0.6–0.8","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"0.6-0.8"},{"value":0.8,"low":null,"high":null,"kind":"point","display":"0.8","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"0.8"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"0.7"}]},{"analyteId":"nitrate","name":"Nitrate","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":"14797-55-8","whatItIs":"A compound from fertilizer runoff, septic systems, and erosion of natural deposits.","whyItMatters":"Levels above the federal limit can cause 'blue baby syndrome,' a serious oxygen-transport condition in infants.","measured":{"value":0.5,"low":null,"high":null,"kind":"point","display":"0.5","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","censored":false,"detectionLimit":null,"rawVerbatim":"0.5"},"federalStandard":{"type":"MCL","value":10,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":0.5,"display":"0.5"},"range":{"low":0,"high":2.4,"display":"0–2.4"},"ratio":0.24},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":0.5,"display":"0.5"},"range":{"low":0,"high":1.8,"display":"0–1.8"},"ratio":0.18},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":0.5,"display":"0–0.5"},"ratio":0.05},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":0.5,"display":"0.5"},"range":{"low":null,"high":null,"display":"0.5"},"ratio":0.05},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0.5,"low":0,"high":0.5,"kind":"range","display":"0–0.5","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.4-0.5"},{"value":2.4,"low":0,"high":2.4,"kind":"range","display":"0–2.4","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<0.4-2.4"},{"value":0.5,"low":null,"high":null,"kind":"point","display":"0.5","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"0.5"},{"value":0.5,"low":null,"high":null,"kind":"point","display":"0.5","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<0.4"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.4"},{"value":0.5,"low":null,"high":null,"kind":"point","display":"0.5","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"0.5"},{"value":0.5,"low":null,"high":null,"kind":"point","display":"0.5","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<0.4"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<0.4"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<0.4"},{"value":1.8,"low":0,"high":1.8,"kind":"range","display":"0–1.8","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<0.4-1.8"}]}]},{"family":"metal","familyLabel":"Metals","contaminants":[{"analyteId":"aluminum","name":"Aluminum","family":"metal","familyLabel":"Metals","casrn":"7429-90-5","whatItIs":"A common element sometimes used as a treatment coagulant.","whyItMatters":"Regulated only as a secondary (cosmetic) standard; high levels can discolor water.","measured":{"value":93,"low":null,"high":null,"kind":"point","display":"93","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","censored":false,"detectionLimit":null,"rawVerbatim":"93 (a)"},"federalStandard":{"type":"MCL","value":1000,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"ug/L","average":{"value":93,"display":"93"},"range":{"low":0,"high":150,"display":"0–150"},"ratio":0.15},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":110,"display":"0–110"},"ratio":0.11},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"ug/L","average":{"value":62,"display":"62"},"range":{"low":52,"high":91,"display":"52–91"},"ratio":0.091},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":150,"low":0,"high":150,"kind":"range","display":"0–150","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<50-150"},{"value":91,"low":52,"high":91,"kind":"range","display":"52–91","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"52-91"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<50"},{"value":110,"low":0,"high":110,"kind":"range","display":"0–110","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<50-110"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<50"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<50 (a)"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<50"},{"value":62,"low":null,"high":null,"kind":"point","display":"62","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"62 (a)"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<50"},{"value":93,"low":null,"high":null,"kind":"point","display":"93","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"93 (a)"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<50"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<50"}]},{"analyteId":"arsenic","name":"Arsenic","family":"metal","familyLabel":"Metals","casrn":"7440-38-2","whatItIs":"A naturally occurring element that also enters water from industry and agriculture.","whyItMatters":"A known human carcinogen; long-term exposure is linked to skin, bladder, and lung cancer.","measured":{"value":3.5,"low":null,"high":null,"kind":"point","display":"3.5","units":"ug/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"3.5"},"federalStandard":{"type":"MCL","value":10,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"ug/L","average":{"value":3.5,"display":"3.5"},"range":{"low":0,"high":8.4,"display":"0–8.4"},"ratio":0.8400000000000001},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"ug/L","average":{"value":3.5,"display":"3.5"},"range":{"low":0,"high":6.3,"display":"0–6.3"},"ratio":0.63},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"ug/L","average":{"value":2.7,"display":"2.7"},"range":{"low":0,"high":4.5,"display":"0–4.5"},"ratio":0.45},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":6.3,"low":0,"high":6.3,"kind":"range","display":"0–6.3","units":"ug/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<2-6.3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<2"},{"value":3.5,"low":null,"high":null,"kind":"point","display":"3.5","units":"ug/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"3.5"},{"value":2.7,"low":null,"high":null,"kind":"point","display":"2.7","units":"ug/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"2.7"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<2"},{"value":8.4,"low":0,"high":8.4,"kind":"range","display":"0–8.4","units":"ug/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<2-8.4"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<2"},{"value":4.5,"low":0,"high":4.5,"kind":"range","display":"0–4.5","units":"ug/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<2-4.5"},{"value":3.5,"low":null,"high":null,"kind":"point","display":"3.5","units":"ug/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"3.5"}]},{"analyteId":"barium","name":"Barium","family":"metal","familyLabel":"Metals","casrn":"7440-39-3","whatItIs":"A metal from erosion of natural deposits and industrial discharge.","whyItMatters":"Long-term exposure above the federal limit can raise blood pressure.","measured":{"value":124,"low":null,"high":null,"kind":"point","display":"124","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","censored":false,"detectionLimit":null,"rawVerbatim":"124"},"federalStandard":{"type":"MCL","value":1000,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"ug/L","average":{"value":124,"display":"124"},"range":{"low":null,"high":null,"display":"124"},"ratio":0.124},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"ug/L","average":{"value":124,"display":"124"},"range":{"low":null,"high":null,"display":"124"},"ratio":0.124},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<100"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<100"},{"value":124,"low":null,"high":null,"kind":"point","display":"124","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"124"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<100"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<100"},{"value":124,"low":null,"high":null,"kind":"point","display":"124","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"124"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<100"},{"value":124,"low":null,"high":null,"kind":"point","display":"124","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"124"},{"value":124,"low":null,"high":null,"kind":"point","display":"124","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"124"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<100"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<100"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<100"}]},{"analyteId":"boron","name":"Boron","family":"metal","familyLabel":"Metals","casrn":"7440-42-8","whatItIs":"A naturally occurring element from rock and soil.","whyItMatters":"No enforceable federal limit; the EPA has issued a health advisory level.","measured":{"value":450,"low":null,"high":null,"kind":"point","display":"450","units":null,"statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","censored":false,"detectionLimit":null,"rawVerbatim":"450"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"","average":{"value":450,"display":"450"},"range":{"low":373,"high":507,"display":"373–507"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"","average":{"value":398,"display":"398"},"range":{"low":320,"high":501,"display":"320–501"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"","average":{"value":448,"display":"448"},"range":{"low":326,"high":501,"display":"326–501"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"","average":{"value":170,"display":"170"},"range":{"low":null,"high":null,"display":"170"},"ratio":null},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"","average":{"value":140,"display":"140"},"range":{"low":null,"high":null,"display":"140"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"","average":{"value":140,"display":"140"},"range":{"low":null,"high":null,"display":"140"},"ratio":null}],"measurements":[{"value":170,"low":null,"high":null,"kind":"point","display":"170","units":null,"statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"170"},{"value":140,"low":null,"high":null,"kind":"point","display":"140","units":null,"statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"140"},{"value":450,"low":null,"high":null,"kind":"point","display":"450","units":null,"statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"450"},{"value":398,"low":null,"high":null,"kind":"point","display":"398","units":null,"statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"398"},{"value":140,"low":null,"high":null,"kind":"point","display":"140","units":null,"statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"140"},{"value":170,"low":null,"high":null,"kind":"point","display":"170","units":null,"statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"170"},{"value":448,"low":null,"high":null,"kind":"point","display":"448","units":null,"statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"448"},{"value":140,"low":null,"high":null,"kind":"point","display":"140","units":null,"statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"140"},{"value":507,"low":373,"high":507,"kind":"range","display":"373–507","units":null,"statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"373-507"},{"value":501,"low":326,"high":501,"kind":"range","display":"326–501","units":null,"statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"326-501"},{"value":140,"low":null,"high":null,"kind":"point","display":"140","units":null,"statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"140"},{"value":501,"low":320,"high":501,"kind":"range","display":"320–501","units":null,"statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"320-501"}]},{"analyteId":"calcium","name":"Calcium","family":"metal","familyLabel":"Metals","casrn":"7440-70-2","whatItIs":"A naturally occurring mineral that contributes to water hardness.","whyItMatters":"Not federally regulated for health; affects scaling and taste.","measured":{"value":68,"low":null,"high":null,"kind":"point","display":"68","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","censored":false,"detectionLimit":null,"rawVerbatim":"68"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":68,"display":"68"},"range":{"low":58,"high":78,"display":"58–78"},"ratio":null},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":68,"display":"68"},"range":{"low":59,"high":76,"display":"59–76"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":41,"display":"41"},"range":{"low":30,"high":53,"display":"30–53"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":33,"display":"33"},"range":{"low":27,"high":49,"display":"27–49"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":38,"display":"38"},"range":{"low":38,"high":39,"display":"38–39"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":31,"display":"31"},"range":{"low":30,"high":32,"display":"30–32"},"ratio":null}],"measurements":[{"value":76,"low":59,"high":76,"kind":"range","display":"59–76","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"59-76"},{"value":39,"low":38,"high":39,"kind":"range","display":"38–39","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"38-39"},{"value":33,"low":null,"high":null,"kind":"point","display":"33","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"33"},{"value":78,"low":58,"high":78,"kind":"range","display":"58–78","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"58-78"},{"value":53,"low":30,"high":53,"kind":"range","display":"30–53","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"30-53"},{"value":32,"low":30,"high":32,"kind":"range","display":"30–32","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"30-32"},{"value":68,"low":null,"high":null,"kind":"point","display":"68","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"68"},{"value":38,"low":null,"high":null,"kind":"point","display":"38","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"38"},{"value":41,"low":null,"high":null,"kind":"point","display":"41","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"41"},{"value":49,"low":27,"high":49,"kind":"range","display":"27–49","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"27-49"},{"value":31,"low":null,"high":null,"kind":"point","display":"31","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"31"},{"value":68,"low":null,"high":null,"kind":"point","display":"68","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"68"}]},{"analyteId":"chromium_total","name":"Chromium, Total","family":"metal","familyLabel":"Metals","casrn":"7440-47-3","whatItIs":"Total chromium — the sum of all chromium forms, from natural deposits and industrial discharge.","whyItMatters":"Long-term exposure above the federal limit can cause allergic dermatitis; includes hexavalent chromium.","measured":{"value":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"0.2"},"federalStandard":{"type":"MCL","value":10,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0.2,"display":"0.2"},"range":{"low":0,"high":0.4,"display":"0–0.4"},"ratio":0.04},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0.1,"display":"0.1"},"range":{"low":0,"high":0.3,"display":"0–0.3"},"ratio":0.03},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0.4,"low":0,"high":0.4,"kind":"range","display":"0–0.4","units":"ug/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<0.1-0.4"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<0.1"},{"value":0.3,"low":0,"high":0.3,"kind":"range","display":"0–0.3","units":"ug/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<0.1-0.3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<0.1"},{"value":0.1,"low":null,"high":null,"kind":"point","display":"0.1","units":"ug/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<0.1"},{"value":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"0.2"}]},{"analyteId":"copper","name":"Copper","family":"metal","familyLabel":"Metals","casrn":"7440-50-8","whatItIs":"A