{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-06-04T00:59:03.705Z"},"system":{"slug":"ca__cal-am-water-company-baldwin-hills__CA1910052__2022","name":"Cal/am Water Company - Baldwin Hills — Rosemead, Ca","state":"CA","year":2022,"url":"https://www.thewatermap.com/water/ca/cal-am-water-company-baldwin-hills-rosemead-ca/2022","apiUrl":"https://www.thewatermap.com/api/water/ca/cal-am-water-company-baldwin-hills-rosemead-ca/2022","markdownUrl":"https://www.thewatermap.com/water/ca/cal-am-water-company-baldwin-hills-rosemead-ca/2022/llms.txt","coordinates":{"latitude":34.0146113,"longitude":-118.3603104},"contaminantsMeasured":15,"contaminantsWithFederalLimit":9,"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":1.34,"low":null,"high":null,"kind":"point","display":"1.34","units":"mg/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"1.34"},"federalStandard":{"type":"MRDLG","value":4,"units":"mg/L","enforceable":false},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":1.22,"low":null,"high":null,"kind":"point","display":"1.22","units":"mg/L","statisticType":"range","samplingContext":"plant:Range Detected","rawVerbatim":"1.22 to 1.49"},{"value":1.34,"low":null,"high":null,"kind":"point","display":"1.34","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"1.34"},{"value":1.221,"low":null,"high":null,"kind":"point","display":"1.221","units":"mg/L","statisticType":"min","samplingContext":"plant:Chlorine Residual","rawVerbatim":"1.221"}]}]},{"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":6.5,"low":null,"high":null,"kind":"point","display":"6.5","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"6.5"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":6.1,"low":null,"high":null,"kind":"point","display":"6.1","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"6.1"},{"value":9.6,"low":null,"high":null,"kind":"point","display":"9.6","units":"ug/L","statisticType":"range","samplingContext":"plant:Range Detected","rawVerbatim":"ND to 9.6"},{"value":6.5,"low":null,"high":null,"kind":"point","display":"6.5","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"system","rawVerbatim":"6.5"},{"value":1.9,"low":null,"high":null,"kind":"point","display":"1.9","units":"ug/L","statisticType":"range","samplingContext":"plant:Range Detected","rawVerbatim":"1.9 to 10"}]},{"analyteId":"haa9","name":"HAA9","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":8.8,"low":null,"high":null,"kind":"point","display":"8.8","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"8.8"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":2.5,"low":null,"high":null,"kind":"point","display":"2.5","units":"ug/L","statisticType":"range","samplingContext":"plant:Range Detected","rawVerbatim":"2.5 to 19"},{"value":8.8,"low":null,"high":null,"kind":"point","display":"8.8","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"8.8"}]},{"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":29,"low":null,"high":null,"kind":"point","display":"29","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"29"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":2.6,"low":null,"high":null,"kind":"point","display":"2.6","units":"ug/L","statisticType":"range","samplingContext":"plant:Range Detected","rawVerbatim":"2.6 to 44"},{"value":29,"low":null,"high":null,"kind":"point","display":"29","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"system","rawVerbatim":"29"}]}]},{"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:MWDSC 40% Weymouth WTP","censored":false,"detectionLimit":null,"rawVerbatim":"0.7"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWDSC 40% Weymouth WTP","label":"MWDSC 40% Weymouth WTP","kind":"plant","units":"mg/L","average":{"value":0.7,"display":"0.7"},"range":{"low":null,"high":null,"display":"0.6"},"ratio":0.175},{"context":"plant:Baldwin Hills 60% Wells","label":"Baldwin Hills 60% Wells","kind":"plant","units":"mg/L","average":{"value":0.36,"display":"0.36"},"range":{"low":null,"high":null,"display":"0.33"},"ratio":0.09}],"measurements":[{"value":0.6,"low":null,"high":null,"kind":"point","display":"0.6","units":"mg/L","statisticType":"range","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"0.6 to 0.8"},{"value":0.33,"low":null,"high":null,"kind":"point","display":"0.33","units":"mg/L","statisticType":"range","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"0.33 to 