{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-06-04T00:43:51.694Z"},"system":{"slug":"ca__santa-fe-springs-city-water-dept__CA1910245__2020","name":"Santa Fe Springs - City, Water Dept. — Santa Fe Springs, Ca","state":"CA","year":2020,"url":"https://www.thewatermap.com/water/ca/santa-fe-springs-city-water-dept-santa-fe-springs-ca/2020","apiUrl":"https://www.thewatermap.com/api/water/ca/santa-fe-springs-city-water-dept-santa-fe-springs-ca/2020","markdownUrl":"https://www.thewatermap.com/water/ca/santa-fe-springs-city-water-dept-santa-fe-springs-ca/2020/llms.txt","coordinates":{"latitude":33.9480787,"longitude":-118.0691499},"contaminantsMeasured":26,"contaminantsWithFederalLimit":12,"contaminantsAtOrAboveLimit":2,"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":"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":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":7,"low":0,"high":7,"kind":"range","display":"0–7","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND - 7"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND"}]},{"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":8.1,"low":null,"high":null,"kind":"point","display":"8.1","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"8.1"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":5.3,"low":3.9,"high":5.3,"kind":"range","display":"3.9–5.3","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"3.9 - 5.3"},{"value":7.4,"low":null,"high":null,"kind":"point","display":"7.4","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"7.4"},{"value":4.7,"low":3.3,"high":4.7,"kind":"range","display":"3.3–4.7","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"3.3 - 4.7"},{"value":4.3,"low":null,"high":null,"kind":"point","display":"4.3","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"4.3"},{"value":12,"low":3.9,"high":12,"kind":"range","display":"3.9–12","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"3.9 - 12"},{"value":8.1,"low":null,"high":null,"kind":"point","display":"8.1","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"8.1"},{"value":9.1,"low":6.6,"high":9.1,"kind":"range","display":"6.6–9.1","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"6.6 - 9.1"},{"value":3.7,"low":null,"high":null,"kind":"point","display":"3.7","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"3.7"}]},{"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":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"29"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":39,"low":22,"high":39,"kind":"range","display":"22–39","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"22 - 39"},{"value":29,"low":null,"high":null,"kind":"point","display":"29","units":"ug/L","statisticType":"average","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:MWD Surface Water","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:MWD Surface Water","label":"MWD Surface Water","kind":"plant","units":"mg/L","average":{"value":0.7,"display":"0.7"},"range":{"low":0.6,"high":0.8,"display":"0.6–0.8"},"ratio":0.2},{"context":"plant:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"mg/L","average":{"value":0.22,"display":"0.22"},"range":{"low":0.16,"high":0.28,"display":"0.16–0.28"},"ratio":0.07}],"measurements":[{"value":0.22,"low":null,"high":null,"kind":"point","display":"0.22","units":"mg/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"0.22"},{"value":0.28,"low":0.16,"high":0.28,"kind":"range","display":"0.16–0.28","units":"mg/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"0.16 - 0.28"},{"value":0.8,"low":0.6,"high":0.8,"kind":"range","display":"0.6–0.8","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"0.6 - 0.8"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"0.7"}]},{"analyteId":"nitrate","name":"Nitrate","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":"14797-55-8","whatItIs":"A compound from fertilizer runoff, septic systems, and erosion of natural deposits.","whyItMatters":"Levels above the federal limit can cause 'blue baby syndrome,' a serious oxygen-transport condition in infants.","measured":{"value":2.8,"low":null,"high":null,"kind":"point","display":"2.8","units":"mg/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","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:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"mg/L","average":{"value":2.8,"display":"2.8"},"range":{"low":1.6,"high":4.3,"display":"1.6–4.3"},"ratio":0.43},{"context":"plant:MWD Surface Water","label":"MWD 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":4.3,"low":1.6,"high":4.3,"kind":"range","display":"1.6–4.3","units":"mg/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"1.6 - 4.3"},{"value":2.8,"low":null,"high":null,"kind":"point","display":"2.8","units":"mg/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"2.8"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD 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":0.15,"low":null,"high":null,"kind":"point","display":"0.15","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"0.15"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Surface Water","label":"MWD Surface Water","kind":"plant","units":"mg/L","average":{"value":0.15,"display":"0.15"},"range":{"low":0,"high":0.24,"display":"0–0.24"},"ratio":null},{"context":"plant:SFSWUA