metal that enters water from corroding household plumbing.","whyItMatters":"Short-term exposure causes stomach distress; long-term exposure can damage the liver and kidneys.","measured":{"value":90,"low":null,"high":null,"kind":"point","display":"90","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"90th Percentile value = 529"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"Number of samples exceeding AL = 0 out of 105"},{"value":90,"low":null,"high":null,"kind":"point","display":"90","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"90th Percentile value = 529"}]},{"analyteId":"lead","name":"Lead","family":"metal","familyLabel":"Metals","casrn":"7439-92-1","whatItIs":"A toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.","whyItMatters":"There is no safe level of lead; it harms brain development in children and raises blood pressure in adults. The EPA sets an action level, not a health goal above zero.","measured":{"value":90,"low":null,"high":null,"kind":"point","display":"90","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"90th Percentile value = <5"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"Number of samples exceeding AL = 3 out of 105"},{"value":90,"low":null,"high":null,"kind":"point","display":"90","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"90th Percentile value = <5"}]},{"analyteId":"lithium","name":"Lithium","family":"metal","familyLabel":"Metals","casrn":"7439-93-2","whatItIs":"A naturally occurring element found in some groundwater.","whyItMatters":"No enforceable federal limit; on the EPA contaminant candidate list for further study.","measured":{"value":88,"low":null,"high":null,"kind":"point","display":"88","units":null,"statisticType":"average","samplingContext":"plant:San Fernando Valley Los Angeles Aqueduct Filtration plant","censored":false,"detectionLimit":null,"rawVerbatim":"88"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:San Fernando Valley Los Angeles Aqueduct Filtration plant","label":"San Fernando Valley Los Angeles Aqueduct Filtration plant","kind":"plant","units":"","average":{"value":88,"display":"88"},"range":{"low":80,"high":94,"display":"80–94"},"ratio":null},{"context":"plant:Western LA Los Angeles Aqueduct Filtration plant","label":"Western LA Los Angeles Aqueduct Filtration plant","kind":"plant","units":"","average":{"value":88,"display":"88"},"range":{"low":80,"high":94,"display":"80–94"},"ratio":null},{"context":"plant:San Fernando Valley Northern Combined Wells","label":"San Fernando Valley Northern Combined Wells","kind":"plant","units":"","average":{"value":69,"display":"69"},"range":{"low":63,"high":76,"display":"63–76"},"ratio":null},{"context":"plant:Central LA Southern Combined Wells","label":"Central LA Southern Combined Wells","kind":"plant","units":"","average":{"value":69,"display":"69"},"range":{"low":63,"high":76,"display":"63–76"},"ratio":null},{"context":"zone:Harbor/Eastern LA Distribution System Sampling Locations","label":"Harbor/Eastern LA Distribution System Sampling Locations","kind":"zone","units":"","average":{"value":38,"display":"38"},"range":{"low":10,"high":57,"display":"10–57"},"ratio":null}],"measurements":[{"value":88,"low":null,"high":null,"kind":"point","display":"88","units":null,"statisticType":"average","samplingContext":"plant:San Fernando Valley Los Angeles Aqueduct Filtration plant","rawVerbatim":"88"},{"value":88,"low":null,"high":null,"kind":"point","display":"88","units":null,"statisticType":"average","samplingContext":"plant:Western LA Los Angeles Aqueduct Filtration plant","rawVerbatim":"88"},{"value":76,"low":63,"high":76,"kind":"range","display":"63–76","units":null,"statisticType":"range","samplingContext":"plant:San Fernando Valley Northern Combined Wells","rawVerbatim":"63-76"},{"value":57,"low":10,"high":57,"kind":"range","display":"10–57","units":null,"statisticType":"range","samplingContext":"zone:Harbor/Eastern LA Distribution System Sampling Locations","rawVerbatim":"10-57"},{"value":69,"low":null,"high":null,"kind":"point","display":"69","units":null,"statisticType":"average","samplingContext":"plant:Central LA Southern Combined Wells","rawVerbatim":"69"},{"value":38,"low":null,"high":null,"kind":"point","display":"38","units":null,"statisticType":"average","samplingContext":"zone:Harbor/Eastern LA Distribution System Sampling Locations","rawVerbatim":"38"},{"value":69,"low":null,"high":null,"kind":"point","display":"69","units":null,"statisticType":"average","samplingContext":"plant:San Fernando Valley Northern Combined Wells","rawVerbatim":"69"},{"value":94,"low":80,"high":94,"kind":"range","display":"80–94","units":null,"statisticType":"range","samplingContext":"plant:San Fernando Valley Los Angeles Aqueduct Filtration plant","rawVerbatim":"80-94"},{"value":94,"low":80,"high":94,"kind":"range","display":"80–94","units":null,"statisticType":"range","samplingContext":"plant:Western LA Los Angeles Aqueduct Filtration plant","rawVerbatim":"80-94"},{"value":76,"low":63,"high":76,"kind":"range","display":"63–76","units":null,"statisticType":"range","samplingContext":"plant:Central LA Southern Combined Wells","rawVerbatim":"63-76"}]},{"analyteId":"magnesium","name":"Magnesium","family":"metal","familyLabel":"Metals","casrn":"7439-95-4","whatItIs":"A naturally occurring mineral that contributes to water hardness.","whyItMatters":"Not federally regulated for health; affects scaling and taste.","measured":{"value":26,"low":null,"high":null,"kind":"point","display":"26","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","censored":false,"detectionLimit":null,"rawVerbatim":"26.0"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":26,"display":"26"},"range":{"low":23,"high":29,"display":"23–29"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":26,"display":"26"},"range":{"low":22,"high":29,"display":"22–29"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":11.1,"display":"11.1"},"range":{"low":8.3,"high":15,"display":"8.3–15"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":14,"display":"14"},"range":{"low":13,"high":14,"display":"13–14"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":8.3,"display":"8.3"},"range":{"low":6.3,"high":12.9,"display":"6.3–12.9"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":8.3,"display":"8.3"},"range":{"low":7.6,"high":9.2,"display":"7.6–9.2"},"ratio":null}],"measurements":[{"value":9.2,"low":7.6,"high":9.2,"kind":"range","display":"7.6–9.2","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"7.6-9.2"},{"value":8.3,"low":null,"high":null,"kind":"point","display":"8.3","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"8.3"},{"value":15,"low":8.3,"high":15,"kind":"range","display":"8.3–15","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"8.3-15.0"},{"value":11.1,"low":null,"high":null,"kind":"point","display":"11.1","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"11.1"},{"value":26,"low":null,"high":null,"kind":"point","display":"26","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"26.0"},{"value":26,"low":null,"high":null,"kind":"point","display":"26","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"26.0"},{"value":14,"low":null,"high":null,"kind":"point","display":"14","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"14.0"},{"value":12.9,"low":6.3,"high":12.9,"kind":"range","display":"6.3–12.9","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"6.3-12.9"},{"value":14,"low":13,"high":14,"kind":"range","display":"13–14","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"13.0-14.0"},{"value":8.3,"low":null,"high":null,"kind":"point","display":"8.3","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"8.3"},{"value":29,"low":23,"high":29,"kind":"range","display":"23–29","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"23.0-29.0"},{"value":29,"low":22,"high":29,"kind":"range","display":"22–29","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"22.0-29.0"}]},{"analyteId":"potassium","name":"Potassium","family":"metal","familyLabel":"Metals","casrn":"7440-09-7","whatItIs":"A naturally occurring mineral from rock and soil.","whyItMatters":"Not federally regulated for health.","measured":{"value":5,"low":null,"high":null,"kind":"point","display":"5","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","censored":false,"detectionLimit":null,"rawVerbatim":"5.0"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":5,"display":"5"},"range":{"low":4.6,"high":5.4,"display":"4.6–5.4"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":4.9,"display":"4.9"},"range":{"low":4.4,"high":5.4,"display":"4.4–5.4"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":4.5,"display":"4.5"},"range":{"low":3.8,"high":5.3,"display":"3.8–5.3"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":4.4,"display":"4.4"},"range":{"low":3.8,"high":5.2,"display":"3.8–5.2"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":4.6,"display":"4.6"},"range":{"low":3.8,"high":5.2,"display":"3.8–5.2"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":2.6,"display":"2.6"},"range":{"low":null,"high":null,"display":"2.6"},"ratio":null}],"measurements":[{"value":5.2,"low":3.8,"high":5.2,"kind":"range","display":"3.8–5.2","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"3.8-5.2"},{"value":4.6,"low":null,"high":null,"kind":"point","display":"4.6","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"4.6"},{"value":2.6,"low":null,"high":null,"kind":"point","display":"2.6","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"2.6"},{"value":5.4,"low":4.6,"high":5.4,"kind":"range","display":"4.6–5.4","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"4.6-5.4"},{"value":4.4,"low":null,"high":null,"kind":"point","display":"4.4","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"4.4"},{"value":5,"low":null,"high":null,"kind":"point","display":"5","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"5.0"},{"value":4.5,"low":null,"high":null,"kind":"point","display":"4.5","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"4.5"},{"value":5.2,"low":3.8,"high":5.2,"kind":"range","display":"3.8–5.2","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"3.8-5.2"},{"value":4.9,"low":null,"high":null,"kind":"point","display":"4.9","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"4.9"},{"value":5.4,"low":4.4,"high":5.4,"kind":"range","display":"4.4–5.4","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"4.4-5.4"},{"value":5.3,"low":3.8,"high":5.3,"kind":"range","display":"3.8–5.3","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"3.8-5.3"},{"value":2.6,"low":null,"high":null,"kind":"point","display":"2.6","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"2.6"}]},{"analyteId":"silica","name":"Silica","family":"metal","familyLabel":"Metals","casrn":"7631-86-9","whatItIs":"A naturally occurring compound from sand and rock.","whyItMatters":"Not federally regulated for health; relevant mainly for industrial water use.","measured":{"value":19.2,"low":null,"high":null,"kind":"point","display":"19.2","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"19.2"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":19.2,"display":"19.2"},"range":{"low":14.4,"high":21.6,"display":"14.4–21.6"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":17.7,"display":"17.7"},"range":{"low":14.1,"high":20.7,"display":"14.1–20.7"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":18.7,"display":"18.7"},"range":{"low":14.4,"high":19.8,"display":"14.4–19.8"},"ratio":null}],"measurements":[{"value":21.6,"low":14.4,"high":21.6,"kind":"range","display":"14.4–21.6","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"14.4-21.6"},{"value":17.7,"low":null,"high":null,"kind":"point","display":"17.7","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"17.7"},{"value":19.2,"low":null,"high":null,"kind":"point","display":"19.2","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"19.2"},{"value":19.8,"low":14.4,"high":19.8,"kind":"range","display":"14.4–19.8","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"14.4-19.8"},{"value":20.7,"low":14.1,"high":20.7,"kind":"range","display":"14.1–20.7","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"14.1-20.7"},{"value":18.7,"low":null,"high":null,"kind":"point","display":"18.7","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"18.7"}]},{"analyteId":"sodium","name":"Sodium","family":"metal","familyLabel":"Metals","casrn":"7440-23-5","whatItIs":"A naturally occurring salt component.","whyItMatters":"Not federally regulated for health; relevant for people on sodium-restricted diets.","measured":{"value":105,"low":null,"high":null,"kind":"point","display":"105","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","censored":false,"detectionLimit":null,"rawVerbatim":"105.0"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":105,"display":"105"},"range":{"low":93,"high":117,"display":"93–117"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":103,"display":"103"},"range":{"low":90,"high":116,"display":"90–116"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":46.5,"display":"46.5"},"range":{"low":39.7,"high":57.3,"display":"39.7–57.3"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":43.2,"display":"43.2"},"range":{"low":34.6,"high":48.5,"display":"34.6–48.5"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":42.6,"display":"42.6"},"range":{"low":37.3,"high":47.5,"display":"37.3–47.5"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":46,"display":"46"},"range":{"low":null,"high":null,"display":"46"},"ratio":null}],"measurements":[{"value":43.2,"low":null,"high":null,"kind":"point","display":"43.2","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"43.2"},{"value":46.5,"low":null,"high":null,"kind":"point","display":"46.5","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"46.5"},{"value":117,"low":93,"high":117,"kind":"range","display":"93–117","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"93.0-117.0"},{"value":57.3,"low":39.7,"high":57.3,"kind":"range","display":"39.7–57.3","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"39.7-57.3"},{"value":42.6,"low":null,"high":null,"kind":"point","display":"42.6","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"42.6"},{"value":48.5,"low":34.6,"high":48.5,"kind":"range","display":"34.6–48.5","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"34.6-48.5"},{"value":46,"low":null,"high":null,"kind":"point","display":"46","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"46.0"},{"value":103,"low":null,"high":null,"kind":"point","display":"103","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"103.0"},{"value":116,"low":90,"high":116,"kind":"range","display":"90–116","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"90.0-116.0"},{"value":47.5,"low":37.3,"high":47.5,"kind":"range","display":"37.3–47.5","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"37.3-47.5"},{"value":46,"low":null,"high":null,"kind":"point","display":"46","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"46.0"},{"value":105,"low":null,"high":null,"kind":"point","display":"105","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"105.0"}]}]},{"family":"microbial","familyLabel":"Microbial","contaminants":[{"analyteId":"total_coliform","name":"Total