{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-06-04T01:56:06.673Z"},"system":{"slug":"ca__nas-north-island-nab-coronado__CA3710750","name":"Nas North Island & Nab Coronado — San Diego, Ca","state":"CA","year":2021,"url":"https://www.thewatermap.com/water/ca/nas-north-island-nab-coronado-san-diego-ca/2021","apiUrl":"https://www.thewatermap.com/api/water/ca/nas-north-island-nab-coronado-san-diego-ca/2021","markdownUrl":"https://www.thewatermap.com/water/ca/nas-north-island-nab-coronado-san-diego-ca/2021/llms.txt","coordinates":{"latitude":32.7174202,"longitude":-117.162772},"contaminantsMeasured":17,"contaminantsWithFederalLimit":8,"contaminantsAtOrAboveLimit":0,"contaminantsApproachingLimit":1,"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":"bromate","name":"Bromate","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":"15541-45-4","whatItIs":"A disinfection byproduct formed when bromide-containing water is treated with ozone.","whyItMatters":"Classified as a probable human carcinogen; the EPA sets a strict maximum contaminant level.","measured":{"value":5.6,"low":0,"high":5.6,"kind":"range","display":"0–5.6","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[ND – 5.6]"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":5.6,"low":0,"high":5.6,"kind":"range","display":"0–5.6","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"[ND – 5.6]"}]},{"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,"low":null,"high":null,"kind":"point","display":"6","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"LRAA = 6"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":6,"low":null,"high":null,"kind":"point","display":"6","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"LRAA = 6"},{"value":9,"low":4.2,"high":9,"kind":"range","display":"4.2–9","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"4.2 – 9.0"}]},{"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":19,"low":null,"high":null,"kind":"point","display":"19","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"LRAA = 19"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":26,"low":14,"high":26,"kind":"range","display":"14–26","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"14.0 – 26.0"},{"value":19,"low":null,"high":null,"kind":"point","display":"19","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"LRAA = 19"}]}]},{"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":0.6,"low":null,"high":null,"kind":"point","display":"0.6","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[0.6]"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.6,"low":null,"high":null,"kind":"point","display":"0.6","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"[0.6]"},{"value":0.4,"low":0.3,"high":0.4,"kind":"range","display":"0.3–0.4","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"[0.3 – 0.4]"},{"value":0.3,"low":null,"high":null,"kind":"point","display":"0.3","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"[0.3]"},{"value":0.7,"low":0.3,"high":0.7,"kind":"range","display":"0.3–0.7","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"[0.3 – 0.7]"}]}]},{"family":"metal","familyLabel":"Metals","contaminants":[{"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":0.1,"low":0,"high":0.1,"kind":"range","display":"0–0.1","units":"mg/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[ND-0.1]"},"federalStandard":{"type":"MCL","value":2,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.1,"low":0,"high":0.1,"kind":"range","display":"0–0.1","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"[ND-0.1]"}]},{"analyteId":"boron","name":"Boron","family":"metal","familyLabel":"Metals","casrn":"7440-42-8","whatItIs":"A naturally occurring element from rock and soil.","whyItMatters":"No enforceable federal limit; the EPA has issued a health advisory level.","measured":{"value":0.1,"low":null,"high":null,"kind":"point","display":"0.1","units":"mg/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[0.1]"},"federalStandard":{"type":"NL","value":1,"units":"mg/L","enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.1,"low":null,"high":null,"kind":"point","display":"0.1","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"[0.1]"},{"value":0.1,"low":0.1,"high":0.1,"kind":"range","display":"0.1–0.1","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"[0.1-0.1]"}]},{"analyteId":"chromium_hex","name":"Chromium, Hexavalent","family":"metal","familyLabel":"Metals","casrn":"18540-29-9","whatItIs":"Hexavalent chromium ('chromium-6') — the more toxic form of chromium.","whyItMatters":"A known carcinogen by inhalation; regulated nationally only within the total-chromium limit, with stricter limits in some states.","measured":{"value":0.06,"low":null,"high":null,"kind":"point","display":"0.06","units":"ug/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[0.06]"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.06,"low":null,"high":null,"kind":"point","display":"0.06","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"[0.06]"}]},{"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":0.823,"low":null,"high":null,"kind":"point","display":"0.823","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"0.823"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.823,"low":null,"high":null,"kind":"point","display":"0.823","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"0.823"}]},{"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":2.65,"low":null,"high":null,"kind":"point","display":"2.65","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"2.65"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":20,"low":null,"high":null,"kind":"point","display":"20","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of Samples Collected","rawVerbatim":"20"},{"value":2.65,"low":null,"high":null,"kind":"point","display":"2.65","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"2.65"}]}]},{"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:No. of Detections","censored":false,"detectionLimit":null,"rawVerbatim":"0 (In the year)"},"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:No. of Detections","rawVerbatim":"0 (In the year)"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"0 (In the year)"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"0 (In the year)"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"0 (In the year)"}]},{"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,"low":null,"high":null,"kind":"point","display":"1","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","censored":false,"detectionLimit":null,"rawVerbatim":"1 (In a month)"},"federalStandard":{"type":"MCLG","value":0,"units":null,"enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":1,"low":null,"high":null,"kind":"point","display":"1","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"1 (In a