Groundwater","label":"SFSWUA 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,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"range","samplingContext":"plant:SFSWUA 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 Surface Water","rawVerbatim":"ND - 0.24"},{"value":0.15,"low":null,"high":null,"kind":"point","display":"0.15","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"0.15"}]},{"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,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","censored":true,"detectionLimit":2,"rawVerbatim":"<2"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":2.2,"display":"0–2.2"},"ratio":0.22},{"context":"plant:MWD Surface Water","label":"MWD 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":2.2,"low":0,"high":2.2,"kind":"range","display":"0–2.2","units":"ug/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"ND - 2.2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"<2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND"}]},{"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 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:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"mg/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":0.59,"display":"0–0.59"},"ratio":0.295},{"context":"plant:MWD Surface Water","label":"MWD 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}],"measurements":[{"value":0.59,"low":0,"high":0.59,"kind":"range","display":"0–0.59","units":"mg/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"ND - 0.59"},{"value":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"0.11"},{"value":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"0.11"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"<0.1"}]},{"analyteId":"calcium","name":"Calcium","family":"metal","familyLabel":"Metals","casrn":"7440-70-2","whatItIs":"A naturally occurring mineral that contributes to water hardness.","whyItMatters":"Not federally regulated for health; affects scaling and taste.","measured":{"value":79,"low":null,"high":null,"kind":"point","display":"79","units":"mg/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","censored":false,"detectionLimit":null,"rawVerbatim":"79"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"mg/L","average":{"value":79,"display":"79"},"range":{"low":62,"high":94,"display":"62–94"},"ratio":null},{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"mg/L","average":{"value":67,"display":"67"},"range":{"low":64,"high":70,"display":"64–70"},"ratio":null}],"measurements":[{"value":67,"low":null,"high":null,"kind":"point","display":"67","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"67"},{"value":79,"low":null,"high":null,"kind":"point","display":"79","units":"mg/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"79"},{"value":70,"low":64,"high":70,"kind":"range","display":"64–70","units":"mg/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"64 - 70"},{"value":94,"low":62,"high":94,"kind":"range","display":"62–94","units":"mg/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"62 - 94"}]},{"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":0.47,"low":null,"high":null,"kind":"point","display":"0.47","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"0.47 (d)"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.47,"low":null,"high":null,"kind":"point","display":"0.47","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"0.47 (d)"}]},{"analyteId":"magnesium","name":"Magnesium","family":"metal","familyLabel":"Metals","casrn":"7439-95-4","whatItIs":"A naturally occurring mineral that contributes to water hardness.","whyItMatters":"Not federally regulated for health; affects scaling and taste.","measured":{"value":26,"low":null,"high":null,"kind":"point","display":"26","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","censored":false,"detectionLimit":null,"rawVerbatim":"26"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"mg/L","average":{"value":26,"display":"26"},"range":{"low":25,"high":26,"display":"25–26"},"ratio":null},{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"mg/L","average":{"value":15,"display":"15"},"range":{"low":12,"high":17,"display":"12–17"},"ratio":null}],"measurements":[{"value":17,"low":12,"high":17,"kind":"range","display":"12–17","units":"mg/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"12 - 17"},{"value":26,"low":25,"high":26,"kind":"range","display":"25–26","units":"mg/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"25 - 26"},{"value":15,"low":null,"high":null,"kind":"point","display":"15","units":"mg/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"15"},{"value":26,"low":null,"high":null,"kind":"point","display":"26","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"26"}]},{"analyteId":"manganese","name":"Manganese","family":"metal","familyLabel":"Metals","casrn":"7439-96-5","whatItIs":"A naturally occurring metal from soil and rock.","whyItMatters":"No enforceable federal limit; high levels stain fixtures and laundry and can affect taste, with a health advisory for infants.","measured":{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"2"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Surface