Coliform","family":"microbial","familyLabel":"Microbial","casrn":null,"whatItIs":"A group of bacteria used as an indicator of overall water-system sanitation.","whyItMatters":"Coliforms themselves are usually harmless, but their presence signals that disease-causing organisms could enter the system.","measured":{"value":0.6,"low":0,"high":0.6,"kind":"range","display":"0–0.6","units":"%","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"Range = 0% - 0.6% positive samples"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.6,"low":0,"high":0.6,"kind":"range","display":"0–0.6","units":"%","statisticType":"range","samplingContext":"system","rawVerbatim":"Range = 0% - 0.6% positive samples"}]}]},{"family":"physical_aggregate","familyLabel":"Physical & aggregate","contaminants":[{"analyteId":"alkalinity","name":"Alkalinity","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of the water's capacity to neutralize acids.","whyItMatters":"Not federally regulated for health; relevant to corrosion control and treatment.","measured":{"value":119,"low":null,"high":null,"kind":"point","display":"119","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"119"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":119,"display":"119"},"range":{"low":107,"high":132,"display":"107–132"},"ratio":null},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":118,"display":"118"},"range":{"low":109,"high":127,"display":"109–127"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":112,"display":"112"},"range":{"low":100,"high":124,"display":"100–124"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":114,"display":"114"},"range":{"low":105,"high":123,"display":"105–123"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":110,"display":"110"},"range":{"low":92,"high":119,"display":"92–119"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":98,"display":"98"},"range":{"low":94,"high":101,"display":"94–101"},"ratio":null}],"measurements":[{"value":98,"low":null,"high":null,"kind":"point","display":"98","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"98"},{"value":118,"low":null,"high":null,"kind":"point","display":"118","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"118"},{"value":123,"low":105,"high":123,"kind":"range","display":"105–123","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"105-123"},{"value":132,"low":107,"high":132,"kind":"range","display":"107–132","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"107-132"},{"value":119,"low":null,"high":null,"kind":"point","display":"119","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"119"},{"value":112,"low":null,"high":null,"kind":"point","display":"112","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"112"},{"value":114,"low":null,"high":null,"kind":"point","display":"114","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"114"},{"value":101,"low":94,"high":101,"kind":"range","display":"94–101","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"94-101"},{"value":124,"low":100,"high":124,"kind":"range","display":"100–124","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"100-124"},{"value":110,"low":null,"high":null,"kind":"point","display":"110","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"110"},{"value":119,"low":92,"high":119,"kind":"range","display":"92–119","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"92-119"},{"value":127,"low":109,"high":127,"kind":"range","display":"109–127","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"109-127"}]},{"analyteId":"bicarbonate","name":"Bicarbonate","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":"71-52-3","whatItIs":null,"whyItMatters":null,"measured":{"value":119,"low":null,"high":null,"kind":"point","display":"119","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"119"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":119,"display":"119"},"range":{"low":107,"high":132,"display":"107–132"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":112,"display":"112"},"range":{"low":100,"high":124,"display":"100–124"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":110,"display":"110"},"range":{"low":92,"high":119,"display":"92–119"},"ratio":null}],"measurements":[{"value":132,"low":107,"high":132,"kind":"range","display":"107–132","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"107-132"},{"value":119,"low":null,"high":null,"kind":"point","display":"119","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"119"},{"value":112,"low":null,"high":null,"kind":"point","display":"112","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"112"},{"value":124,"low":100,"high":124,"kind":"range","display":"100–124","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"100-124"},{"value":119,"low":92,"high":119,"kind":"range","display":"92–119","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"92-119"},{"value":110,"low":null,"high":null,"kind":"point","display":"110","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"110"}]},{"analyteId":"hardness","name":"Hardness","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of dissolved calcium and magnesium minerals.","whyItMatters":"Not federally regulated for health; affects scaling, soap use, and taste.","measured":{"value":272,"low":null,"high":null,"kind":"point","display":"272","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","censored":false,"detectionLimit":null,"rawVerbatim":"272"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":270,"display":"270"},"range":{"low":235,"high":305,"display":"235–305"},"ratio":null},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":272,"display":"272"},"range":{"low":241,"high":303,"display":"241–303"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":142,"display":"142"},"range":{"low":112,"high":195,"display":"112–195"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":122,"display":"122"},"range":{"low":106,"high":174,"display":"106–174"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":148,"display":"148"},"range":{"low":143,"high":153,"display":"143–153"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":112,"display":"112"},"range":{"low":109,"high":113,"display":"109–113"},"ratio":null}],"measurements":[{"value":142,"low":null,"high":null,"kind":"point","display":"142","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"142"},{"value":148,"low":null,"high":null,"kind":"point","display":"148","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"148"},{"value":303,"low":241,"high":303,"kind":"range","display":"241–303","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"241-303"},{"value":305,"low":235,"high":305,"kind":"range","display":"235–305","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"235-305"},{"value":113,"low":109,"high":113,"kind":"range","display":"109–113","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"109-113"},{"value":153,"low":143,"high":153,"kind":"range","display":"143–153","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"143-153"},{"value":112,"low":null,"high":null,"kind":"point","display":"112","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"112"},{"value":270,"low":null,"high":null,"kind":"point","display":"270","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"270"},{"value":174,"low":106,"high":174,"kind":"range","display":"106–174","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"106-174"},{"value":272,"low":null,"high":null,"kind":"point","display":"272","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"272"},{"value":122,"low":null,"high":null,"kind":"point","display":"122","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"122"},{"value":195,"low":112,"high":195,"kind":"range","display":"112–195","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"112-195"}]},{"analyteId":"ph","name":"pH","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of how acidic or basic the water is.","whyItMatters":"Regulated only as a secondary standard; very low or high pH can corrode pipes or affect taste.","measured":{"value":8.3,"low":null,"high":null,"kind":"point","display":"8.3","units":null,"statisticType":"average","samplingContext":"plant:MWD Jensen Plant","censored":false,"detectionLimit":null,"rawVerbatim":"8.3"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"","average":{"value":8,"display":"8"},"range":{"low":7.1,"high":9,"display":"7.1–9"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"","average":{"value":7.9,"display":"7.9"},"range":{"low":6.9,"high":9,"display":"6.9–9"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"","average":{"value":7.7,"display":"7.7"},"range":{"low":7.2,"high":8.5,"display":"7.2–8.5"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"","average":{"value":8.3,"display":"8.3"},"range":{"low":8.2,"high":8.3,"display":"8.2–8.3"},"ratio":null},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"","average":{"value":8.2,"display":"8.2"},"range":{"low":null,"high":null,"display":"8.2"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"","average":{"value":8.2,"display":"8.2"},"range":{"low":null,"high":null,"display":"8.2"},"ratio":null}],"measurements":[{"value":8.3,"low":8.2,"high":8.3,"kind":"range","display":"8.2–8.3","units":null,"statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"8.2-8.3"},{"value":9,"low":7.1,"high":9,"kind":"range","display":"7.1–9","units":null,"statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"7.1-9.0"},{"value":8.2,"low":null,"high":null,"kind":"point","display":"8.2","units":null,"statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"8.2"},{"value":7.9,"low":null,"high":null,"kind":"point","display":"7.9","units":null,"statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"7.9"},{"value":7.7,"low":null,"high":null,"kind":"point","display":"7.7","units":null,"statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"7.7"},{"value":8.2,"low":null,"high":null,"kind":"point","display":"8.2","units":null,"statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"8.2"},{"value":8.5,"low":7.2,"high":8.5,"kind":"range","display":"7.2–8.5","units":null,"statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"7.2-8.5"},{"value":8.3,"low":null,"high":null,"kind":"point","display":"8.3","units":null,"statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"8.3"},{"value":8,"low":null,"high":null,"kind":"point","display":"8","units":null,"statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"8.0"},{"value":8.2,"low":null,"high":null,"kind":"point","display":"8.2","units":null,"statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"8.2"},{"value":8.2,"low":null,"high":null,"kind":"point","display":"8.2","units":null,"statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"8.2"},{"value":9,"low":6.9,"high":9,"kind":"range","display":"6.9–9","units":null,"statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"6.9-9.0"}]},{"analyteId":"temperature","name":"Temperature","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"The measured temperature of the water sample.","whyItMatters":"Not regulated for health; warmer water can affect disinfection and microbial growth.","measured":{"value":18.4,"low":null,"high":null,"kind":"point","display":"18.4","units":null,"statisticType":"average","samplingContext":"plant:Southern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"18.4"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"","average":{"value":18,"display":"18"},"range":{"low":8.5,"high":29.9,"display":"8.5–29.9"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"","average":{"value":18.4,"display":"18.4"},"range":{"low":10.7,"high":29.9,"display":"10.7–29.9"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"","average":{"value":17.1,"display":"17.1"},"range":{"low":8.1,"high":27.5,"display":"8.1–27.5"},"ratio":null}],"measurements":[{"value":18,"low":null,"high":null,"kind":"point","display":"18","units":null,"statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"18.0"},{"value":29.9,"low":10.7,"high":29.9,"kind":"range","display":"10.7–29.9","units":null,"statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"10.7-29.9"},{"value":27.5,"low":8.1,"high":27.5,"kind":"range","display":"8.1–27.5","units":null,"statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"8.1-27.5"},{"value":18.4,"low":null,"high":null,"kind":"point","display":"18.4","units":null,"statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"18.4"},{"value":17.1,"low":null,"high":null,"kind":"point","display":"17.1","units":null,"statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"17.1"},{"value":29.9,"low":8.5,"high":29.9,"kind":"range","display":"8.5–29.9","units":null,"statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"8.5-29.9"}]},{"analyteId":"toc","name":"TOC","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"Total organic carbon — a measure of organic material dissolved in the water.","whyItMatters":"Not harmful itself, but it is the raw material that forms disinfection byproducts; removal is a treatment requirement.","measured":{"value":2.4,"low":null,"high":null,"kind":"point","display":"2.4","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","censored":false,"detectionLimit":null,"rawVerbatim":"2.4"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":2.4,"display":"2.4"},"range":{"low":2.1,"high":2.6,"display":"2.1–2.6"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":2.4,"display":"2.4"},"range":{"low":2,"high":2.5,"display":"2–2.5"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":2.4,"display":"2.4"},"range":{"low":2,"high":2.5,"display":"2–2.5"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":1.9,"display":"1.9"},"range":{"low":1.5,"high":2.4,"display":"1.5–2.4"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":1.7,"display":"1.7"},"range":{"low":1.5,"high":2.1,"display":"1.5–2.1"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":1.8,"display":"1.8"},"range":{"low":1.7,"high":2,"display":"1.7–2"},"ratio":null}],"measurements":[{"value":2.4,"low":null,"high":null,"kind":"point","display":"2.4","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"2.4"},{"value":2.5,"low":2,"high":2.5,"kind":"range","display":"2–2.5","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"2.0-2.5"},{"value":2.4,"low":1.5,"high":2.4,"kind":"range","display":"1.5–2.4","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"1.5-2.4"},{"value":2,"low":1.7,"high":2,"kind":"range","display":"1.7–2","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"1.7-2.0"},{"value":1.8,"low":null,"high":null,"kind":"point","display":"1.8","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"1.8"},{"value":1.7,"low":null,"high":null,"kind":"point","display":"1.7","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"1.7"},{"value":2.4,"low":null,"high":null,"kind":"point","display":"2.4","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"2.4"},{"value":2.4,"low":null,"high":null,"kind":"point","display":"2.4","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"2.4"},{"value":2.6,"low":2.1,"high":2.6,"kind":"range","display":"2.1–2.6","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"2.1-2.6"},{"value":2.5,"low":2,"high":2.5,"kind":"range","display":"2–2.5","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"2.0-2.5"},{"value":1.9,"low":null,"high":null,"kind":"point","display":"1.9","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"1.9"},{"value":2.1,"low":1.5,"high":2.1,"kind":"range","display":"1.5–2.1","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"1.5-2.1"}]}]},{"family":"radionuclide","familyLabel":"Radionuclides","contaminants":[{"analyteId":"gross_alpha","name":"Gross