month)"},{"value":1,"low":null,"high":null,"kind":"point","display":"1","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"1 (In a month)"}]}]},{"family":"other","familyLabel":"Other","contaminants":[{"analyteId":"chlorine_total","name":"Chlorine Total","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":1.07,"low":null,"high":null,"kind":"point","display":"1.07","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"1.07"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":1.07,"low":null,"high":null,"kind":"point","display":"1.07","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"1.07"},{"value":3.2,"low":0.06,"high":3.2,"kind":"range","display":"0.06–3.2","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.06 – 3.2"}]}]},{"family":"pfas","familyLabel":"PFAS (\"forever chemicals\")","contaminants":[{"analyteId":"pfoa","name":"PFOA","family":"pfas","familyLabel":"PFAS (\"forever chemicals\")","casrn":"335-67-1","whatItIs":"Perfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products.","whyItMatters":"Linked to cancer, liver damage, and immune effects; the EPA set an enforceable limit of 4 parts per trillion.","measured":{"value":3.3,"low":null,"high":null,"kind":"point","display":"3.3","units":"ng/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"3.3"},"federalStandard":null,"status":{"key":"approaching","label":"Approaching the limit"},"breakdowns":[],"measurements":[{"value":2.6,"low":null,"high":null,"kind":"point","display":"2.6","units":"ng/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"2.6"},{"value":3.3,"low":null,"high":null,"kind":"point","display":"3.3","units":"ng/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"3.3"},{"value":2.2,"low":null,"high":null,"kind":"point","display":"2.2","units":"ng/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"2.2"}]}]},{"family":"physical_aggregate","familyLabel":"Physical & aggregate","contaminants":[{"analyteId":"toc","name":"TOC","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"Total organic carbon — a measure of organic material dissolved in the water.","whyItMatters":"Not harmful itself, but it is the raw material that forms disinfection byproducts; removal is a treatment requirement.","measured":{"value":2.8,"low":null,"high":null,"kind":"point","display":"2.8","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[2.8]"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":2.8,"low":null,"high":null,"kind":"point","display":"2.8","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"[2.8]"},{"value":3.2,"low":2.2,"high":3.2,"kind":"range","display":"2.2–3.2","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"[2.2 – 3.2]"}]},{"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":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"NTU","statisticType":"max_single","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[0.11]"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"NTU","statisticType":"max_single","samplingContext":"system","rawVerbatim":"[0.11]"},{"value":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"NTU","statisticType":"max_single","samplingContext":"system","rawVerbatim":"[0.11]"}]}]},{"family":"radionuclide","familyLabel":"Radionuclides","contaminants":[{"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":7,"low":null,"high":null,"kind":"point","display":"7","units":"pCi/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[7]"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":7,"low":null,"high":null,"kind":"point","display":"7","units":"pCi/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"[7]"}]},{"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,"low":null,"high":null,"kind":"point","display":"3","units":"pCi/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[3]"},"federalStandard":{"type":"MCL","value":20,"units":"pCi/L","enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"pCi/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"[3]"}]}]}],"contaminants":[{"analyteId":"bromate","name":"Bromate","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":"15541-45-4","whatItIs":"A disinfection byproduct formed when bromide-containing water is treated with ozone.","whyItMatters":"Classified as a probable human carcinogen; the EPA sets a strict maximum contaminant level.","measured":{"value":5.6,"low":0,"high":5.6,"kind":"range","display":"0–5.6","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[ND – 5.6]"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":5.6,"low":0,"high":5.6,"kind":"range","display":"0–5.6","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"[ND – 5.6]"}]},{"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,"low":null,"high":null,"kind":"point","display":"6","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"LRAA = 6"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":6,"low":null,"high":null,"kind":"point","display":"6","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"LRAA = 6"},{"value":9,"low":4.2,"high":9,"kind":"range","display":"4.2–9","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"4.2 – 9.0"}]},{"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":19,"low":null,"high":null,"kind":"point","display":"19","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"LRAA = 19"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":26,"low":14,"high":26,"kind":"range","display":"14–26","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"14.0 – 26.0"},{"value":19,"low":null,"high":null,"kind":"point","display":"19","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"LRAA = 19"}]},{"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":0.6,"low":null,"high":null,"kind":"point","display":"0.6","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[0.6]"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.6,"low":null,"high":null,"kind":"point","display":"0.6","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"[0.6]"},{"value":0.4,"low":0.3,"high":0.4,"kind":"range","display":"0.3–0.4","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"[0.3 – 0.4]"},{"value":0.3,"low":null,"high":null,"kind":"point","display":"0.3","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"[0.3]"},{"value":0.7,"low":0.3,"high":0.7,"kind":"range","display":"0.3–0.7","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"[0.3 – 0.7]"}]},{"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":0.1,"low":0,"high":0.1,"kind":"range","display":"0–0.1","units":"mg/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[ND-0.1]"},"federalStandard":{"type":"MCL","value":2,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.1,"low":0,"high":0.1,"kind":"range","display":"0–0.1","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"[ND-0.1]"}]},{"analyteId":"boron","name":"Boron","family":"metal","familyLabel":"Metals","casrn":"7440-42-8","whatItIs":"A