0.38"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"0.7"},{"value":0.36,"low":null,"high":null,"kind":"point","display":"0.36","units":"mg/L","statisticType":"average","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"0.36"}]},{"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":2.8,"low":null,"high":null,"kind":"point","display":"2.8","units":"mg/L","statisticType":"average","samplingContext":"plant:Baldwin Hills 60% Wells","censored":false,"detectionLimit":null,"rawVerbatim":"2.8"},"federalStandard":{"type":"MCL","value":10,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Baldwin Hills 60% Wells","label":"Baldwin Hills 60% Wells","kind":"plant","units":"mg/L","average":{"value":2.8,"display":"2.8"},"range":{"low":null,"high":null,"display":"1.7"},"ratio":0.27999999999999997},{"context":"plant:MWDSC 40% Weymouth WTP","label":"MWDSC 40% Weymouth WTP","kind":"plant","units":"mg/L","average":{"value":0.8,"display":"0.8"},"range":{"low":null,"high":null,"display":"0.8"},"ratio":0.08}],"measurements":[{"value":2.8,"low":null,"high":null,"kind":"point","display":"2.8","units":"mg/L","statisticType":"average","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"2.8"},{"value":1.7,"low":null,"high":null,"kind":"point","display":"1.7","units":"mg/L","statisticType":"range","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"1.7 to 3.6"},{"value":0.8,"low":null,"high":null,"kind":"point","display":"0.8","units":"mg/L","statisticType":"average","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"0.8"},{"value":0.8,"low":null,"high":null,"kind":"point","display":"0.8","units":"mg/L","statisticType":"range","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"0.8"}]}]},{"family":"metal","familyLabel":"Metals","contaminants":[{"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":0.209,"low":null,"high":null,"kind":"point","display":"0.209","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"0.209"},"federalStandard":{"type":"PHG","value":1.3,"units":"mg/L","enforceable":false},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"mg/L","statisticType":"reported_level","samplingContext":"plant:Premises Above Action Level","rawVerbatim":"0"},{"value":0.209,"low":null,"high":null,"kind":"point","display":"0.209","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"0.209"}]},{"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":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"2"},"federalStandard":{"type":"PHG","value":0.2,"units":"ug/L","enforceable":false},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"2"},{"value":30,"low":null,"high":null,"kind":"point","display":"30","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of Premises Sampled","rawVerbatim":"30"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:Premises Above Action Level","rawVerbatim":"0"}]},{"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":12,"low":null,"high":null,"kind":"point","display":"12","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"12"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":12,"low":null,"high":null,"kind":"point","display":"12","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"12"},{"value":23,"low":null,"high":null,"kind":"point","display":"23","units":"ug/L","statisticType":"range","samplingContext":"plant:Range Detected","rawVerbatim":"ND to 23"}]}]},{"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":null,"statisticType":"max_single","samplingContext":"plant:Percentage","censored":false,"detectionLimit":null,"rawVerbatim":"0"},"federalStandard":{"type":"MCLG","value":0,"units":null,"enforceable":false},"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max_single","samplingContext":"plant:Percentage","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":1.59,"low":null,"high":null,"kind":"point","display":"1.59","units":null,"statisticType":"max_single","samplingContext":"plant:Percentage","censored":false,"detectionLimit":null,"rawVerbatim":"1.59%"},"federalStandard":{"type":"MCLG","value":0,"units":null,"enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":1.59,"low":null,"high":null,"kind":"point","display":"1.59","units":null,"statisticType":"max_single","samplingContext":"plant:Percentage","rawVerbatim":"1.59%"}]}]},{"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":0.06,"low":null,"high":null,"kind":"point","display":"0.06","units":"NTU","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.06"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.06,"low":null,"high":null,"kind":"point","display":"0.06","units":"NTU","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.06"}]}]},{"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":6.3,"low":null,"high":null,"kind":"point","display":"6.3","units":"pCi/L","statisticType":"average","samplingContext":"plant:Baldwin