{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-06-04T00:38:36.052Z"},"system":{"slug":"ca__norwalk-city-water-dept__CA1910191__2021","name":"Norwalk - City, Water Dept. — Norwalk, Ca","state":"CA","year":2021,"url":"https://www.thewatermap.com/water/ca/norwalk-city-water-dept-norwalk-ca/2021","apiUrl":"https://www.thewatermap.com/api/water/ca/norwalk-city-water-dept-norwalk-ca/2021","markdownUrl":"https://www.thewatermap.com/water/ca/norwalk-city-water-dept-norwalk-ca/2021/llms.txt","coordinates":{"latitude":33.9092802,"longitude":-118.0849169},"contaminantsMeasured":20,"contaminantsWithFederalLimit":10,"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":"disinfection_byproduct","familyLabel":"Disinfection byproducts","contaminants":[{"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":10.9,"low":null,"high":null,"kind":"point","display":"10.9","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"zone:Distribution System Highest Running","censored":false,"detectionLimit":null,"rawVerbatim":"10.9"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"zone:Distribution System","label":"Distribution System","kind":"zone","units":"ug/L","average":null,"range":{"low":0,"high":14.1,"display":"0–14.1"},"ratio":0.23500000000000001},{"context":"zone:Distribution System Highest Running","label":"Distribution System Highest Running","kind":"zone","units":"ug/L","average":{"value":10.9,"display":"10.9"},"range":null,"ratio":0.18166666666666667}],"measurements":[{"value":10.9,"low":null,"high":null,"kind":"point","display":"10.9","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"zone:Distribution System Highest Running","rawVerbatim":"10.9"},{"value":14.1,"low":0,"high":14.1,"kind":"range","display":"0–14.1","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution System","rawVerbatim":"0.0 - 14.1"}]},{"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":39.3,"low":null,"high":null,"kind":"point","display":"39.3","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"zone:Distribution System Highest Running","censored":false,"detectionLimit":null,"rawVerbatim":"39.3"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"zone:Distribution System","label":"Distribution System","kind":"zone","units":"ug/L","average":null,"range":{"low":2.6,"high":46,"display":"2.6–46"},"ratio":0.575},{"context":"zone:Distribution System Highest Running","label":"Distribution System Highest Running","kind":"zone","units":"ug/L","average":{"value":39.3,"display":"39.3"},"range":null,"ratio":0.4912499999999999}],"measurements":[{"value":46,"low":2.6,"high":46,"kind":"range","display":"2.6–46","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution System","rawVerbatim":"2.6 - 46.0"},{"value":39.3,"low":null,"high":null,"kind":"point","display":"39.3","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"zone:Distribution System Highest Running","rawVerbatim":"39.3"}]}]},{"family":"inorganic","familyLabel":"Inorganic chemicals","contaminants":[{"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":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"0.70"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"mg/L","average":{"value":0.7,"display":"0.7"},"range":{"low":0.4,"high":0.9,"display":"0.4–0.9"},"ratio":0.225},{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"mg/L","average":{"value":0.24,"display":"0.24"},"range":{"low":0.2,"high":0.3,"display":"0.2–0.3"},"ratio":0.075}],"measurements":[{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"0.70"},{"value":0.9,"low":0.4,"high":0.9,"kind":"range","display":"0.4–0.9","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"0.4 - 0.9"},{"value":0.24,"low":null,"high":null,"kind":"point","display":"0.24","units":"mg/L","statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"0.24"},{"value":0.3,"low":0.2,"high":0.3,"kind":"range","display":"0.2–0.3","units":"mg/L","statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"0.2 - 0.3"}]},{"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":2.3,"low":null,"high":null,"kind":"point","display":"2.3","units":"mg/L","statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"2.3"},"federalStandard":{"type":"MCL","value":10,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"mg/L","average":{"value":2.3,"display":"2.3"},"range":{"low":0,"high":4.2,"display":"0–4.2"},"ratio":0.42000000000000004},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"mg/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":4.2,"low":0,"high":4.2,"kind":"range","display":"0–4.2","units":"mg/L","statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 