Alpha","family":"radionuclide","familyLabel":"Radionuclides","casrn":null,"whatItIs":"Gross alpha particle activity — a combined measure of alpha-emitting radioactive substances.","whyItMatters":"Long-term exposure above the federal limit increases cancer risk.","measured":{"value":4,"low":null,"high":null,"kind":"point","display":"4","units":"pCi/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"4"},"federalStandard":{"type":"MCL","value":15,"units":"pCi/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":5,"display":"0–5"},"ratio":0.3333333333333333},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"pCi/L","average":{"value":4,"display":"4"},"range":{"low":3.5,"high":4.3,"display":"3.5–4.3"},"ratio":0.2866666666666667},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"pCi/L","average":{"value":3.5,"display":"3.5"},"range":{"low":3.5,"high":3.6,"display":"3.5–3.6"},"ratio":0.24000000000000002},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"pCi/L","average":{"value":3.1,"display":"3.1"},"range":{"low":null,"high":null,"display":"3.1"},"ratio":0.20666666666666667},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<3"},{"value":4,"low":null,"high":null,"kind":"point","display":"4","units":"pCi/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"4"},{"value":4.3,"low":3.5,"high":4.3,"kind":"range","display":"3.5–4.3","units":"pCi/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"3.5 - 4.3"},{"value":5,"low":0,"high":5,"kind":"range","display":"0–5","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<3-5"},{"value":3.5,"low":null,"high":null,"kind":"point","display":"3.5","units":"pCi/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"3.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<3"},{"value":3.6,"low":3.5,"high":3.6,"kind":"range","display":"3.5–3.6","units":"pCi/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"3.5 - 3.6"},{"value":3.1,"low":null,"high":null,"kind":"point","display":"3.1","units":"pCi/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"3.1"},{"value":3.1,"low":null,"high":null,"kind":"point","display":"3.1","units":"pCi/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"3.1"}]},{"analyteId":"gross_beta","name":"Gross Beta Particle Activity","family":"radionuclide","familyLabel":"Radionuclides","casrn":null,"whatItIs":"Gross beta particle activity — a combined measure of beta-emitting radioactive substances.","whyItMatters":"Long-term exposure above the federal screening level increases cancer risk.","measured":{"value":4.8,"low":null,"high":null,"kind":"point","display":"4.8","units":"pCi/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"4.8"},"federalStandard":{"type":"MCL","value":50,"units":"pCi/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"pCi/L","average":{"value":4.8,"display":"4.8"},"range":{"low":0,"high":6.3,"display":"0–6.3"},"ratio":0.126},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"pCi/L","average":{"value":4.3,"display":"4.3"},"range":{"low":0,"high":5.6,"display":"0–5.6"},"ratio":0.11199999999999999},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"pCi/L","average":{"value":4,"display":"4"},"range":{"low":0,"high":5,"display":"0–5"},"ratio":0.1},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":5,"display":"0–5"},"ratio":0.1},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"pCi/L","average":{"value":4,"display":"4"},"range":{"low":0,"high":4.9,"display":"0–4.9"},"ratio":0.098},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<4"},{"value":5,"low":0,"high":5,"kind":"range","display":"0–5","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<4-5"},{"value":4.3,"low":null,"high":null,"kind":"point","display":"4.3","units":"pCi/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"4.3"},{"value":4,"low":null,"high":null,"kind":"point","display":"4","units":"pCi/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"4"},{"value":5.6,"low":0,"high":5.6,"kind":"range","display":"0–5.6","units":"pCi/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<4-5.6"},{"value":4.8,"low":null,"high":null,"kind":"point","display":"4.8","units":"pCi/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"4.8"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<4"},{"value":4,"low":null,"high":null,"kind":"point","display":"4","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"4"},{"value":6.3,"low":0,"high":6.3,"kind":"range","display":"0–6.3","units":"pCi/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<4-6.3"},{"value":5,"low":0,"high":5,"kind":"range","display":"0–5","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<4-5"},{"value":4.9,"low":0,"high":4.9,"kind":"range","display":"0–4.9","units":"pCi/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<4 - 4.9"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<4"}]},{"analyteId":"uranium","name":"Uranium","family":"radionuclide","familyLabel":"Radionuclides","casrn":"7440-61-1","whatItIs":"A naturally occurring radioactive metal from erosion of natural deposits.","whyItMatters":"Long-term exposure above the federal limit can damage the kidneys and increase cancer risk.","measured":{"value":7,"low":null,"high":null,"kind":"point","display":"7","units":"pCi/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"7.0"},"federalStandard":{"type":"MCL","value":20,"units":"pCi/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"pCi/L","average":{"value":7,"display":"7"},"range":{"low":4.8,"high":8.5,"display":"4.8–8.5"},"ratio":0.425},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"pCi/L","average":{"value":7,"display":"7"},"range":{"low":4.8,"high":8.5,"display":"4.8–8.5"},"ratio":0.425},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"pCi/L","average":{"value":4.3,"display":"4.3"},"range":{"low":2.9,"high":5.9,"display":"2.9–5.9"},"ratio":0.29500000000000004},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"pCi/L","average":{"value":2,"display":"2"},"range":{"low":2,"high":3,"display":"2–3"},"ratio":0.15},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"pCi/L","average":{"value":1,"display":"1"},"range":{"low":0,"high":3,"display":"0–3"},"ratio":0.15},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":3,"display":"0–3"},"ratio":0.15}],"measurements":[{"value":3,"low":2,"high":3,"kind":"range","display":"2–3","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"2-3"},{"value":7,"low":null,"high":null,"kind":"point","display":"7","units":"pCi/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"7.0"},{"value":1,"low":null,"high":null,"kind":"point","display":"1","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"1"},{"value":3,"low":0,"high":3,"kind":"range","display":"0–3","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<1-3"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<1"},{"value":8.5,"low":4.8,"high":8.5,"kind":"range","display":"4.8–8.5","units":"pCi/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"4.8-8.5"},{"value":4.3,"low":null,"high":null,"kind":"point","display":"4.3","units":"pCi/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"4.3"},{"value":7,"low":null,"high":null,"kind":"point","display":"7","units":"pCi/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"7.0"},{"value":5.9,"low":2.9,"high":5.9,"kind":"range","display":"2.9–5.9","units":"pCi/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"2.9 - 5.9"},{"value":8.5,"low":4.8,"high":8.5,"kind":"range","display":"4.8–8.5","units":"pCi/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"4.8-8.5"},{"value":3,"low":0,"high":3,"kind":"range","display":"0–3","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<1-3"}]}]},{"family":"voc_pesticide","familyLabel":"VOCs & pesticides","contaminants":[{"analyteId":"dichloromethane","name":"Dichloromethane","family":"voc_pesticide","familyLabel":"VOCs & pesticides","casrn":"75-09-2","whatItIs":null,"whyItMatters":null,"measured":{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","censored":true,"detectionLimit":0.5,"rawVerbatim":"<0.5"},"federalStandard":{"type":"MCL","value":5,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":1.3,"display":"0–1.3"},"ratio":0.26},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<0.5"},{"value":1.3,"low":0,"high":1.3,"kind":"range","display":"0–1.3","units":"ug/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.5-1.3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<0.5"}]}]}],"contaminants":[{"analyteId":"chlorine","name":"Chlorine","family":"disinfectant","familyLabel":"Disinfectants","casrn":null,"whatItIs":"A disinfectant added to drinking water to kill bacteria and viruses.","whyItMatters":"Effective and necessary, but high residual levels can cause taste and odor issues; the EPA caps the residual disinfectant level.","measured":{"value":1.9,"low":null,"high":null,"kind":"point","display":"1.9","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"1.9 (a)"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":2,"low":1.7,"high":2,"kind":"range","display":"1.7–2","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"1.7 - 2"},{"value":1.9,"low":null,"high":null,"kind":"point","display":"1.9","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"1.9 (a)"}]},{"analyteId":"bromate","name":"Bromate","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":"15541-45-4","whatItIs":"A disinfection byproduct formed when bromide-containing water is treated with ozone.","whyItMatters":"Classified as a probable human carcinogen; the EPA sets a strict maximum contaminant level.","measured":{"value":3.1,"low":null,"high":null,"kind":"point","display":"3.1","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","censored":false,"detectionLimit":null,"rawVerbatim":"3.1"},"federalStandard":{"type":"MCL","value":10,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"ug/L","average":{"value":2,"display":"2"},"range":{"low":0,"high":9.2,"display":"0–9.2"},"ratio":0.9199999999999999},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"ug/L","average":{"value":3.1,"display":"3.1"},"range":{"low":0,"high":5.4,"display":"0–5.4"},"ratio":0.54},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":2,"display":"0–2"},"ratio":0.2},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":1.6,"display":"0–1.6"},"ratio":0.16},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":1.4,"display":"0–1.4"},"ratio":0.13999999999999999},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":5.4,"low":0,"high":5.4,"kind":"range","display":"0–5.4","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<1-5.4"},{"value":1.6,"low":0,"high":1.6,"kind":"range","display":"0–1.6","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<1-1.6"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<1"},{"value":2,"low":0,"high":2,"kind":"range","display":"0–2","units":"ug/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<1-2"},{"value":9.2,"low":0,"high":9.2,"kind":"range","display":"0–9.2","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<1-9.2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<1"},{"value":3.1,"low":null,"high":null,"kind":"point","display":"3.1","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"3.1"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"2"},{"value":1.4,"low":0,"high":1.4,"kind":"range","display":"0–1.4","units":"ug/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<1-1.4"}]},{"analyteId":"chlorate","name":"Chlorate","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":"14866-68-3","whatItIs":"A byproduct that can form during disinfection, especially when hypochlorite solutions degrade.","whyItMatters":"Has no enforceable federal limit but is on the EPA contaminant candidate list; high levels can affect the thyroid.","measured":{"value":366,"low":null,"high":null,"kind":"point","display":"366","units":null,"statisticType":"average","samplingContext":"plant:Southern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"366"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"","average":{"value":366,"display":"366"},"range":{"low":21,"high":820,"display":"21–820"},"ratio":null},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"","average":{"value":80,"display":"80"},"range":{"low":null,"high":null,"display":"80"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"","average":{"value":77,"display":"77"},"range":{"low":null,"high":null,"display":"77"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"","average":{"value":71,"display":"71"},"range":{"low":null,"high":null,"display":"71"},"ratio":null}],"measurements":[{"value":80,"low":null,"high":null,"kind":"point","display":"80","units":null,"statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"80"},{"value":820,"low":21,"high":820,"kind":"range","display":"21–820","units":null,"statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"21-820"},{"value":71,"low":null,"high":null,"kind":"point","display":"71","units":null,"statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"71"},{"value":77,"low":null,"high":null,"kind":"point","display":"77","units":null,"statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"77"},{"value":366,"low":null,"high":null,"kind":"point","display":"366","units":null,"statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"366"},{"value":77,"low":null,"high":null,"kind":"point","display":"77","units":null,"statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"77"},{"value":80,"low":null,"high":null,"kind":"point","display":"80","units":null,"statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"80"},{"value":71,"low":null,"high":null,"kind":"point","display":"71","units":null,"statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"71"}]},{"analyteId":"haa5","name":"HAA5","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":null,"whatItIs":"Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.","whyItMatters":"Long-term exposure above the federal limit is associated with an increased cancer risk.","measured":{"value":14.9,"low":null,"high":null,"kind":"point","display":"14.9","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"14.9 (f)"},"federalStandard":{"type":"MCL","value":60,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":14.9,"low":null,"high":null,"kind":"point","display":"14.9","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"14.9 (f)"},{"value":16.3,"low":3.6,"high":16.3,"kind":"range","display":"3.6–16.3","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"3.6 - 16.3"}]},{"analyteId":"ndba","name":"N-Nitrosodi-n-butylamine","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":"924-16-3","whatItIs":null,"whyItMatters":null,"measured":{"value":2.5,"low":null,"high":null,"kind":"point","display":"2.5","units":"ng/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","censored":false,"detectionLimit":null,"rawVerbatim":"2.5"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"ng/L","average":{"value":2.5,"display":"2.5"},"range":{"low":null,"high":null,"display":"2.5"},"ratio":null},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":null}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<2"},{"value":2.5,"low":null,"high":null,"kind":"point","display":"2.5","units":"ng/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"2.