Water","label":"MWD Surface Water","kind":"plant","units":"ug/L","average":{"value":2,"display":"2"},"range":{"low":null,"high":null,"display":"2"},"ratio":null},{"context":"plant:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"ug/L","average":{"value":0.89,"display":"0.89"},"range":{"low":0.67,"high":1.1,"display":"0.67–1.1"},"ratio":null}],"measurements":[{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"2"},{"value":0.89,"low":null,"high":null,"kind":"point","display":"0.89","units":"ug/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"0.89"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"2"},{"value":1.1,"low":0.67,"high":1.1,"kind":"range","display":"0.67–1.1","units":"ug/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"0.67 - 1.1"}]},{"analyteId":"sodium","name":"Sodium","family":"metal","familyLabel":"Metals","casrn":"7440-23-5","whatItIs":"A naturally occurring salt component.","whyItMatters":"Not federally regulated for health; relevant for people on sodium-restricted diets.","measured":{"value":98,"low":null,"high":null,"kind":"point","display":"98","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","censored":false,"detectionLimit":null,"rawVerbatim":"98"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"mg/L","average":{"value":98,"display":"98"},"range":{"low":95,"high":100,"display":"95–100"},"ratio":null},{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"mg/L","average":{"value":71,"display":"71"},"range":{"low":61,"high":77,"display":"61–77"},"ratio":null}],"measurements":[{"value":71,"low":null,"high":null,"kind":"point","display":"71","units":"mg/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"71"},{"value":77,"low":61,"high":77,"kind":"range","display":"61–77","units":"mg/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"61 - 77"},{"value":100,"low":95,"high":100,"kind":"range","display":"95–100","units":"mg/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"95 - 100"},{"value":98,"low":null,"high":null,"kind":"point","display":"98","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"98"}]}]},{"family":"other","familyLabel":"Other","contaminants":[{"analyteId":"chlorine_total","name":"Chlorine Total","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":1.7,"low":null,"high":null,"kind":"point","display":"1.7","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"1.7"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":2.4,"low":0.08,"high":2.4,"kind":"range","display":"0.08–2.4","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.08 - 2.4"},{"value":1.7,"low":null,"high":null,"kind":"point","display":"1.7","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"1.7"}]}]},{"family":"pfas","familyLabel":"PFAS (\"forever chemicals\")","contaminants":[{"analyteId":"pfbs","name":"Perfluorobutanesulfonic acid","family":"pfas","familyLabel":"PFAS (\"forever chemicals\")","casrn":"375-73-5","whatItIs":"Perfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.'","whyItMatters":"Has no standalone limit but is part of the EPA PFAS Hazard Index that limits PFAS in combination.","measured":{"value":5.5,"low":null,"high":null,"kind":"point","display":"5.5","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","censored":false,"detectionLimit":null,"rawVerbatim":"5.5"},"federalStandard":{"type":"NL","value":500,"units":"ng/L","enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"ng/L","average":{"value":5.5,"display":"5.5"},"range":{"low":0,"high":9,"display":"0–9"},"ratio":null},{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":null}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"},{"value":5.5,"low":null,"high":null,"kind":"point","display":"5.5","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"5.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"},{"value":9,"low":0,"high":9,"kind":"range","display":"0–9","units":"ng/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"ND - 9"}]},{"analyteId":"pfhxa","name":"Perfluorohexanoic acid","family":"pfas","familyLabel":"PFAS (\"forever chemicals\")","casrn":"307-24-4","whatItIs":"Perfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.'","whyItMatters":"Monitored under EPA rules; persistent and widely detected.","measured":{"value":4.9,"low":null,"high":null,"kind":"point","display":"4.9","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","censored":false,"detectionLimit":null,"rawVerbatim":"4.9"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"ng/L","average":{"value":4.9,"display":"4.9"},"range":{"low":0,"high":9,"display":"0–9"},"ratio":null},{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":null}],"measurements":[{"value":4.9,"low":null,"high":null,"kind":"point","display":"4.9","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"4.9"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"},{"value":9,"low":0,"high":9,"kind":"range","display":"0–9","units":"ng/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"ND - 