naturally occurring element from rock and soil.","whyItMatters":"No enforceable federal limit; the EPA has issued a health advisory level.","measured":{"value":0.1,"low":null,"high":null,"kind":"point","display":"0.1","units":"mg/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[0.1]"},"federalStandard":{"type":"NL","value":1,"units":"mg/L","enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.1,"low":null,"high":null,"kind":"point","display":"0.1","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"[0.1]"},{"value":0.1,"low":0.1,"high":0.1,"kind":"range","display":"0.1–0.1","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"[0.1-0.1]"}]},{"analyteId":"chromium_hex","name":"Chromium, Hexavalent","family":"metal","familyLabel":"Metals","casrn":"18540-29-9","whatItIs":"Hexavalent chromium ('chromium-6') — the more toxic form of chromium.","whyItMatters":"A known carcinogen by inhalation; regulated nationally only within the total-chromium limit, with stricter limits in some states.","measured":{"value":0.06,"low":null,"high":null,"kind":"point","display":"0.06","units":"ug/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[0.06]"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.06,"low":null,"high":null,"kind":"point","display":"0.06","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"[0.06]"}]},{"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":0.823,"low":null,"high":null,"kind":"point","display":"0.823","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"0.823"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.823,"low":null,"high":null,"kind":"point","display":"0.823","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"0.823"}]},{"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":2.65,"low":null,"high":null,"kind":"point","display":"2.65","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"2.65"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":20,"low":null,"high":null,"kind":"point","display":"20","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of Samples Collected","rawVerbatim":"20"},{"value":2.65,"low":null,"high":null,"kind":"point","display":"2.65","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"2.65"}]},{"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:No. of Detections","censored":false,"detectionLimit":null,"rawVerbatim":"0 (In the year)"},"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:No. of Detections","rawVerbatim":"0 (In the year)"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"0 (In the year)"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"0 (In the year)"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"0 (In the year)"}]},{"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,"low":null,"high":null,"kind":"point","display":"1","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","censored":false,"detectionLimit":null,"rawVerbatim":"1 (In a month)"},"federalStandard":{"type":"MCLG","value":0,"units":null,"enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":1,"low":null,"high":null,"kind":"point","display":"1","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"1 (In a month)"},{"value":1,"low":null,"high":null,"kind":"point","display":"1","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"1 (In a month)"}]},{"analyteId":"chlorine_total","name":"Chlorine Total","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":1.07,"low":null,"high":null,"kind":"point","display":"1.07","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"1.07"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":1.07,"low":null,"high":null,"kind":"point","display":"1.07","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"1.07"},{"value":3.2,"low":0.06,"high":3.2,"kind":"range","display":"0.06–3.2","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.06 – 3.2"}]},{"analyteId":"pfoa","name":"PFOA","family":"pfas","familyLabel":"PFAS (\"forever chemicals\")","casrn":"335-67-1","whatItIs":"Perfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products.","whyItMatters":"Linked to cancer, liver damage, and immune effects; the EPA set an enforceable limit of 4 parts per trillion.","measured":{"value":3.3,"low":null,"high":null,"kind":"point","display":"3.3","units":"ng/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"3.3"},"federalStandard":null,"status":{"key":"approaching","label":"Approaching the limit"},"breakdowns":[],"measurements":[{"value":2.6,"low":null,"high":null,"kind":"point","display":"2.6","units":"ng/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"2.6"},{"value":3.3,"low":null,"high":null,"kind":"point","display":"3.3","units":"ng/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"3.3"},{"value":2.2,"low":null,"high":null,"kind":"point","display":"2.2","units":"ng/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"2.2"}]},{"analyteId":"toc","name":"TOC","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"Total organic carbon — a measure of organic material dissolved in the water.","whyItMatters":"Not harmful itself, but it is the raw material that forms disinfection byproducts; removal is a treatment requirement.","measured":{"value":2.8,"low":null,"high":null,"kind":"point","display":"2.8","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[2.8]"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":2.8,"low":null,"high":null,"kind":"point","display":"2.8","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"[2.8]"},{"value":3.2,"low":2.2,"high":3.2,"kind":"range","display":"2.2–3.2","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"[2.2 – 3.2]"}]},{"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":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"NTU","statisticType":"max_single","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[0.11]"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"NTU","statisticType":"max_single","samplingContext":"system","rawVerbatim":"[0.11]"},{"value":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"NTU","statisticType":"max_single","samplingContext":"system","rawVerbatim":"[0.11]"}]},{"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":7,"low":null,"high":null,"kind":"point","display":"7","units":"pCi/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[7]"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":7,"low":null,"high":null,"kind":"point","display":"7","units":"pCi/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"[7]"}]},{"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,"low":null,"high":null,"kind":"point","display":"3","units":"pCi/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"[3]"},"federalStandard":{"type":"MCL","value":20,"units":"pCi/L","enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"pCi/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"[3]"}]}]}}