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<2"},{"value":2.5,"low":null,"high":null,"kind":"point","display":"2.5","units":"ng/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"2.5"}]},{"analyteId":"tthm","name":"TTHM","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":null,"whatItIs":"Total trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter.","whyItMatters":"Long-term exposure above the federal limit is linked to liver, kidney, and central-nervous-system effects and increased cancer risk.","measured":{"value":34.4,"low":null,"high":null,"kind":"point","display":"34.4","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"HLRAA = 34.4 (f)"},"federalStandard":{"type":"MCL","value":80,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":34.4,"low":null,"high":null,"kind":"point","display":"34.4","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"HLRAA = 34.4 (f)"},{"value":35.8,"low":13.9,"high":35.8,"kind":"range","display":"13.9–35.8","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"13.9 - 35.8"}]},{"analyteId":"bromide","name":"Bromide","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":"24959-67-9","whatItIs":"A naturally occurring salt found in source water.","whyItMatters":"Not directly regulated, but a precursor that increases formation of brominated disinfection byproducts.","measured":{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:Northern Combined Wells","censored":true,"detectionLimit":0.02,"rawVerbatim":"<0.02"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":0.1,"display":"0–0.1"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":0.1,"display":"0–0.1"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":0.1,"display":"0–0.1"},"ratio":null}],"measurements":[{"value":0.1,"low":0,"high":0.1,"kind":"range","display":"0–0.1","units":null,"statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.02-0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<0.02"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<0.02"},{"value":0.1,"low":0,"high":0.1,"kind":"range","display":"0–0.1","units":null,"statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<0.02-0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.02"},{"value":0.1,"low":0,"high":0.1,"kind":"range","display":"0–0.1","units":null,"statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<0.02-0.1"}]},{"analyteId":"fluoride","name":"Fluoride","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":"16984-48-8","whatItIs":"A mineral often added to drinking water to help prevent tooth decay.","whyItMatters":"Beneficial at low levels, but long-term exposure above the federal limit can cause bone disease and tooth mottling.","measured":{"value":0.8,"low":null,"high":null,"kind":"point","display":"0.8","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","censored":false,"detectionLimit":null,"rawVerbatim":"0.8"},"federalStandard":{"type":"MCL","value":2,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":0.8,"display":"0.8"},"range":{"low":0.7,"high":0.9,"display":"0.7–0.9"},"ratio":0.45},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":0.7,"display":"0.7"},"range":{"low":0.7,"high":0.8,"display":"0.7–0.8"},"ratio":0.4},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":0.8,"display":"0.8"},"range":{"low":0.7,"high":0.8,"display":"0.7–0.8"},"ratio":0.4},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":0.7,"display":"0.7"},"range":{"low":0.6,"high":0.8,"display":"0.6–0.8"},"ratio":0.4},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":0.7,"display":"0.7"},"range":{"low":0.6,"high":0.8,"display":"0.6–0.8"},"ratio":0.4},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":0.7,"display":"0.7"},"range":{"low":0.3,"high":0.8,"display":"0.3–0.8"},"ratio":0.4}],"measurements":[{"value":0.8,"low":0.7,"high":0.8,"kind":"range","display":"0.7–0.8","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"0.7 - 0.8"},{"value":0.9,"low":0.7,"high":0.9,"kind":"range","display":"0.7–0.9","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"0.7 - 0.9"},{"value":0.8,"low":0.7,"high":0.8,"kind":"range","display":"0.7–0.8","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"0.7 - 0.8"},{"value":0.8,"low":null,"high":null,"kind":"point","display":"0.8","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"0.8"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"0.7"},{"value":1,"low":0.3,"high":1,"kind":"range","display":"0.3–1","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.3 - 1"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"0.7"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"0.7"},{"value":0.8,"low":0.3,"high":0.8,"kind":"range","display":"0.3–0.8","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"0.3-0.8"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"0.7"},{"value":0.8,"low":0.6,"high":0.8,"kind":"range","display":"0.6–0.8","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"0.6-0.8"},{"value":0.8,"low":0.6,"high":0.8,"kind":"range","display":"0.6–0.8","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"0.6-0.8"},{"value":0.8,"low":null,"high":null,"kind":"point","display":"0.8","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"0.8"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"0.7"}]},{"analyteId":"nitrate","name":"Nitrate","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":"14797-55-8","whatItIs":"A compound from fertilizer runoff, septic systems, and erosion of natural deposits.","whyItMatters":"Levels above the federal limit can cause 'blue baby syndrome,' a serious oxygen-transport condition in infants.","measured":{"value":0.5,"low":null,"high":null,"kind":"point","display":"0.5","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","censored":false,"detectionLimit":null,"rawVerbatim":"0.5"},"federalStandard":{"type":"MCL","value":10,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":0.5,"display":"0.5"},"range":{"low":0,"high":2.4,"display":"0–2.4"},"ratio":0.24},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":0.5,"display":"0.5"},"range":{"low":0,"high":1.8,"display":"0–1.8"},"ratio":0.18},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":0.5,"display":"0–0.5"},"ratio":0.05},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":0.5,"display":"0.5"},"range":{"low":null,"high":null,"display":"0.5"},"ratio":0.05},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0.5,"low":0,"high":0.5,"kind":"range","display":"0–0.5","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.4-0.5"},{"value":2.4,"low":0,"high":2.4,"kind":"range","display":"0–2.4","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<0.4-2.4"},{"value":0.5,"low":null,"high":null,"kind":"point","display":"0.5","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"0.5"},{"value":0.5,"low":null,"high":null,"kind":"point","display":"0.5","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<0.4"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.4"},{"value":0.5,"low":null,"high":null,"kind":"point","display":"0.5","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"0.5"},{"value":0.5,"low":null,"high":null,"kind":"point","display":"0.5","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<0.4"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<0.4"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<0.4"},{"value":1.8,"low":0,"high":1.8,"kind":"range","display":"0–1.8","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<0.4-1.8"}]},{"analyteId":"aluminum","name":"Aluminum","family":"metal","familyLabel":"Metals","casrn":"7429-90-5","whatItIs":"A common element sometimes used as a treatment coagulant.","whyItMatters":"Regulated only as a secondary (cosmetic) standard; high levels can discolor water.","measured":{"value":93,"low":null,"high":null,"kind":"point","display":"93","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","censored":false,"detectionLimit":null,"rawVerbatim":"93 (a)"},"federalStandard":{"type":"MCL","value":1000,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"ug/L","average":{"value":93,"display":"93"},"range":{"low":0,"high":150,"display":"0–150"},"ratio":0.15},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":110,"display":"0–110"},"ratio":0.11},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"ug/L","average":{"value":62,"display":"62"},"range":{"low":52,"high":91,"display":"52–91"},"ratio":0.091},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":150,"low":0,"high":150,"kind":"range","display":"0–150","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<50-150"},{"value":91,"low":52,"high":91,"kind":"range","display":"52–91","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"52-91"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<50"},{"value":110,"low":0,"high":110,"kind":"range","display":"0–110","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<50-110"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<50"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<50 (a)"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<50"},{"value":62,"low":null,"high":null,"kind":"point","display":"62","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"62 (a)"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<50"},{"value":93,"low":null,"high":null,"kind":"point","display":"93","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"93 (a)"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<50"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<50"}]},{"analyteId":"arsenic","name":"Arsenic","family":"metal","familyLabel":"Metals","casrn":"7440-38-2","whatItIs":"A naturally occurring element that also enters water from industry and agriculture.","whyItMatters":"A known human carcinogen; long-term exposure is linked to skin, bladder, and lung cancer.","measured":{"value":3.5,"low":null,"high":null,"kind":"point","display":"3.5","units":"ug/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"3.5"},"federalStandard":{"type":"MCL","value":10,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"ug/L","average":{"value":3.5,"display":"3.5"},"range":{"low":0,"high":8.4,"display":"0–8.4"},"ratio":0.8400000000000001},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"ug/L","average":{"value":3.5,"display":"3.5"},"range":{"low":0,"high":6.3,"display":"0–6.3"},"ratio":0.63},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"ug/L","average":{"value":2.7,"display":"2.7"},"range":{"low":0,"high":4.5,"display":"0–4.5"},"ratio":0.45},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":6.3,"low":0,"high":6.3,"kind":"range","display":"0–6.3","units":"ug/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<2-6.3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<2"},{"value":3.5,"low":null,"high":null,"kind":"point","display":"3.5","units":"ug/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"3.5"},{"value":2.7,"low":null,"high":null,"kind":"point","display":"2.7","units":"ug/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"2.7"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<2"},{"value":8.4,"low":0,"high":8.4,"kind":"range","display":"0–8.4","units":"ug/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<2-8.4"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<2"},{"value":4.5,"low":0,"high":4.5,"kind":"range","display":"0–4.5","units":"ug/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<2-4.5"},{"value":3.5,"low":null,"high":null,"kind":"point","display":"3.5","units":"ug/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"3.5"}]},{"analyteId":"barium","name":"Barium","family":"metal","familyLabel":"Metals","casrn":"7440-39-3","whatItIs":"A metal from erosion of natural deposits and industrial discharge.","whyItMatters":"Long-term exposure above the federal limit can raise blood pressure.","measured":{"value":124,"low":null,"high":null,"kind":"point","display":"124","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","censored":false,"detectionLimit":null,"rawVerbatim":"124"},"federalStandard":{"type":"MCL","value":1000,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"ug/L","average":{"value":124,"display":"124"},"range":{"low":null,"high":null,"display":"124"},"ratio":0.124},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"ug/L","average":{"value":124,"display":"124"},"range":{"low":null,"high":null,"display":"124"},"ratio":0.124},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<100"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<100"},{"value":124,"low":null,"high":null,"kind":"point","display":"124","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"124"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<100"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<100"},{"value":124,"low":null,"high":null,"kind":"point","display":"124","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"124"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<100"},{"value":124,"low":null,"high":null,"kind":"point","display":"124","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"124"},{"value":124,"low":null,"high":null,"kind":"point","display":"124","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"124"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<100"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<100"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<100"}]},{"analyteId":"boron","name":"Boron","family":"metal","familyLabel":"Metals","casrn":"7440-42-8","whatItIs":"A naturally occurring element from rock and soil.","whyItMatters":"No enforceable federal limit; the EPA has issued a health advisory