4.2"},{"value":2.3,"low":null,"high":null,"kind":"point","display":"2.3","units":"mg/L","statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"2.3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"}]}]},{"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":0.14,"low":null,"high":null,"kind":"point","display":"0.14","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"0.14"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"mg/L","average":{"value":0.14,"display":"0.14"},"range":{"low":0,"high":0.24,"display":"0–0.24"},"ratio":null},{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"mg/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":null}],"measurements":[{"value":0.14,"low":null,"high":null,"kind":"point","display":"0.14","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"0.14"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND"},{"value":0.24,"low":0,"high":0.24,"kind":"range","display":"0–0.24","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND - 0.24"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"ND"}]},{"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":0.6,"low":null,"high":null,"kind":"point","display":"0.6","units":"ug/L","statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"0.6"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"ug/L","average":{"value":0.6,"display":"0.6"},"range":{"low":0,"high":2.5,"display":"0–2.5"},"ratio":0.25},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0.6,"low":null,"high":null,"kind":"point","display":"0.6","units":"ug/L","statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"0.6"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":2.5,"low":0,"high":2.5,"kind":"range","display":"0–2.5","units":"ug/L","statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 2.5"}]},{"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":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"0.11"},"federalStandard":{"type":"MCL","value":2,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"mg/L","average":{"value":0.11,"display":"0.11"},"range":{"low":null,"high":null,"display":"0.11"},"ratio":0.055},{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"mg/L","average":{"value":0.02,"display":"0.02"},"range":{"low":0,"high":0.09,"display":"0–0.09"},"ratio":0.045}],"measurements":[{"value":0.09,"low":0,"high":0.09,"kind":"range","display":"0–0.09","units":"mg/L","statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 0.09"},{"value":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"0.11"},{"value":0.02,"low":null,"high":null,"kind":"point","display":"0.02","units":"mg/L","statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"0.02"},{"value":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"0.11"}]},{"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":0.34,"low":null,"high":null,"kind":"point","display":"0.34","units":"mg/L","statisticType":"p90","samplingContext":"zone:Distribution System","censored":false,"detectionLimit":null,"rawVerbatim":"0.34 (h)"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.34,"low":null,"high":null,"kind":"point","display":"0.34","units":"mg/L","statisticType":"p90","samplingContext":"zone:Distribution System","rawVerbatim":"0.34 (h)"}]}]},{"family":"microbial","familyLabel":"Microbial","contaminants":[{"analyteId":"ecoli","name":"Escherichia coli (E. coli)","family":"microbial","familyLabel":"Microbial","casrn":null,"whatItIs":"Escherichia coli — bacteria found in the gut of humans and animals.","whyItMatters":"Its presence in drinking water indicates fecal contamination and a real risk of waterborne illness.","measured":{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"%","statisticType":"average","samplingContext":"zone:Distribution System Average % Positive","censored":false,"detectionLimit":null,"rawVerbatim":"0%"},"federalStandard":null,"status":{"key":"none","label":"None detected"},"breakdowns":[{"context":"zone:Distribution System Average % Positive","label":"Distribution System Average % Positive","kind":"zone","units":"%","average":{"value":0,"display":"0"},"range":null,"ratio":null},{"context":"zone:Distribution System Range % Positive","label":"Distribution System Range % Positive","kind":"zone","units":"%","average":null,"range":{"low":null,"high":null,"display":"0"},"ratio":null}],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"%","statisticType":"average","samplingContext":"zone:Distribution System Average % Positive","rawVerbatim":"0%"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"%","statisticType":"range","samplingContext":"zone:Distribution System Range % Positive","rawVerbatim":"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":0.4,"low":null,"high":null,"kind":"point","display":"0.4","units":"%","statisticType":"average","samplingContext":"zone:Distribution System Average % Positive","censored":false,"detectionLimit":null,"rawVerbatim":"0.4%"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:Distribution System Range % Positive","label":"Distribution System Range % Positive","kind":"zone","units":"%","average":null,"range":{"low":0,"high":4.4,"display":"0–4.4"},"ratio":null},{"context":"zone:Distribution