9"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"}]},{"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":9.2,"low":null,"high":null,"kind":"point","display":"9.2","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","censored":false,"detectionLimit":null,"rawVerbatim":"9.2"},"federalStandard":{"type":"NL","value":5.1,"units":"ng/L","enforceable":false},"status":{"key":"over","label":"At or above the limit"},"breakdowns":[{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"ng/L","average":{"value":9.2,"display":"9.2"},"range":{"low":6.9,"high":11,"display":"6.9–11"},"ratio":2.75},{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":11,"low":6.9,"high":11,"kind":"range","display":"6.9–11","units":"ng/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"6.9 - 11"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"},{"value":9.2,"low":null,"high":null,"kind":"point","display":"9.2","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"9.2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"}]},{"analyteId":"pfos","name":"PFOS","family":"pfas","familyLabel":"PFAS (\"forever chemicals\")","casrn":"1763-23-1","whatItIs":"Perfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings.","whyItMatters":"Linked to cancer, thyroid disease, and immune effects; the EPA set an enforceable limit of 4 parts per trillion.","measured":{"value":17,"low":null,"high":null,"kind":"point","display":"17","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","censored":false,"detectionLimit":null,"rawVerbatim":"17"},"federalStandard":{"type":"NL","value":6.5,"units":"ng/L","enforceable":false},"status":{"key":"over","label":"At or above the limit"},"breakdowns":[{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"ng/L","average":{"value":17,"display":"17"},"range":{"low":12,"high":26,"display":"12–26"},"ratio":6.5},{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":26,"low":12,"high":26,"kind":"range","display":"12–26","units":"ng/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"12 - 26"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"},{"value":17,"low":null,"high":null,"kind":"point","display":"17","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"17"}]}]},{"family":"physical_aggregate","familyLabel":"Physical & aggregate","contaminants":[{"analyteId":"alkalinity","name":"Alkalinity","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of the water's capacity to neutralize acids.","whyItMatters":"Not federally regulated for health; relevant to corrosion control and treatment.","measured":{"value":170,"low":null,"high":null,"kind":"point","display":"170","units":"mg/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","censored":false,"detectionLimit":null,"rawVerbatim":"170"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"mg/L","average":{"value":170,"display":"170"},"range":{"low":130,"high":180,"display":"130–180"},"ratio":null},{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"mg/L","average":{"value":130,"display":"130"},"range":{"low":120,"high":130,"display":"120–130"},"ratio":null}],"measurements":[{"value":130,"low":null,"high":null,"kind":"point","display":"130","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"130"},{"value":170,"low":null,"high":null,"kind":"point","display":"170","units":"mg/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"170"},{"value":180,"low":130,"high":180,"kind":"range","display":"130–180","units":"mg/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"130 - 180"},{"value":130,"low":120,"high":130,"kind":"range","display":"120–130","units":"mg/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"120 - 130"}]},{"analyteId":"hardness","name":"Hardness","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of dissolved calcium and magnesium minerals.","whyItMatters":"Not federally regulated for health; affects scaling, soap use, and taste.","measured":{"value":270,"low":null,"high":null,"kind":"point","display":"270","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","censored":false,"detectionLimit":null,"rawVerbatim":"270"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"mg/L","average":{"value":260,"display":"260"},"range":{"low":210,"high":300,"display":"210–300"},"ratio":null},{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"mg/L","average":{"value":270,"display":"270"},"range":{"low":null,"high":null,"display":"270"},"ratio":null}],"measurements":[{"value":260,"low":null,"high":null,"kind":"point","display":"260","units":"mg/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"260"},{"value":300,"low":210,"high":300,"kind":"range","display":"210–300","units":"mg/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"210 - 300"},{"value":270,"low":null,"high":null,"kind":"point","display":"270","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"270"},{"value":270,"low":null,"high":null,"kind":"point","display":"270","units":"mg/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"270"}]},{"analyteId":"ph","name":"pH","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of how acidic or basic the water is.","whyItMatters":"Regulated only as a secondary standard; very low or high pH can corrode pipes or affect