level.","measured":{"value":450,"low":null,"high":null,"kind":"point","display":"450","units":null,"statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","censored":false,"detectionLimit":null,"rawVerbatim":"450"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"","average":{"value":450,"display":"450"},"range":{"low":373,"high":507,"display":"373–507"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"","average":{"value":398,"display":"398"},"range":{"low":320,"high":501,"display":"320–501"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"","average":{"value":448,"display":"448"},"range":{"low":326,"high":501,"display":"326–501"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"","average":{"value":170,"display":"170"},"range":{"low":null,"high":null,"display":"170"},"ratio":null},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"","average":{"value":140,"display":"140"},"range":{"low":null,"high":null,"display":"140"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"","average":{"value":140,"display":"140"},"range":{"low":null,"high":null,"display":"140"},"ratio":null}],"measurements":[{"value":170,"low":null,"high":null,"kind":"point","display":"170","units":null,"statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"170"},{"value":140,"low":null,"high":null,"kind":"point","display":"140","units":null,"statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"140"},{"value":450,"low":null,"high":null,"kind":"point","display":"450","units":null,"statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"450"},{"value":398,"low":null,"high":null,"kind":"point","display":"398","units":null,"statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"398"},{"value":140,"low":null,"high":null,"kind":"point","display":"140","units":null,"statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"140"},{"value":170,"low":null,"high":null,"kind":"point","display":"170","units":null,"statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"170"},{"value":448,"low":null,"high":null,"kind":"point","display":"448","units":null,"statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"448"},{"value":140,"low":null,"high":null,"kind":"point","display":"140","units":null,"statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"140"},{"value":507,"low":373,"high":507,"kind":"range","display":"373–507","units":null,"statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"373-507"},{"value":501,"low":326,"high":501,"kind":"range","display":"326–501","units":null,"statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"326-501"},{"value":140,"low":null,"high":null,"kind":"point","display":"140","units":null,"statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"140"},{"value":501,"low":320,"high":501,"kind":"range","display":"320–501","units":null,"statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"320-501"}]},{"analyteId":"calcium","name":"Calcium","family":"metal","familyLabel":"Metals","casrn":"7440-70-2","whatItIs":"A naturally occurring mineral that contributes to water hardness.","whyItMatters":"Not federally regulated for health; affects scaling and taste.","measured":{"value":68,"low":null,"high":null,"kind":"point","display":"68","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","censored":false,"detectionLimit":null,"rawVerbatim":"68"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":68,"display":"68"},"range":{"low":58,"high":78,"display":"58–78"},"ratio":null},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":68,"display":"68"},"range":{"low":59,"high":76,"display":"59–76"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":41,"display":"41"},"range":{"low":30,"high":53,"display":"30–53"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":33,"display":"33"},"range":{"low":27,"high":49,"display":"27–49"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":38,"display":"38"},"range":{"low":38,"high":39,"display":"38–39"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":31,"display":"31"},"range":{"low":30,"high":32,"display":"30–32"},"ratio":null}],"measurements":[{"value":76,"low":59,"high":76,"kind":"range","display":"59–76","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"59-76"},{"value":39,"low":38,"high":39,"kind":"range","display":"38–39","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"38-39"},{"value":33,"low":null,"high":null,"kind":"point","display":"33","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"33"},{"value":78,"low":58,"high":78,"kind":"range","display":"58–78","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"58-78"},{"value":53,"low":30,"high":53,"kind":"range","display":"30–53","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"30-53"},{"value":32,"low":30,"high":32,"kind":"range","display":"30–32","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"30-32"},{"value":68,"low":null,"high":null,"kind":"point","display":"68","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"68"},{"value":38,"low":null,"high":null,"kind":"point","display":"38","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"38"},{"value":41,"low":null,"high":null,"kind":"point","display":"41","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"41"},{"value":49,"low":27,"high":49,"kind":"range","display":"27–49","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"27-49"},{"value":31,"low":null,"high":null,"kind":"point","display":"31","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"31"},{"value":68,"low":null,"high":null,"kind":"point","display":"68","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"68"}]},{"analyteId":"chromium_total","name":"Chromium, Total","family":"metal","familyLabel":"Metals","casrn":"7440-47-3","whatItIs":"Total chromium — the sum of all chromium forms, from natural deposits and industrial discharge.","whyItMatters":"Long-term exposure above the federal limit can cause allergic dermatitis; includes hexavalent chromium.","measured":{"value":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"0.2"},"federalStandard":{"type":"MCL","value":10,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0.2,"display":"0.2"},"range":{"low":0,"high":0.4,"display":"0–0.4"},"ratio":0.04},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0.1,"display":"0.1"},"range":{"low":0,"high":0.3,"display":"0–0.3"},"ratio":0.03},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0.4,"low":0,"high":0.4,"kind":"range","display":"0–0.4","units":"ug/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<0.1-0.4"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<0.1"},{"value":0.3,"low":0,"high":0.3,"kind":"range","display":"0–0.3","units":"ug/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<0.1-0.3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<0.1"},{"value":0.1,"low":null,"high":null,"kind":"point","display":"0.1","units":"ug/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"0.1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<0.1"},{"value":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"0.2"}]},{"analyteId":"copper","name":"Copper","family":"metal","familyLabel":"Metals","casrn":"7440-50-8","whatItIs":"A metal that enters water from corroding household plumbing.","whyItMatters":"Short-term exposure causes stomach distress; long-term exposure can damage the liver and kidneys.","measured":{"value":90,"low":null,"high":null,"kind":"point","display":"90","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"90th Percentile value = 529"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"Number of samples exceeding AL = 0 out of 105"},{"value":90,"low":null,"high":null,"kind":"point","display":"90","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"90th Percentile value = 529"}]},{"analyteId":"lead","name":"Lead","family":"metal","familyLabel":"Metals","casrn":"7439-92-1","whatItIs":"A toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.","whyItMatters":"There is no safe level of lead; it harms brain development in children and raises blood pressure in adults. The EPA sets an action level, not a health goal above zero.","measured":{"value":90,"low":null,"high":null,"kind":"point","display":"90","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"90th Percentile value = <5"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"Number of samples exceeding AL = 3 out of 105"},{"value":90,"low":null,"high":null,"kind":"point","display":"90","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"90th Percentile value = <5"}]},{"analyteId":"lithium","name":"Lithium","family":"metal","familyLabel":"Metals","casrn":"7439-93-2","whatItIs":"A naturally occurring element found in some groundwater.","whyItMatters":"No enforceable federal limit; on the EPA contaminant candidate list for further study.","measured":{"value":88,"low":null,"high":null,"kind":"point","display":"88","units":null,"statisticType":"average","samplingContext":"plant:San Fernando Valley Los Angeles Aqueduct Filtration plant","censored":false,"detectionLimit":null,"rawVerbatim":"88"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:San Fernando Valley Los Angeles Aqueduct Filtration plant","label":"San Fernando Valley Los Angeles Aqueduct Filtration plant","kind":"plant","units":"","average":{"value":88,"display":"88"},"range":{"low":80,"high":94,"display":"80–94"},"ratio":null},{"context":"plant:Western LA Los Angeles Aqueduct Filtration plant","label":"Western LA Los Angeles Aqueduct Filtration plant","kind":"plant","units":"","average":{"value":88,"display":"88"},"range":{"low":80,"high":94,"display":"80–94"},"ratio":null},{"context":"plant:San Fernando Valley Northern Combined Wells","label":"San Fernando Valley Northern Combined Wells","kind":"plant","units":"","average":{"value":69,"display":"69"},"range":{"low":63,"high":76,"display":"63–76"},"ratio":null},{"context":"plant:Central LA Southern Combined Wells","label":"Central LA Southern Combined Wells","kind":"plant","units":"","average":{"value":69,"display":"69"},"range":{"low":63,"high":76,"display":"63–76"},"ratio":null},{"context":"zone:Harbor/Eastern LA Distribution System Sampling Locations","label":"Harbor/Eastern LA Distribution System Sampling Locations","kind":"zone","units":"","average":{"value":38,"display":"38"},"range":{"low":10,"high":57,"display":"10–57"},"ratio":null}],"measurements":[{"value":88,"low":null,"high":null,"kind":"point","display":"88","units":null,"statisticType":"average","samplingContext":"plant:San Fernando Valley Los Angeles Aqueduct Filtration plant","rawVerbatim":"88"},{"value":88,"low":null,"high":null,"kind":"point","display":"88","units":null,"statisticType":"average","samplingContext":"plant:Western LA Los Angeles Aqueduct Filtration plant","rawVerbatim":"88"},{"value":76,"low":63,"high":76,"kind":"range","display":"63–76","units":null,"statisticType":"range","samplingContext":"plant:San Fernando Valley Northern Combined Wells","rawVerbatim":"63-76"},{"value":57,"low":10,"high":57,"kind":"range","display":"10–57","units":null,"statisticType":"range","samplingContext":"zone:Harbor/Eastern LA Distribution System Sampling Locations","rawVerbatim":"10-57"},{"value":69,"low":null,"high":null,"kind":"point","display":"69","units":null,"statisticType":"average","samplingContext":"plant:Central LA Southern Combined Wells","rawVerbatim":"69"},{"value":38,"low":null,"high":null,"kind":"point","display":"38","units":null,"statisticType":"average","samplingContext":"zone:Harbor/Eastern LA Distribution System Sampling Locations","rawVerbatim":"38"},{"value":69,"low":null,"high":null,"kind":"point","display":"69","units":null,"statisticType":"average","samplingContext":"plant:San Fernando Valley Northern Combined Wells","rawVerbatim":"69"},{"value":94,"low":80,"high":94,"kind":"range","display":"80–94","units":null,"statisticType":"range","samplingContext":"plant:San Fernando Valley Los Angeles Aqueduct Filtration plant","rawVerbatim":"80-94"},{"value":94,"low":80,"high":94,"kind":"range","display":"80–94","units":null,"statisticType":"range","samplingContext":"plant:Western LA Los Angeles Aqueduct Filtration plant","rawVerbatim":"80-94"},{"value":76,"low":63,"high":76,"kind":"range","display":"63–76","units":null,"statisticType":"range","samplingContext":"plant:Central LA Southern Combined Wells","rawVerbatim":"63-76"}]},{"analyteId":"magnesium","name":"Magnesium","family":"metal","familyLabel":"Metals","casrn":"7439-95-4","whatItIs":"A naturally occurring mineral that contributes to water hardness.","whyItMatters":"Not federally regulated for health; affects scaling and taste.","measured":{"value":26,"low":null,"high":null,"kind":"point","display":"26","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","censored":false,"detectionLimit":null,"rawVerbatim":"26.0"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":26,"display":"26"},"range":{"low":23,"high":29,"display":"23–29"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":26,"display":"26"},"range":{"low":22,"high":29,"display":"22–29"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":11.1,"display":"11.1"},"range":{"low":8.3,"high":15,"display":"8.3–15"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":14,"display":"14"},"range":{"low":13,"high":14,"display":"13–14"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":8.3,"display":"8.3"},"range":{"low":6.3,"high":12.9,"display":"6.3–12.9"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":8.3,"display":"8.3"},"range":{"low":7.6,"high":9.2,"display":"7.6–9.2"},"ratio":null}],"measurements":[{"value":9.2,"low":7.6,"high":9.2,"kind":"range","display":"7.6–9.2","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"7.6-9.2"},{"value":8.3,"low":null,"high":null,"kind":"point","display":"8.3","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"8.3"},{"value":15,"low":8.3,"high":15,"kind":"range","display":"8.3–15","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"8.3-15.0"},{"value":11.1,"low":null,"high":null,"kind":"point","display":"11.1","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"11.1"},{"value":26,"low":null,"high":null,"kind":"point","display":"26","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"26.0"},{"value":26,"low":null,"high":null,"kind":"point","display":"26","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"26.0"},{"value":14,"low":null,"high":null,"kind":"point","display":"14","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"14.0"},{"value":12.9,"low":6.3,"high":12.9,"kind":"range","display":"6.3–12.9","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"6.3-12.9"},{"value":14,"low":13,"high":14,"kind":"range","display":"13–14","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"13.0-14.0"},{"value":8.3,"low":null,"high":null,"kind":"point","display":"8.3","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"8.3"},{"value":29,"low":23,"high":29,"kind":"range","display":"23–29","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"23.0-29.0"},{"value":29,"low":22,"high":29,"kind":"range","display":"22–29","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"22.0-29.0"}]},{"analyteId":"potassium","name":"Potassium","family":"metal","familyLabel":"Metals","casrn":"7440-09-7","whatItIs":"A naturally occurring mineral from rock and soil.","whyItMatters":"Not federally regulated for health.","measured":{"value":5,"low":null,"high":null,"kind":"point","display":"5","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","censored":false,"detectionLimit":null,"rawVerbatim":"5.0"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":5,"display":"5"},"range":{"low":4.6,"high":5.4,"display":"4.6–5.4"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":4.9,"display":"4.9"},"range":{"low":4.4,"high":5.4,"display":"4.4–5.4"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":4.5,"display":"4.5"},"range":{"low":3.8,"high":5.3,"display":"3.8–5.3"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":4.4,"display":"4.4"},"range":{"low":3.8,"high":5.2,"display":"3.8–5.2"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":4.6,"display":"4.6"},"range":{"low":3.8,"high":5.2,"display":"3.8–5.2"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":2.6,"display":"2.6"},"range":{"low":null,"high":null,"display":"2.6"},"ratio":null}],"measurements":[{"value":5.2,"low":3.8,"high":5.2,"kind":"range","display":"3.8–5.2","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"3.8-5.2"},{"value":4.6,"low":null,"high":null,"kind":"point","display":"4.6","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"4.6"},{"value":2.6,"low":null,"high":null,"kind":"point","display":"2.6","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"2.6"},{"value":5.4,"low":4.6,"high":5.4,"kind":"range","display":"4.6–5.4","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"4.6-5.4"},{"value":4.4,"low":null,"high":null,"kind":"point","display":"4.4","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"4.4"},{"value":5,"low":null,"high":null,"kind":"point","display":"5","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"5.0"},{"value":4.5,"low":null,"high":null,"kind":"point","display":"4.5","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"4.5"},{"value":5.2,"low":3.8,"high":5.2,"kind":"range","display":"3.8–5.2","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"3.8-5.2"},{"value":4.9,"low":null,"high":null,"kind":"point","display":"4.9","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"4.9"},{"value":5.4,"low":4.4,"high":5.4,"kind":"range","display":"4.4–5.4","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"4.4-5.4"},{"value":5.3,"low":3.8,"high":5.3,"kind":"range","display":"3.8–5.3","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"3.8-5.3"},{"value":2.6,"low":null,"high":null,"kind":"point","display":"2.6","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"2.6"}]},{"analyteId":"silica","name":"Silica","family":"metal","familyLabel":"Metals","casrn":"7631-86-9","whatItIs":"A