System Average % Positive","label":"Distribution System Average % Positive","kind":"zone","units":"%","average":{"value":0.4,"display":"0.4"},"range":null,"ratio":null}],"measurements":[{"value":4.4,"low":0,"high":4.4,"kind":"range","display":"0–4.4","units":"%","statisticType":"range","samplingContext":"zone:Distribution System Range % Positive","rawVerbatim":"0% - 4.4%"},{"value":0.4,"low":null,"high":null,"kind":"point","display":"0.4","units":"%","statisticType":"average","samplingContext":"zone:Distribution System Average % Positive","rawVerbatim":"0.4%"}]}]},{"family":"other","familyLabel":"Other","contaminants":[{"analyteId":"chlorine_total","name":"Chlorine Total","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":1.3,"low":null,"high":null,"kind":"point","display":"1.3","units":"mg/L","statisticType":"running_annual_avg","samplingContext":"zone:Distribution System Highest Running","censored":false,"detectionLimit":null,"rawVerbatim":"1.3"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"zone:Distribution System","label":"Distribution System","kind":"zone","units":"mg/L","average":null,"range":{"low":0.2,"high":2.29,"display":"0.2–2.29"},"ratio":0.5725},{"context":"zone:Distribution System Highest Running","label":"Distribution System Highest Running","kind":"zone","units":"mg/L","average":{"value":1.3,"display":"1.3"},"range":null,"ratio":0.325}],"measurements":[{"value":1.3,"low":null,"high":null,"kind":"point","display":"1.3","units":"mg/L","statisticType":"running_annual_avg","samplingContext":"zone:Distribution System Highest Running","rawVerbatim":"1.3"},{"value":2.29,"low":0.2,"high":2.29,"kind":"range","display":"0.2–2.29","units":"mg/L","statisticType":"range","samplingContext":"zone:Distribution System","rawVerbatim":"0.20 - 2.29"}]},{"analyteId":"chromium","name":"Chromium","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":0.1,"low":null,"high":null,"kind":"point","display":"0.1","units":"ug/L","statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"0.1"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"ug/L","average":{"value":0.1,"display":"0.1"},"range":{"low":0,"high":1.2,"display":"0–1.2"},"ratio":0.011999999999999999},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","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's Surface Water","rawVerbatim":"ND"},{"value":0.1,"low":null,"high":null,"kind":"point","display":"0.1","units":"ug/L","statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"0.1"},{"value":1.2,"low":0,"high":1.2,"kind":"range","display":"0–1.2","units":"ug/L","statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 1.2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"}]}]},{"family":"physical_aggregate","familyLabel":"Physical & aggregate","contaminants":[{"analyteId":"turbidity","name":"Turbidity","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of cloudiness from suspended particles in the water.","whyItMatters":"High turbidity can shelter microbes from disinfection; the EPA enforces it through a treatment-technique standard.","measured":{"value":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":"NTU","statisticType":"average","samplingContext":"zone:Distribution System","censored":false,"detectionLimit":null,"rawVerbatim":"0.2"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":"NTU","statisticType":"average","samplingContext":"zone:Distribution System","rawVerbatim":"0.2"},{"value":1.1,"low":0,"high":1.1,"kind":"range","display":"0–1.1","units":"NTU","statisticType":"range","samplingContext":"zone:Distribution System","rawVerbatim":"<0.1 - 1.1"}]}]},{"family":"radionuclide","familyLabel":"Radionuclides","contaminants":[{"analyteId":"combined_radium","name":"Combined Radium","family":"radionuclide","familyLabel":"Radionuclides","casrn":null,"whatItIs":"Combined radium-226 and radium-228 — naturally occurring radioactive elements.","whyItMatters":"Long-term exposure above the federal limit increases the risk of bone cancer.","measured":{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":{"type":"MCL","value":5,"units":null,"enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":1,"display":"0–1"},"ratio":null},{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"","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":null,"statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"ND"},{"value":1,"low":0,"high":1,"kind":"range","display":"0–1","units":null,"statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND - 1.0"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND"}]},{"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":4.6,"low":null,"high":null,"kind":"point","display":"4.6","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"4.6"},"federalStandard":{"type":"MCL","value":15,"units":null,"enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"","average":{"value":4.6,"display":"4.6"},"range":{"low":4.55,"high":4.63,"display":"4.55–4.63"},"ratio":null},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":3,"display":"0–3"},"ratio":null}],"measurements":[{"value":4.63,"low":4.55,"high":4.63,"kind":"range","display":"4.55–4.63","units":null,"statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"4.55 - 4.63"},{"value":3,"low":0,"high":3,"kind":"range","display":"0–3","units":null,"statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND - 3.0"},{"value":4.6,"low":null,"high":null,"kind":"point","display":"4.6","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"4.6"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"}]},{"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":6,"low":null,"high":null,"kind":"point","display":"6","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"6.0"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":6,"low":null,"high":null,"kind":"point","display":"6","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"6.0"},{"value":9,"low":0,"high":9,"kind":"range","display":"0–9","units":null,"statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND - 9.0"}]},{"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":3.8,"low":null,"high":null,"kind":"point","display":"3.8","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"3.8"},"federalStandard":{"type":"MCL","value":20,"units":null,"enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"","average":{"value":3.8,"display":"3.8"},"range":{"low":0,"high":5.8,"display":"0–5.8"},"ratio":null},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"","average":{"value":2,"display":"2"},"range":{"low":1,"high":3,"display":"1–3"},"ratio":null}],"measurements":[{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"2.0"},{"value":3.8,"low":null,"high":null,"kind":"point","display":"3.8","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"3.8"},{"value":3,"low":1,"high":3,"kind":"range","display":"1–3","units":null,"statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"1.0 - 3.0"},{"value":5.8,"low":0,"high":5.8,"kind":"range","display":"0–5.8","units":null,"statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 5.8"}]}]},{"family":"voc_pesticide","familyLabel":"VOCs & pesticides","contaminants":[{"analyteId":"benzene","name":"Benzene","family":"voc_pesticide","familyLabel":"VOCs & pesticides","casrn":"71-43-2","whatItIs":null,"whyItMatters":null,"measured":{"value":1.2,"low":null,"high":null,"kind":"point","display":"1.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"1.2"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"ug/L","average":{"value":1.2,"display":"1.2"},"range":{"low":0,"high":3.2,"display":"0–3.2"},"ratio":0.64},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":1.2,"low":null,"high":null,"kind":"point","display":"1.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"1.2"},{"value":3.2,"low":0,"high":3.2,"kind":"range","display":"0–3.2","units":"ug/L","statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 3.2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"}]},{"analyteId":"tetrachloroethylene","name":"Tetrachloroethylene","family":"voc_pesticide","familyLabel":"VOCs & pesticides","casrn":"127-18-4","whatItIs":"An industrial solvent (PCE) used in dry cleaning and degreasing.","whyItMatters":"A likely human carcinogen; long-term exposure above the federal limit can damage the liver and kidneys.","measured":{"value":0.44,"low":null,"high":null,"kind":"point","display":"0.44","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"0.44"},"federalStandard":{"type":"MCL","value":5,"units":null,"enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"","average":{"value":0.44,"display":"0.44"},"range":{"low":0,"high":2,"display":"0–2"},"ratio":null},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"","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":null,"statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0.44,"low":null,"high":null,"kind":"point","display":"0.44","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"0.44"},{"value":2,"low":0,"high":2,"kind":"range","display":"0–2","units":null,"statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 2.0"}]},{"analyteId":"trichloroethylene","name":"Trichloroethylene","family":"voc_pesticide","familyLabel":"VOCs & pesticides","casrn":"79-01-6","whatItIs":"An industrial solvent (TCE) used in metal degreasing.","whyItMatters":"A known human carcinogen; long-term exposure above the federal limit can damage the