Hills 60% Wells","censored":false,"detectionLimit":null,"rawVerbatim":"6.3"},"federalStandard":{"type":"MCL","value":15,"units":"pCi/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Baldwin Hills 60% Wells","label":"Baldwin Hills 60% Wells","kind":"plant","units":"pCi/L","average":{"value":6.3,"display":"6.3"},"range":{"low":null,"high":null,"display":"3.7"},"ratio":0.42},{"context":"plant:MWDSC 40% Weymouth WTP","label":"MWDSC 40% Weymouth WTP","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":6.3,"low":null,"high":null,"kind":"point","display":"6.3","units":"pCi/L","statisticType":"average","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"6.3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"ND"},{"value":3.7,"low":null,"high":null,"kind":"point","display":"3.7","units":"pCi/L","statisticType":"range","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"3.7 to 10"}]},{"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":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWDSC 40% Weymouth WTP","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"ND"},{"value":6,"low":null,"high":null,"kind":"point","display":"6","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"ND to 6"}]},{"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":3.4,"low":null,"high":null,"kind":"point","display":"3.4","units":"pCi/L","statisticType":"average","samplingContext":"plant:Baldwin Hills 60% Wells","censored":false,"detectionLimit":null,"rawVerbatim":"3.4"},"federalStandard":{"type":"MCL","value":20,"units":"pCi/L","enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Baldwin Hills 60% Wells","label":"Baldwin Hills 60% Wells","kind":"plant","units":"pCi/L","average":{"value":3.4,"display":"3.4"},"range":{"low":null,"high":null,"display":"0.67"},"ratio":null},{"context":"plant:MWDSC 40% Weymouth WTP","label":"MWDSC 40% Weymouth WTP","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"3"},"ratio":null}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"ND"},{"value":0.67,"low":null,"high":null,"kind":"point","display":"0.67","units":"pCi/L","statisticType":"range","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"0.67 to 6.0"},{"value":3.4,"low":null,"high":null,"kind":"point","display":"3.4","units":"pCi/L","statisticType":"average","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"3.4"},{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"ND to 3.0"}]}]}],"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":1.34,"low":null,"high":null,"kind":"point","display":"1.34","units":"mg/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"1.34"},"federalStandard":{"type":"MRDLG","value":4,"units":"mg/L","enforceable":false},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":1.22,"low":null,"high":null,"kind":"point","display":"1.22","units":"mg/L","statisticType":"range","samplingContext":"plant:Range Detected","rawVerbatim":"1.22 to 1.49"},{"value":1.34,"low":null,"high":null,"kind":"point","display":"1.34","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"1.34"},{"value":1.221,"low":null,"high":null,"kind":"point","display":"1.221","units":"mg/L","statisticType":"min","samplingContext":"plant:Chlorine Residual","rawVerbatim":"1.221"}]},{"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":6.5,"low":null,"high":null,"kind":"point","display":"6.5","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"6.5"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":6.1,"low":null,"high":null,"kind":"point","display":"6.1","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"6.1"},{"value":9.6,"low":null,"high":null,"kind":"point","display":"9.6","units":"ug/L","statisticType":"range","samplingContext":"plant:Range Detected","rawVerbatim":"ND to 9.6"},{"value":6.5,"low":null,"high":null,"kind":"point","display":"6.5","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"system","rawVerbatim":"6.5"},{"value":1.9,"low":null,"high":null,"kind":"point","display":"1.9","units":"ug/L","statisticType":"range","samplingContext":"plant:Range Detected","rawVerbatim":"1.9 to 10"}]},{"analyteId":"haa9","name":"HAA9","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":8.8,"low":null,"high":null,"kind":"point","display":"8.8","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"8.8"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":2.5,"low":null,"high":null,"kind":"point","display":"2.5","units":"ug/L","statisticType":"range","samplingContext":"plant:Range