taste.","measured":{"value":8.1,"low":null,"high":null,"kind":"point","display":"8.1","units":null,"statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","censored":false,"detectionLimit":null,"rawVerbatim":"8.1"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"","average":{"value":8.1,"display":"8.1"},"range":{"low":null,"high":null,"display":"8.1"},"ratio":null},{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"","average":{"value":7.1,"display":"7.1"},"range":{"low":7.1,"high":7.6,"display":"7.1–7.6"},"ratio":null}],"measurements":[{"value":7.6,"low":7.1,"high":7.6,"kind":"range","display":"7.1–7.6","units":null,"statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"7.1 - 7.6"},{"value":8.1,"low":null,"high":null,"kind":"point","display":"8.1","units":null,"statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"8.1"},{"value":8.1,"low":null,"high":null,"kind":"point","display":"8.1","units":null,"statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"8.1"},{"value":7.1,"low":null,"high":null,"kind":"point","display":"7.1","units":null,"statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"7.1"}]},{"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":0.03,"low":null,"high":null,"kind":"point","display":"0.03","units":null,"statisticType":"reported_level","samplingContext":"plant:Turbidity Measurements","censored":false,"detectionLimit":null,"rawVerbatim":"0.03"},"federalStandard":{"type":"TT","value":0.3,"units":null,"enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.03,"low":null,"high":null,"kind":"point","display":"0.03","units":null,"statisticType":"reported_level","samplingContext":"plant:Turbidity Measurements","rawVerbatim":"0.03"}]}]},{"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":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":{"type":"MCL","value":5,"units":"pCi/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWD Surface Water","label":"MWD Surface Water","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":1,"display":"0–1"},"ratio":0.2},{"context":"plant:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"ND"},{"value":1,"low":0,"high":1,"kind":"range","display":"0–1","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND - 1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","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":5,"low":null,"high":null,"kind":"point","display":"5","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"5"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":6,"low":0,"high":6,"kind":"range","display":"0–6","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND - 6"},{"value":5,"low":null,"high":null,"kind":"point","display":"5","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"5"}]},{"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":2,"low":null,"high":null,"kind":"point","display":"2","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"2"},"federalStandard":{"type":"MCL","value":20,"units":"pCi/L","enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Surface Water","label":"MWD Surface Water","kind":"plant","units":"pCi/L","average":{"value":2,"display":"2"},"range":{"low":1,"high":3,"display":"1–3"},"ratio":null},{"context":"plant:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"pCi/L","average":{"value":1.3,"display":"1.3"},"range":{"low":0,"high":2.3,"display":"0–2.3"},"ratio":null}],"measurements":[{"value":1.3,"low":null,"high":null,"kind":"point","display":"1.3","units":"pCi/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"1.3"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"2"},{"value":2.3,"low":0,"high":2.3,"kind":"range","display":"0–2.3","units":"pCi/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"ND - 2.3"},{"value":3,"low":1,"high":3,"kind":"range","display":"1–3","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"1 - 3"}]}]},{"family":"voc_pesticide","familyLabel":"VOCs & pesticides","contaminants":[{"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,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","censored":true,"detectionLimit":0.5,"rawVerbatim":"<0.5"},"federalStandard":{"type":"MCL","value":5,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":1.2,"display":"0–1.2"},"ratio":0.24},{"context":"plant:MWD Surface Water","label":"MWD 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":0,"high":1.2,"kind":"range","display":"0–1.2","units":"ug/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"ND - 1.2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND"}]}]}],"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":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":7,"low":0,"high":7,"kind":"range","display":"0–7","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND - 7"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND"}]},{"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":8.1,"low":null,"high":null,"kind":"point","display":"8.1","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"8.1"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":5.3,"low":3.9,"high":5.3,"kind":"range","display":"3.9–5.3","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"3.9 - 5.3"},{"value":7.4,"low":null,"high":null,"kind":"point","display":"7.4","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"7.4"},{"value":4.7,"low":3.3,"high":4.7,"kind":"range","display":"3.3–4.7","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"3.3 - 