liver.","measured":{"value":0.42,"low":null,"high":null,"kind":"point","display":"0.42","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"0.42"},"federalStandard":{"type":"MCL","value":5,"units":null,"enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"","average":{"value":0.42,"display":"0.42"},"range":{"low":0,"high":2,"display":"0–2"},"ratio":null},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"","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":null,"statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0.42,"low":null,"high":null,"kind":"point","display":"0.42","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"0.42"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":2,"low":0,"high":2,"kind":"range","display":"0–2","units":null,"statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 2.0"}]}]}],"contaminants":[{"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":10.9,"low":null,"high":null,"kind":"point","display":"10.9","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"zone:Distribution System Highest Running","censored":false,"detectionLimit":null,"rawVerbatim":"10.9"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"zone:Distribution System","label":"Distribution System","kind":"zone","units":"ug/L","average":null,"range":{"low":0,"high":14.1,"display":"0–14.1"},"ratio":0.23500000000000001},{"context":"zone:Distribution System Highest Running","label":"Distribution System Highest Running","kind":"zone","units":"ug/L","average":{"value":10.9,"display":"10.9"},"range":null,"ratio":0.18166666666666667}],"measurements":[{"value":10.9,"low":null,"high":null,"kind":"point","display":"10.9","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"zone:Distribution System Highest Running","rawVerbatim":"10.9"},{"value":14.1,"low":0,"high":14.1,"kind":"range","display":"0–14.1","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution System","rawVerbatim":"0.0 - 14.1"}]},{"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":39.3,"low":null,"high":null,"kind":"point","display":"39.3","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"zone:Distribution System Highest Running","censored":false,"detectionLimit":null,"rawVerbatim":"39.3"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"zone:Distribution System","label":"Distribution System","kind":"zone","units":"ug/L","average":null,"range":{"low":2.6,"high":46,"display":"2.6–46"},"ratio":0.575},{"context":"zone:Distribution System Highest Running","label":"Distribution System Highest Running","kind":"zone","units":"ug/L","average":{"value":39.3,"display":"39.3"},"range":null,"ratio":0.4912499999999999}],"measurements":[{"value":46,"low":2.6,"high":46,"kind":"range","display":"2.6–46","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution System","rawVerbatim":"2.6 - 46.0"},{"value":39.3,"low":null,"high":null,"kind":"point","display":"39.3","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"zone:Distribution System Highest Running","rawVerbatim":"39.3"}]},{"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":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"0.70"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"mg/L","average":{"value":0.7,"display":"0.7"},"range":{"low":0.4,"high":0.9,"display":"0.4–0.9"},"ratio":0.225},{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"mg/L","average":{"value":0.24,"display":"0.24"},"range":{"low":0.2,"high":0.3,"display":"0.2–0.3"},"ratio":0.075}],"measurements":[{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"0.70"},{"value":0.9,"low":0.4,"high":0.9,"kind":"range","display":"0.4–0.9","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"0.4 - 0.9"},{"value":0.24,"low":null,"high":null,"kind":"point","display":"0.24","units":"mg/L","statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"0.24"},{"value":0.3,"low":0.2,"high":0.3,"kind":"range","display":"0.2–0.3","units":"mg/L","statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"0.2 - 0.3"}]},{"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":2.3,"low":null,"high":null,"kind":"point","display":"2.3","units":"mg/L","statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"2.3"},"federalStandard":{"type":"MCL","value":10,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"mg/L","average":{"value":2.3,"display":"2.3"},"range":{"low":0,"high":4.2,"display":"0–4.2"},"ratio":0.42000000000000004},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"mg/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":4.2,"low":0,"high":4.2,"kind":"range","display":"0–4.2","units":"mg/L","statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 4.2"},{"value":2.3,"low":null,"high":null,"kind":"point","display":"2.3","units":"mg/L","statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"2.3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"}]},{"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":0.14,"low":null,"high":null,"kind":"point","display":"0.14","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"0.14"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"mg/L","average":{"value":0.14,"display":"0.14"},"range":{"low":0,"high":0.24,"display":"0–0.24"},"ratio":null},{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"mg/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":null}],"measurements":[{"value":0.14,"low":null,"high":null,"kind":"point","display":"0.14","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"0.14"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND"},{"value":0.24,"low":0,"high":0.24,"kind":"range","display":"0–0.24","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND - 0.24"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"ND"}]},{"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":0.6,"low":null,"high":null,"kind":"point","display":"0.6","units":"ug/L","statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"0.6"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"ug/L","average":{"value":0.6,"display":"0.6"},"range":{"low":0,"high":2.5,"display":"0–2.5"},"ratio":0.25},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0.6,"low":null,"high":null,"kind":"point","display":"0.6","units":"ug/L","statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"0.6"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":2.5,"low":0,"high":2.5,"kind":"range","display":"0–2.5","units":"ug/L","statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 2.5"}]},{"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":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"0.11"},"federalStandard":{"type":"MCL","value":2,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"mg/L","average":{"value":0.11,"display":"0.11"},"range":{"low":null,"high":null,"display":"0.11"},"ratio":0.055},{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"mg/L","average":{"value":0.02,"display":"0.02"},"range":{"low":0,"high":0.09,"display":"0–0.09"},"ratio":0.045}],"measurements":[{"value":0.09,"low":0,"high":0.09,"kind":"range","display":"0–0.09","units":"mg/L","statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 0.09"},{"value":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"0.11"},{"value":0.02,"low":null,"high":null,"kind":"point","display":"0.02","units":"mg/L","statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"0.02"},{"value":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"0.11"}]},{"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":0.34,"low":null,"high":null,"kind":"point","display":"0.34","units":"mg/L","statisticType":"p90","samplingContext":"zone:Distribution System","censored":false,"detectionLimit":null,"rawVerbatim":"0.34 (h)"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.34,"low":null,"high":null,"kind":"point","display":"0.34","units":"mg/L","statisticType":"p90","samplingContext":"zone:Distribution System","rawVerbatim":"0.34 (h)"}]},{"analyteId":"ecoli","name":"Escherichia coli (E. coli)","family":"microbial","familyLabel":"Microbial","casrn":null,"whatItIs":"Escherichia coli — bacteria found in the gut of humans and animals.","whyItMatters":"Its presence in drinking water indicates fecal contamination and a real risk of waterborne illness.","measured":{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"%","statisticType":"average","samplingContext":"zone:Distribution System Average % Positive","censored":false,"detectionLimit":null,"rawVerbatim":"0%"},"federalStandard":null,"status":{"key":"none","label":"None detected"},"breakdowns":[{"context":"zone:Distribution System Average % Positive","label":"Distribution System Average % Positive","kind":"zone","units":"%","average":{"value":0,"display":"0"},"range":null,"ratio":null},{"context":"zone:Distribution System Range % Positive","label":"Distribution System Range % Positive","kind":"zone","units":"%","average":null,"range":{"low":null,"high":null,"display":"0"},"ratio":null}],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"%","statisticType":"average","samplingContext":"zone:Distribution System Average % Positive","rawVerbatim":"0%"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"%","statisticType":"range","samplingContext":"zone:Distribution System Range % Positive","rawVerbatim":"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":0.4,"low":null,"high":null,"kind":"point","display":"0.4","units":"%","statisticType":"average","samplingContext":"zone:Distribution System Average % Positive","censored":false,"detectionLimit":null,"rawVerbatim":"0.4%"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:Distribution System Range % Positive","label":"Distribution System Range % Positive","kind":"zone","units":"%","average":null,"range":{"low":0,"high":4.4,"display":"0–4.4"},"ratio":null},{"context":"zone:Distribution System Average % Positive","label":"Distribution System Average % Positive","kind":"zone","units":"%","average":{"value":0.4,"display":"0.4"},"range":null,"ratio":null}],"measurements":[{"value":4.4,"low":0,"high":4.4,"kind":"range","display":"0–4.4","units":"%","statisticType":"range","samplingContext":"zone:Distribution System Range % Positive","rawVerbatim":"0% - 