Detected","rawVerbatim":"2.5 to 19"},{"value":8.8,"low":null,"high":null,"kind":"point","display":"8.8","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"8.8"}]},{"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":29,"low":null,"high":null,"kind":"point","display":"29","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"29"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":2.6,"low":null,"high":null,"kind":"point","display":"2.6","units":"ug/L","statisticType":"range","samplingContext":"plant:Range Detected","rawVerbatim":"2.6 to 44"},{"value":29,"low":null,"high":null,"kind":"point","display":"29","units":"ug/L","statisticType":"running_annual_avg","samplingContext":"system","rawVerbatim":"29"}]},{"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:MWDSC 40% Weymouth WTP","censored":false,"detectionLimit":null,"rawVerbatim":"0.7"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWDSC 40% Weymouth WTP","label":"MWDSC 40% Weymouth WTP","kind":"plant","units":"mg/L","average":{"value":0.7,"display":"0.7"},"range":{"low":null,"high":null,"display":"0.6"},"ratio":0.175},{"context":"plant:Baldwin Hills 60% Wells","label":"Baldwin Hills 60% Wells","kind":"plant","units":"mg/L","average":{"value":0.36,"display":"0.36"},"range":{"low":null,"high":null,"display":"0.33"},"ratio":0.09}],"measurements":[{"value":0.6,"low":null,"high":null,"kind":"point","display":"0.6","units":"mg/L","statisticType":"range","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"0.6 to 0.8"},{"value":0.33,"low":null,"high":null,"kind":"point","display":"0.33","units":"mg/L","statisticType":"range","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"0.33 to 0.38"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"0.7"},{"value":0.36,"low":null,"high":null,"kind":"point","display":"0.36","units":"mg/L","statisticType":"average","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"0.36"}]},{"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":2.8,"low":null,"high":null,"kind":"point","display":"2.8","units":"mg/L","statisticType":"average","samplingContext":"plant:Baldwin Hills 60% Wells","censored":false,"detectionLimit":null,"rawVerbatim":"2.8"},"federalStandard":{"type":"MCL","value":10,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Baldwin Hills 60% Wells","label":"Baldwin Hills 60% Wells","kind":"plant","units":"mg/L","average":{"value":2.8,"display":"2.8"},"range":{"low":null,"high":null,"display":"1.7"},"ratio":0.27999999999999997},{"context":"plant:MWDSC 40% Weymouth WTP","label":"MWDSC 40% Weymouth WTP","kind":"plant","units":"mg/L","average":{"value":0.8,"display":"0.8"},"range":{"low":null,"high":null,"display":"0.8"},"ratio":0.08}],"measurements":[{"value":2.8,"low":null,"high":null,"kind":"point","display":"2.8","units":"mg/L","statisticType":"average","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"2.8"},{"value":1.7,"low":null,"high":null,"kind":"point","display":"1.7","units":"mg/L","statisticType":"range","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"1.7 to 3.6"},{"value":0.8,"low":null,"high":null,"kind":"point","display":"0.8","units":"mg/L","statisticType":"average","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"0.8"},{"value":0.8,"low":null,"high":null,"kind":"point","display":"0.8","units":"mg/L","statisticType":"range","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"0.8"}]},{"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":0.209,"low":null,"high":null,"kind":"point","display":"0.209","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"0.209"},"federalStandard":{"type":"PHG","value":1.3,"units":"mg/L","enforceable":false},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"mg/L","statisticType":"reported_level","samplingContext":"plant:Premises Above Action Level","rawVerbatim":"0"},{"value":0.209,"low":null,"high":null,"kind":"point","display":"0.209","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"0.209"}]},{"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":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"2"},"federalStandard":{"type":"PHG","value":0.2,"units":"ug/L","enforceable":false},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"2"},{"value":30,"low":null,"high":null,"kind":"point","display":"30","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of Premises Sampled","rawVerbatim":"30"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:Premises