4.7"},{"value":4.3,"low":null,"high":null,"kind":"point","display":"4.3","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"4.3"},{"value":12,"low":3.9,"high":12,"kind":"range","display":"3.9–12","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"3.9 - 12"},{"value":8.1,"low":null,"high":null,"kind":"point","display":"8.1","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"8.1"},{"value":9.1,"low":6.6,"high":9.1,"kind":"range","display":"6.6–9.1","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"6.6 - 9.1"},{"value":3.7,"low":null,"high":null,"kind":"point","display":"3.7","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"3.7"}]},{"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":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"29"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":39,"low":22,"high":39,"kind":"range","display":"22–39","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"22 - 39"},{"value":29,"low":null,"high":null,"kind":"point","display":"29","units":"ug/L","statisticType":"average","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:MWD Surface Water","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:MWD Surface Water","label":"MWD Surface Water","kind":"plant","units":"mg/L","average":{"value":0.7,"display":"0.7"},"range":{"low":0.6,"high":0.8,"display":"0.6–0.8"},"ratio":0.2},{"context":"plant:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"mg/L","average":{"value":0.22,"display":"0.22"},"range":{"low":0.16,"high":0.28,"display":"0.16–0.28"},"ratio":0.07}],"measurements":[{"value":0.22,"low":null,"high":null,"kind":"point","display":"0.22","units":"mg/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"0.22"},{"value":0.28,"low":0.16,"high":0.28,"kind":"range","display":"0.16–0.28","units":"mg/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"0.16 - 0.28"},{"value":0.8,"low":0.6,"high":0.8,"kind":"range","display":"0.6–0.8","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"0.6 - 0.8"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"0.7"}]},{"analyteId":"nitrate","name":"Nitrate","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":"14797-55-8","whatItIs":"A compound from fertilizer runoff, septic systems, and erosion of natural deposits.","whyItMatters":"Levels above the federal limit can cause 'blue baby syndrome,' a serious oxygen-transport condition in infants.","measured":{"value":2.8,"low":null,"high":null,"kind":"point","display":"2.8","units":"mg/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","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:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"mg/L","average":{"value":2.8,"display":"2.8"},"range":{"low":1.6,"high":4.3,"display":"1.6–4.3"},"ratio":0.43},{"context":"plant:MWD Surface Water","label":"MWD 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":4.3,"low":1.6,"high":4.3,"kind":"range","display":"1.6–4.3","units":"mg/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"1.6 - 4.3"},{"value":2.8,"low":null,"high":null,"kind":"point","display":"2.8","units":"mg/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"2.8"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD 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":0.15,"low":null,"high":null,"kind":"point","display":"0.15","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"0.15"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Surface Water","label":"MWD Surface Water","kind":"plant","units":"mg/L","average":{"value":0.15,"display":"0.15"},"range":{"low":0,"high":0.24,"display":"0–0.24"},"ratio":null},{"context":"plant:SFSWUA Groundwater","label":"SFSWUA 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,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"range","samplingContext":"plant:SFSWUA 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 Surface Water","rawVerbatim":"ND - 0.24"},{"value":0.15,"low":null,"high":null,"kind":"point","display":"0.15","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"0.15"}]},{"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,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","censored":true,"detectionLimit":2,"rawVerbatim":"<2"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":2.2,"display":"0–2.2"},"ratio":0.22},{"context":"plant:MWD Surface Water","label":"MWD 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":2.2,"low":0,"high":2.2,"kind":"range","display":"0–2.2","units":"ug/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"ND - 2.2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"<2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND"}]},{"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 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:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"mg/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":0.59,"display":"0–0.59"},"ratio":0.295},{"context":"plant:MWD Surface Water","label":"MWD 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}],"measurements":[{"value":0.59,"low":0,"high":0.59,"kind":"range","display":"0–0.59","units":"mg/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"ND - 