naturally occurring compound from sand and rock.","whyItMatters":"Not federally regulated for health; relevant mainly for industrial water use.","measured":{"value":19.2,"low":null,"high":null,"kind":"point","display":"19.2","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"19.2"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":19.2,"display":"19.2"},"range":{"low":14.4,"high":21.6,"display":"14.4–21.6"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":17.7,"display":"17.7"},"range":{"low":14.1,"high":20.7,"display":"14.1–20.7"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":18.7,"display":"18.7"},"range":{"low":14.4,"high":19.8,"display":"14.4–19.8"},"ratio":null}],"measurements":[{"value":21.6,"low":14.4,"high":21.6,"kind":"range","display":"14.4–21.6","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"14.4-21.6"},{"value":17.7,"low":null,"high":null,"kind":"point","display":"17.7","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"17.7"},{"value":19.2,"low":null,"high":null,"kind":"point","display":"19.2","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"19.2"},{"value":19.8,"low":14.4,"high":19.8,"kind":"range","display":"14.4–19.8","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"14.4-19.8"},{"value":20.7,"low":14.1,"high":20.7,"kind":"range","display":"14.1–20.7","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"14.1-20.7"},{"value":18.7,"low":null,"high":null,"kind":"point","display":"18.7","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"18.7"}]},{"analyteId":"sodium","name":"Sodium","family":"metal","familyLabel":"Metals","casrn":"7440-23-5","whatItIs":"A naturally occurring salt component.","whyItMatters":"Not federally regulated for health; relevant for people on sodium-restricted diets.","measured":{"value":105,"low":null,"high":null,"kind":"point","display":"105","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","censored":false,"detectionLimit":null,"rawVerbatim":"105.0"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":105,"display":"105"},"range":{"low":93,"high":117,"display":"93–117"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":103,"display":"103"},"range":{"low":90,"high":116,"display":"90–116"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":46.5,"display":"46.5"},"range":{"low":39.7,"high":57.3,"display":"39.7–57.3"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":43.2,"display":"43.2"},"range":{"low":34.6,"high":48.5,"display":"34.6–48.5"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":42.6,"display":"42.6"},"range":{"low":37.3,"high":47.5,"display":"37.3–47.5"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":46,"display":"46"},"range":{"low":null,"high":null,"display":"46"},"ratio":null}],"measurements":[{"value":43.2,"low":null,"high":null,"kind":"point","display":"43.2","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"43.2"},{"value":46.5,"low":null,"high":null,"kind":"point","display":"46.5","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"46.5"},{"value":117,"low":93,"high":117,"kind":"range","display":"93–117","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"93.0-117.0"},{"value":57.3,"low":39.7,"high":57.3,"kind":"range","display":"39.7–57.3","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"39.7-57.3"},{"value":42.6,"low":null,"high":null,"kind":"point","display":"42.6","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"42.6"},{"value":48.5,"low":34.6,"high":48.5,"kind":"range","display":"34.6–48.5","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"34.6-48.5"},{"value":46,"low":null,"high":null,"kind":"point","display":"46","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"46.0"},{"value":103,"low":null,"high":null,"kind":"point","display":"103","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"103.0"},{"value":116,"low":90,"high":116,"kind":"range","display":"90–116","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"90.0-116.0"},{"value":47.5,"low":37.3,"high":47.5,"kind":"range","display":"37.3–47.5","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"37.3-47.5"},{"value":46,"low":null,"high":null,"kind":"point","display":"46","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"46.0"},{"value":105,"low":null,"high":null,"kind":"point","display":"105","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"105.0"}]},{"analyteId":"total_coliform","name":"Total Coliform","family":"microbial","familyLabel":"Microbial","casrn":null,"whatItIs":"A group of bacteria used as an indicator of overall water-system sanitation.","whyItMatters":"Coliforms themselves are usually harmless, but their presence signals that disease-causing organisms could enter the system.","measured":{"value":0.6,"low":0,"high":0.6,"kind":"range","display":"0–0.6","units":"%","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"Range = 0% - 0.6% positive samples"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.6,"low":0,"high":0.6,"kind":"range","display":"0–0.6","units":"%","statisticType":"range","samplingContext":"system","rawVerbatim":"Range = 0% - 0.6% positive samples"}]},{"analyteId":"alkalinity","name":"Alkalinity","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of the water's capacity to neutralize acids.","whyItMatters":"Not federally regulated for health; relevant to corrosion control and treatment.","measured":{"value":119,"low":null,"high":null,"kind":"point","display":"119","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"119"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":119,"display":"119"},"range":{"low":107,"high":132,"display":"107–132"},"ratio":null},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":118,"display":"118"},"range":{"low":109,"high":127,"display":"109–127"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":112,"display":"112"},"range":{"low":100,"high":124,"display":"100–124"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":114,"display":"114"},"range":{"low":105,"high":123,"display":"105–123"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":110,"display":"110"},"range":{"low":92,"high":119,"display":"92–119"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":98,"display":"98"},"range":{"low":94,"high":101,"display":"94–101"},"ratio":null}],"measurements":[{"value":98,"low":null,"high":null,"kind":"point","display":"98","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"98"},{"value":118,"low":null,"high":null,"kind":"point","display":"118","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"118"},{"value":123,"low":105,"high":123,"kind":"range","display":"105–123","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"105-123"},{"value":132,"low":107,"high":132,"kind":"range","display":"107–132","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"107-132"},{"value":119,"low":null,"high":null,"kind":"point","display":"119","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"119"},{"value":112,"low":null,"high":null,"kind":"point","display":"112","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"112"},{"value":114,"low":null,"high":null,"kind":"point","display":"114","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"114"},{"value":101,"low":94,"high":101,"kind":"range","display":"94–101","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"94-101"},{"value":124,"low":100,"high":124,"kind":"range","display":"100–124","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"100-124"},{"value":110,"low":null,"high":null,"kind":"point","display":"110","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"110"},{"value":119,"low":92,"high":119,"kind":"range","display":"92–119","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"92-119"},{"value":127,"low":109,"high":127,"kind":"range","display":"109–127","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"109-127"}]},{"analyteId":"bicarbonate","name":"Bicarbonate","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":"71-52-3","whatItIs":null,"whyItMatters":null,"measured":{"value":119,"low":null,"high":null,"kind":"point","display":"119","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"119"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":119,"display":"119"},"range":{"low":107,"high":132,"display":"107–132"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":112,"display":"112"},"range":{"low":100,"high":124,"display":"100–124"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":110,"display":"110"},"range":{"low":92,"high":119,"display":"92–119"},"ratio":null}],"measurements":[{"value":132,"low":107,"high":132,"kind":"range","display":"107–132","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"107-132"},{"value":119,"low":null,"high":null,"kind":"point","display":"119","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"119"},{"value":112,"low":null,"high":null,"kind":"point","display":"112","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"112"},{"value":124,"low":100,"high":124,"kind":"range","display":"100–124","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"100-124"},{"value":119,"low":92,"high":119,"kind":"range","display":"92–119","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"92-119"},{"value":110,"low":null,"high":null,"kind":"point","display":"110","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"110"}]},{"analyteId":"hardness","name":"Hardness","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of dissolved calcium and magnesium minerals.","whyItMatters":"Not federally regulated for health; affects scaling, soap use, and taste.","measured":{"value":272,"low":null,"high":null,"kind":"point","display":"272","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","censored":false,"detectionLimit":null,"rawVerbatim":"272"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":270,"display":"270"},"range":{"low":235,"high":305,"display":"235–305"},"ratio":null},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":272,"display":"272"},"range":{"low":241,"high":303,"display":"241–303"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":142,"display":"142"},"range":{"low":112,"high":195,"display":"112–195"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":122,"display":"122"},"range":{"low":106,"high":174,"display":"106–174"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":148,"display":"148"},"range":{"low":143,"high":153,"display":"143–153"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":112,"display":"112"},"range":{"low":109,"high":113,"display":"109–113"},"ratio":null}],"measurements":[{"value":142,"low":null,"high":null,"kind":"point","display":"142","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"142"},{"value":148,"low":null,"high":null,"kind":"point","display":"148","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"148"},{"value":303,"low":241,"high":303,"kind":"range","display":"241–303","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"241-303"},{"value":305,"low":235,"high":305,"kind":"range","display":"235–305","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"235-305"},{"value":113,"low":109,"high":113,"kind":"range","display":"109–113","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"109-113"},{"value":153,"low":143,"high":153,"kind":"range","display":"143–153","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"143-153"},{"value":112,"low":null,"high":null,"kind":"point","display":"112","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"112"},{"value":270,"low":null,"high":null,"kind":"point","display":"270","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"270"},{"value":174,"low":106,"high":174,"kind":"range","display":"106–174","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"106-174"},{"value":272,"low":null,"high":null,"kind":"point","display":"272","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"272"},{"value":122,"low":null,"high":null,"kind":"point","display":"122","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"122"},{"value":195,"low":112,"high":195,"kind":"range","display":"112–195","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"112-195"}]},{"analyteId":"ph","name":"pH","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of how acidic or basic the water is.","whyItMatters":"Regulated only as a secondary standard; very low or high pH can corrode pipes or affect taste.","measured":{"value":8.3,"low":null,"high":null,"kind":"point","display":"8.3","units":null,"statisticType":"average","samplingContext":"plant:MWD Jensen Plant","censored":false,"detectionLimit":null,"rawVerbatim":"8.3"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"","average":{"value":8,"display":"8"},"range":{"low":7.1,"high":9,"display":"7.1–9"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"","average":{"value":7.9,"display":"7.9"},"range":{"low":6.9,"high":9,"display":"6.9–9"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"","average":{"value":7.7,"display":"7.7"},"range":{"low":7.2,"high":8.5,"display":"7.2–8.5"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"","average":{"value":8.3,"display":"8.3"},"range":{"low":8.2,"high":8.3,"display":"8.2–8.3"},"ratio":null},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"","average":{"value":8.2,"display":"8.2"},"range":{"low":null,"high":null,"display":"8.2"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"","average":{"value":8.2,"display":"8.2"},"range":{"low":null,"high":null,"display":"8.2"},"ratio":null}],"measurements":[{"value":8.3,"low":8.2,"high":8.3,"kind":"range","display":"8.2–8.3","units":null,"statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"8.2-8.3"},{"value":9,"low":7.1,"high":9,"kind":"range","display":"7.1–9","units":null,"statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"7.1-9.0"},{"value":8.2,"low":null,"high":null,"kind":"point","display":"8.2","units":null,"statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"8.2"},{"value":7.9,"low":null,"high":null,"kind":"point","display":"7.9","units":null,"statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"7.9"},{"value":7.7,"low":null,"high":null,"kind":"point","display":"7.7","units":null,"statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"7.7"},{"value":8.2,"low":null,"high":null,"kind":"point","display":"8.2","units":null,"statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"8.2"},{"value":8.5,"low":7.2,"high":8.5,"kind":"range","display":"7.2–8.5","units":null,"statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"7.2-8.5"},{"value":8.3,"low":null,"high":null,"kind":"point","display":"8.3","units":null,"statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"8.3"},{"value":8,"low":null,"high":null,"kind":"point","display":"8","units":null,"statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"8.0"},{"value":8.2,"low":null,"high":null,"kind":"point","display":"8.2","units":null,"statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"8.2"},{"value":8.2,"low":null,"high":null,"kind":"point","display":"8.2","units":null,"statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"8.2"},{"value":9,"low":6.9,"high":9,"kind":"range","display":"6.9–9","units":null,"statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"6.9-9.0"}]},{"analyteId":"temperature","name":"Temperature","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"The