4.4%"},{"value":0.4,"low":null,"high":null,"kind":"point","display":"0.4","units":"%","statisticType":"average","samplingContext":"zone:Distribution System Average % Positive","rawVerbatim":"0.4%"}]},{"analyteId":"chlorine_total","name":"Chlorine Total","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":1.3,"low":null,"high":null,"kind":"point","display":"1.3","units":"mg/L","statisticType":"running_annual_avg","samplingContext":"zone:Distribution System Highest Running","censored":false,"detectionLimit":null,"rawVerbatim":"1.3"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"zone:Distribution System","label":"Distribution System","kind":"zone","units":"mg/L","average":null,"range":{"low":0.2,"high":2.29,"display":"0.2–2.29"},"ratio":0.5725},{"context":"zone:Distribution System Highest Running","label":"Distribution System Highest Running","kind":"zone","units":"mg/L","average":{"value":1.3,"display":"1.3"},"range":null,"ratio":0.325}],"measurements":[{"value":1.3,"low":null,"high":null,"kind":"point","display":"1.3","units":"mg/L","statisticType":"running_annual_avg","samplingContext":"zone:Distribution System Highest Running","rawVerbatim":"1.3"},{"value":2.29,"low":0.2,"high":2.29,"kind":"range","display":"0.2–2.29","units":"mg/L","statisticType":"range","samplingContext":"zone:Distribution System","rawVerbatim":"0.20 - 2.29"}]},{"analyteId":"chromium","name":"Chromium","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":0.1,"low":null,"high":null,"kind":"point","display":"0.1","units":"ug/L","statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"0.1"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"ug/L","average":{"value":0.1,"display":"0.1"},"range":{"low":0,"high":1.2,"display":"0–1.2"},"ratio":0.011999999999999999},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","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's Surface Water","rawVerbatim":"ND"},{"value":0.1,"low":null,"high":null,"kind":"point","display":"0.1","units":"ug/L","statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"0.1"},{"value":1.2,"low":0,"high":1.2,"kind":"range","display":"0–1.2","units":"ug/L","statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 1.2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"}]},{"analyteId":"turbidity","name":"Turbidity","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of cloudiness from suspended particles in the water.","whyItMatters":"High turbidity can shelter microbes from disinfection; the EPA enforces it through a treatment-technique standard.","measured":{"value":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":"NTU","statisticType":"average","samplingContext":"zone:Distribution System","censored":false,"detectionLimit":null,"rawVerbatim":"0.2"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":"NTU","statisticType":"average","samplingContext":"zone:Distribution System","rawVerbatim":"0.2"},{"value":1.1,"low":0,"high":1.1,"kind":"range","display":"0–1.1","units":"NTU","statisticType":"range","samplingContext":"zone:Distribution System","rawVerbatim":"<0.1 - 1.1"}]},{"analyteId":"combined_radium","name":"Combined Radium","family":"radionuclide","familyLabel":"Radionuclides","casrn":null,"whatItIs":"Combined radium-226 and radium-228 — naturally occurring radioactive elements.","whyItMatters":"Long-term exposure above the federal limit increases the risk of bone cancer.","measured":{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":{"type":"MCL","value":5,"units":null,"enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":1,"display":"0–1"},"ratio":null},{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"","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":null,"statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"ND"},{"value":1,"low":0,"high":1,"kind":"range","display":"0–1","units":null,"statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND - 1.0"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND"}]},{"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":4.6,"low":null,"high":null,"kind":"point","display":"4.6","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"4.6"},"federalStandard":{"type":"MCL","value":15,"units":null,"enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"","average":{"value":4.6,"display":"4.6"},"range":{"low":4.55,"high":4.63,"display":"4.55–4.63"},"ratio":null},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":3,"display":"0–3"},"ratio":null}],"measurements":[{"value":4.63,"low":4.55,"high":4.63,"kind":"range","display":"4.55–4.63","units":null,"statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"4.55 - 4.63"},{"value":3,"low":0,"high":3,"kind":"range","display":"0–3","units":null,"statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND - 3.0"},{"value":4.6,"low":null,"high":null,"kind":"point","display":"4.6","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"4.6"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"}]},{"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":6,"low":null,"high":null,"kind":"point","display":"6","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"6.0"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":6,"low":null,"high":null,"kind":"point","display":"6","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"6.0"},{"value":9,"low":0,"high":9,"kind":"range","display":"0–9","units":null,"statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND - 9.0"}]},{"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":3.8,"low":null,"high":null,"kind":"point","display":"3.8","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"3.8"},"federalStandard":{"type":"MCL","value":20,"units":null,"enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"","average":{"value":3.8,"display":"3.8"},"range":{"low":0,"high":5.8,"display":"0–5.8"},"ratio":null},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"","average":{"value":2,"display":"2"},"range":{"low":1,"high":3,"display":"1–3"},"ratio":null}],"measurements":[{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"2.0"},{"value":3.8,"low":null,"high":null,"kind":"point","display":"3.8","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"3.8"},{"value":3,"low":1,"high":3,"kind":"range","display":"1–3","units":null,"statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"1.0 - 3.0"},{"value":5.8,"low":0,"high":5.8,"kind":"range","display":"0–5.8","units":null,"statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 5.8"}]},{"analyteId":"benzene","name":"Benzene","family":"voc_pesticide","familyLabel":"VOCs & pesticides","casrn":"71-43-2","whatItIs":null,"whyItMatters":null,"measured":{"value":1.2,"low":null,"high":null,"kind":"point","display":"1.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"1.2"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"ug/L","average":{"value":1.2,"display":"1.2"},"range":{"low":0,"high":3.2,"display":"0–3.2"},"ratio":0.64},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":1.2,"low":null,"high":null,"kind":"point","display":"1.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"1.2"},{"value":3.2,"low":0,"high":3.2,"kind":"range","display":"0–3.2","units":"ug/L","statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 3.2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"}]},{"analyteId":"tetrachloroethylene","name":"Tetrachloroethylene","family":"voc_pesticide","familyLabel":"VOCs & pesticides","casrn":"127-18-4","whatItIs":"An industrial solvent (PCE) used in dry cleaning and degreasing.","whyItMatters":"A likely human carcinogen; long-term exposure above the federal limit can damage the liver and kidneys.","measured":{"value":0.44,"low":null,"high":null,"kind":"point","display":"0.44","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"0.44"},"federalStandard":{"type":"MCL","value":5,"units":null,"enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"","average":{"value":0.44,"display":"0.44"},"range":{"low":0,"high":2,"display":"0–2"},"ratio":null},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"","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":null,"statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0.44,"low":null,"high":null,"kind":"point","display":"0.44","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"0.44"},{"value":2,"low":0,"high":2,"kind":"range","display":"0–2","units":null,"statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 2.0"}]},{"analyteId":"trichloroethylene","name":"Trichloroethylene","family":"voc_pesticide","familyLabel":"VOCs & pesticides","casrn":"79-01-6","whatItIs":"An industrial solvent (TCE) used in metal degreasing.","whyItMatters":"A known human carcinogen; long-term exposure above the federal limit can damage the liver.","measured":{"value":0.42,"low":null,"high":null,"kind":"point","display":"0.42","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","censored":false,"detectionLimit":null,"rawVerbatim":"0.42"},"federalStandard":{"type":"MCL","value":5,"units":null,"enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Groundwater","label":"Groundwater","kind":"plant","units":"","average":{"value":0.42,"display":"0.42"},"range":{"low":0,"high":2,"display":"0–2"},"ratio":null},{"context":"plant:MWD's Surface Water","label":"MWD's Surface Water","kind":"plant","units":"","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":null,"statisticType":"range","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":0.42,"low":null,"high":null,"kind":"point","display":"0.42","units":null,"statisticType":"average","samplingContext":"plant:Groundwater","rawVerbatim":"0.42"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"plant:MWD's Surface Water","rawVerbatim":"ND"},{"value":2,"low":0,"high":2,"kind":"range","display":"0–2","units":null,"statisticType":"range","samplingContext":"plant:Groundwater","rawVerbatim":"ND - 2.0"}]}]}}