Above Action Level","rawVerbatim":"0"}]},{"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":12,"low":null,"high":null,"kind":"point","display":"12","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"12"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":12,"low":null,"high":null,"kind":"point","display":"12","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"12"},{"value":23,"low":null,"high":null,"kind":"point","display":"23","units":"ug/L","statisticType":"range","samplingContext":"plant:Range Detected","rawVerbatim":"ND to 23"}]},{"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":null,"statisticType":"max_single","samplingContext":"plant:Percentage","censored":false,"detectionLimit":null,"rawVerbatim":"0"},"federalStandard":{"type":"MCLG","value":0,"units":null,"enforceable":false},"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max_single","samplingContext":"plant:Percentage","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":1.59,"low":null,"high":null,"kind":"point","display":"1.59","units":null,"statisticType":"max_single","samplingContext":"plant:Percentage","censored":false,"detectionLimit":null,"rawVerbatim":"1.59%"},"federalStandard":{"type":"MCLG","value":0,"units":null,"enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":1.59,"low":null,"high":null,"kind":"point","display":"1.59","units":null,"statisticType":"max_single","samplingContext":"plant:Percentage","rawVerbatim":"1.59%"}]},{"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":0.06,"low":null,"high":null,"kind":"point","display":"0.06","units":"NTU","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.06"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.06,"low":null,"high":null,"kind":"point","display":"0.06","units":"NTU","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.06"}]},{"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":6.3,"low":null,"high":null,"kind":"point","display":"6.3","units":"pCi/L","statisticType":"average","samplingContext":"plant:Baldwin Hills 60% Wells","censored":false,"detectionLimit":null,"rawVerbatim":"6.3"},"federalStandard":{"type":"MCL","value":15,"units":"pCi/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Baldwin Hills 60% Wells","label":"Baldwin Hills 60% Wells","kind":"plant","units":"pCi/L","average":{"value":6.3,"display":"6.3"},"range":{"low":null,"high":null,"display":"3.7"},"ratio":0.42},{"context":"plant:MWDSC 40% Weymouth WTP","label":"MWDSC 40% Weymouth WTP","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":6.3,"low":null,"high":null,"kind":"point","display":"6.3","units":"pCi/L","statisticType":"average","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"6.3"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"ND"},{"value":3.7,"low":null,"high":null,"kind":"point","display":"3.7","units":"pCi/L","statisticType":"range","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"3.7 to 10"}]},{"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":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWDSC 40% Weymouth WTP","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"ND"},{"value":6,"low":null,"high":null,"kind":"point","display":"6","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"ND to 6"}]},{"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":3.4,"low":null,"high":null,"kind":"point","display":"3.4","units":"pCi/L","statisticType":"average","samplingContext":"plant:Baldwin Hills 60% Wells","censored":false,"detectionLimit":null,"rawVerbatim":"3.4"},"federalStandard":{"type":"MCL","value":20,"units":"pCi/L","enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Baldwin Hills 60% Wells","label":"Baldwin Hills 60% Wells","kind":"plant","units":"pCi/L","average":{"value":3.4,"display":"3.4"},"range":{"low":null,"high":null,"display":"0.67"},"ratio":null},{"context":"plant:MWDSC 40% Weymouth WTP","label":"MWDSC 40% Weymouth WTP","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"3"},"ratio":null}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"ND"},{"value":0.67,"low":null,"high":null,"kind":"point","display":"0.67","units":"pCi/L","statisticType":"range","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"0.67 to 6.0"},{"value":3.4,"low":null,"high":null,"kind":"point","display":"3.4","units":"pCi/L","statisticType":"average","samplingContext":"plant:Baldwin Hills 60% Wells","rawVerbatim":"3.4"},{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWDSC 40% Weymouth WTP","rawVerbatim":"ND to 3.0"}]}]}}