measured temperature of the water sample.","whyItMatters":"Not regulated for health; warmer water can affect disinfection and microbial growth.","measured":{"value":18.4,"low":null,"high":null,"kind":"point","display":"18.4","units":null,"statisticType":"average","samplingContext":"plant:Southern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"18.4"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"","average":{"value":18,"display":"18"},"range":{"low":8.5,"high":29.9,"display":"8.5–29.9"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"","average":{"value":18.4,"display":"18.4"},"range":{"low":10.7,"high":29.9,"display":"10.7–29.9"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"","average":{"value":17.1,"display":"17.1"},"range":{"low":8.1,"high":27.5,"display":"8.1–27.5"},"ratio":null}],"measurements":[{"value":18,"low":null,"high":null,"kind":"point","display":"18","units":null,"statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"18.0"},{"value":29.9,"low":10.7,"high":29.9,"kind":"range","display":"10.7–29.9","units":null,"statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"10.7-29.9"},{"value":27.5,"low":8.1,"high":27.5,"kind":"range","display":"8.1–27.5","units":null,"statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"8.1-27.5"},{"value":18.4,"low":null,"high":null,"kind":"point","display":"18.4","units":null,"statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"18.4"},{"value":17.1,"low":null,"high":null,"kind":"point","display":"17.1","units":null,"statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"17.1"},{"value":29.9,"low":8.5,"high":29.9,"kind":"range","display":"8.5–29.9","units":null,"statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"8.5-29.9"}]},{"analyteId":"toc","name":"TOC","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"Total organic carbon — a measure of organic material dissolved in the water.","whyItMatters":"Not harmful itself, but it is the raw material that forms disinfection byproducts; removal is a treatment requirement.","measured":{"value":2.4,"low":null,"high":null,"kind":"point","display":"2.4","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","censored":false,"detectionLimit":null,"rawVerbatim":"2.4"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"mg/L","average":{"value":2.4,"display":"2.4"},"range":{"low":2.1,"high":2.6,"display":"2.1–2.6"},"ratio":null},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":{"value":2.4,"display":"2.4"},"range":{"low":2,"high":2.5,"display":"2–2.5"},"ratio":null},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"mg/L","average":{"value":2.4,"display":"2.4"},"range":{"low":2,"high":2.5,"display":"2–2.5"},"ratio":null},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"mg/L","average":{"value":1.9,"display":"1.9"},"range":{"low":1.5,"high":2.4,"display":"1.5–2.4"},"ratio":null},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"mg/L","average":{"value":1.7,"display":"1.7"},"range":{"low":1.5,"high":2.1,"display":"1.5–2.1"},"ratio":null},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"mg/L","average":{"value":1.8,"display":"1.8"},"range":{"low":1.7,"high":2,"display":"1.7–2"},"ratio":null}],"measurements":[{"value":2.4,"low":null,"high":null,"kind":"point","display":"2.4","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"2.4"},{"value":2.5,"low":2,"high":2.5,"kind":"range","display":"2–2.5","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"2.0-2.5"},{"value":2.4,"low":1.5,"high":2.4,"kind":"range","display":"1.5–2.4","units":"mg/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"1.5-2.4"},{"value":2,"low":1.7,"high":2,"kind":"range","display":"1.7–2","units":"mg/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"1.7-2.0"},{"value":1.8,"low":null,"high":null,"kind":"point","display":"1.8","units":"mg/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"1.8"},{"value":1.7,"low":null,"high":null,"kind":"point","display":"1.7","units":"mg/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"1.7"},{"value":2.4,"low":null,"high":null,"kind":"point","display":"2.4","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"2.4"},{"value":2.4,"low":null,"high":null,"kind":"point","display":"2.4","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"2.4"},{"value":2.6,"low":2.1,"high":2.6,"kind":"range","display":"2.1–2.6","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"2.1-2.6"},{"value":2.5,"low":2,"high":2.5,"kind":"range","display":"2–2.5","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"2.0-2.5"},{"value":1.9,"low":null,"high":null,"kind":"point","display":"1.9","units":"mg/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"1.9"},{"value":2.1,"low":1.5,"high":2.1,"kind":"range","display":"1.5–2.1","units":"mg/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"1.5-2.1"}]},{"analyteId":"gross_alpha","name":"Gross Alpha","family":"radionuclide","familyLabel":"Radionuclides","casrn":null,"whatItIs":"Gross alpha particle activity — a combined measure of alpha-emitting radioactive substances.","whyItMatters":"Long-term exposure above the federal limit increases cancer risk.","measured":{"value":4,"low":null,"high":null,"kind":"point","display":"4","units":"pCi/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"4"},"federalStandard":{"type":"MCL","value":15,"units":"pCi/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":5,"display":"0–5"},"ratio":0.3333333333333333},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"pCi/L","average":{"value":4,"display":"4"},"range":{"low":3.5,"high":4.3,"display":"3.5–4.3"},"ratio":0.2866666666666667},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"pCi/L","average":{"value":3.5,"display":"3.5"},"range":{"low":3.5,"high":3.6,"display":"3.5–3.6"},"ratio":0.24000000000000002},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"pCi/L","average":{"value":3.1,"display":"3.1"},"range":{"low":null,"high":null,"display":"3.1"},"ratio":0.20666666666666667},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<3"},{"value":4,"low":null,"high":null,"kind":"point","display":"4","units":"pCi/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"4"},{"value":4.3,"low":3.5,"high":4.3,"kind":"range","display":"3.5–4.3","units":"pCi/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"3.5 - 4.3"},{"value":5,"low":0,"high":5,"kind":"range","display":"0–5","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<3-5"},{"value":3.5,"low":null,"high":null,"kind":"point","display":"3.5","units":"pCi/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"3.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<3"},{"value":3.6,"low":3.5,"high":3.6,"kind":"range","display":"3.5–3.6","units":"pCi/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"3.5 - 3.6"},{"value":3.1,"low":null,"high":null,"kind":"point","display":"3.1","units":"pCi/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"3.1"},{"value":3.1,"low":null,"high":null,"kind":"point","display":"3.1","units":"pCi/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"3.1"}]},{"analyteId":"gross_beta","name":"Gross Beta Particle Activity","family":"radionuclide","familyLabel":"Radionuclides","casrn":null,"whatItIs":"Gross beta particle activity — a combined measure of beta-emitting radioactive substances.","whyItMatters":"Long-term exposure above the federal screening level increases cancer risk.","measured":{"value":4.8,"low":null,"high":null,"kind":"point","display":"4.8","units":"pCi/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"4.8"},"federalStandard":{"type":"MCL","value":50,"units":"pCi/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"pCi/L","average":{"value":4.8,"display":"4.8"},"range":{"low":0,"high":6.3,"display":"0–6.3"},"ratio":0.126},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"pCi/L","average":{"value":4.3,"display":"4.3"},"range":{"low":0,"high":5.6,"display":"0–5.6"},"ratio":0.11199999999999999},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"pCi/L","average":{"value":4,"display":"4"},"range":{"low":0,"high":5,"display":"0–5"},"ratio":0.1},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":5,"display":"0–5"},"ratio":0.1},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"pCi/L","average":{"value":4,"display":"4"},"range":{"low":0,"high":4.9,"display":"0–4.9"},"ratio":0.098},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<4"},{"value":5,"low":0,"high":5,"kind":"range","display":"0–5","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<4-5"},{"value":4.3,"low":null,"high":null,"kind":"point","display":"4.3","units":"pCi/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"4.3"},{"value":4,"low":null,"high":null,"kind":"point","display":"4","units":"pCi/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"4"},{"value":5.6,"low":0,"high":5.6,"kind":"range","display":"0–5.6","units":"pCi/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<4-5.6"},{"value":4.8,"low":null,"high":null,"kind":"point","display":"4.8","units":"pCi/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"4.8"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<4"},{"value":4,"low":null,"high":null,"kind":"point","display":"4","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"4"},{"value":6.3,"low":0,"high":6.3,"kind":"range","display":"0–6.3","units":"pCi/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<4-6.3"},{"value":5,"low":0,"high":5,"kind":"range","display":"0–5","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<4-5"},{"value":4.9,"low":0,"high":4.9,"kind":"range","display":"0–4.9","units":"pCi/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<4 - 4.9"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<4"}]},{"analyteId":"uranium","name":"Uranium","family":"radionuclide","familyLabel":"Radionuclides","casrn":"7440-61-1","whatItIs":"A naturally occurring radioactive metal from erosion of natural deposits.","whyItMatters":"Long-term exposure above the federal limit can damage the kidneys and increase cancer risk.","measured":{"value":7,"low":null,"high":null,"kind":"point","display":"7","units":"pCi/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","censored":false,"detectionLimit":null,"rawVerbatim":"7.0"},"federalStandard":{"type":"MCL","value":20,"units":"pCi/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"pCi/L","average":{"value":7,"display":"7"},"range":{"low":4.8,"high":8.5,"display":"4.8–8.5"},"ratio":0.425},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"pCi/L","average":{"value":7,"display":"7"},"range":{"low":4.8,"high":8.5,"display":"4.8–8.5"},"ratio":0.425},{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"pCi/L","average":{"value":4.3,"display":"4.3"},"range":{"low":2.9,"high":5.9,"display":"2.9–5.9"},"ratio":0.29500000000000004},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"pCi/L","average":{"value":2,"display":"2"},"range":{"low":2,"high":3,"display":"2–3"},"ratio":0.15},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"pCi/L","average":{"value":1,"display":"1"},"range":{"low":0,"high":3,"display":"0–3"},"ratio":0.15},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":3,"display":"0–3"},"ratio":0.15}],"measurements":[{"value":3,"low":2,"high":3,"kind":"range","display":"2–3","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"2-3"},{"value":7,"low":null,"high":null,"kind":"point","display":"7","units":"pCi/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"7.0"},{"value":1,"low":null,"high":null,"kind":"point","display":"1","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"1"},{"value":3,"low":0,"high":3,"kind":"range","display":"0–3","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<1-3"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<1"},{"value":8.5,"low":4.8,"high":8.5,"kind":"range","display":"4.8–8.5","units":"pCi/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"4.8-8.5"},{"value":4.3,"low":null,"high":null,"kind":"point","display":"4.3","units":"pCi/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"4.3"},{"value":7,"low":null,"high":null,"kind":"point","display":"7","units":"pCi/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"7.0"},{"value":5.9,"low":2.9,"high":5.9,"kind":"range","display":"2.9–5.9","units":"pCi/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"2.9 - 5.9"},{"value":8.5,"low":4.8,"high":8.5,"kind":"range","display":"4.8–8.5","units":"pCi/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"4.8-8.5"},{"value":3,"low":0,"high":3,"kind":"range","display":"0–3","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<1-3"}]},{"analyteId":"dichloromethane","name":"Dichloromethane","family":"voc_pesticide","familyLabel":"VOCs & pesticides","casrn":"75-09-2","whatItIs":null,"whyItMatters":null,"measured":{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","censored":true,"detectionLimit":0.5,"rawVerbatim":"<0.5"},"federalStandard":{"type":"MCL","value":5,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Los Angeles Aqueduct Filtration Plant","label":"Los Angeles Aqueduct Filtration Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":1.3,"display":"0–1.3"},"ratio":0.26},{"context":"plant:MWD Weymouth Plant","label":"MWD Weymouth Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Southern Combined Wells","label":"Southern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Northern Combined Wells","label":"Northern Combined Wells","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:MWD Diemer Plant","label":"MWD Diemer Plant","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Southern Combined Wells","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<0.5"},{"value":1.3,"low":0,"high":1.3,"kind":"range","display":"0–1.3","units":"ug/L","statisticType":"range","samplingContext":"plant:Los Angeles Aqueduct Filtration Plant","rawVerbatim":"<0.5-1.3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Weymouth Plant","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Diemer Plant","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Northern Combined Wells","rawVerbatim":"<0.5"}]}]}}