0.59"},{"value":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"mg/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"0.11"},{"value":0.11,"low":null,"high":null,"kind":"point","display":"0.11","units":"mg/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"0.11"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"mg/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"<0.1"}]},{"analyteId":"calcium","name":"Calcium","family":"metal","familyLabel":"Metals","casrn":"7440-70-2","whatItIs":"A naturally occurring mineral that contributes to water hardness.","whyItMatters":"Not federally regulated for health; affects scaling and taste.","measured":{"value":79,"low":null,"high":null,"kind":"point","display":"79","units":"mg/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","censored":false,"detectionLimit":null,"rawVerbatim":"79"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"mg/L","average":{"value":79,"display":"79"},"range":{"low":62,"high":94,"display":"62–94"},"ratio":null},{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"mg/L","average":{"value":67,"display":"67"},"range":{"low":64,"high":70,"display":"64–70"},"ratio":null}],"measurements":[{"value":67,"low":null,"high":null,"kind":"point","display":"67","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"67"},{"value":79,"low":null,"high":null,"kind":"point","display":"79","units":"mg/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"79"},{"value":70,"low":64,"high":70,"kind":"range","display":"64–70","units":"mg/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"64 - 70"},{"value":94,"low":62,"high":94,"kind":"range","display":"62–94","units":"mg/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"62 - 94"}]},{"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":0.47,"low":null,"high":null,"kind":"point","display":"0.47","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"0.47 (d)"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.47,"low":null,"high":null,"kind":"point","display":"0.47","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"0.47 (d)"}]},{"analyteId":"magnesium","name":"Magnesium","family":"metal","familyLabel":"Metals","casrn":"7439-95-4","whatItIs":"A naturally occurring mineral that contributes to water hardness.","whyItMatters":"Not federally regulated for health; affects scaling and taste.","measured":{"value":26,"low":null,"high":null,"kind":"point","display":"26","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","censored":false,"detectionLimit":null,"rawVerbatim":"26"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"mg/L","average":{"value":26,"display":"26"},"range":{"low":25,"high":26,"display":"25–26"},"ratio":null},{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"mg/L","average":{"value":15,"display":"15"},"range":{"low":12,"high":17,"display":"12–17"},"ratio":null}],"measurements":[{"value":17,"low":12,"high":17,"kind":"range","display":"12–17","units":"mg/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"12 - 17"},{"value":26,"low":25,"high":26,"kind":"range","display":"25–26","units":"mg/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"25 - 26"},{"value":15,"low":null,"high":null,"kind":"point","display":"15","units":"mg/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"15"},{"value":26,"low":null,"high":null,"kind":"point","display":"26","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"26"}]},{"analyteId":"manganese","name":"Manganese","family":"metal","familyLabel":"Metals","casrn":"7439-96-5","whatItIs":"A naturally occurring metal from soil and rock.","whyItMatters":"No enforceable federal limit; high levels stain fixtures and laundry and can affect taste, with a health advisory for infants.","measured":{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"2"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Surface Water","label":"MWD Surface Water","kind":"plant","units":"ug/L","average":{"value":2,"display":"2"},"range":{"low":null,"high":null,"display":"2"},"ratio":null},{"context":"plant:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"ug/L","average":{"value":0.89,"display":"0.89"},"range":{"low":0.67,"high":1.1,"display":"0.67–1.1"},"ratio":null}],"measurements":[{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"2"},{"value":0.89,"low":null,"high":null,"kind":"point","display":"0.89","units":"ug/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"0.89"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"2"},{"value":1.1,"low":0.67,"high":1.1,"kind":"range","display":"0.67–1.1","units":"ug/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"0.67 - 1.1"}]},{"analyteId":"sodium","name":"Sodium","family":"metal","familyLabel":"Metals","casrn":"7440-23-5","whatItIs":"A naturally occurring salt component.","whyItMatters":"Not federally regulated for health; relevant for people on sodium-restricted diets.","measured":{"value":98,"low":null,"high":null,"kind":"point","display":"98","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","censored":false,"detectionLimit":null,"rawVerbatim":"98"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"mg/L","average":{"value":98,"display":"98"},"range":{"low":95,"high":100,"display":"95–100"},"ratio":null},{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"mg/L","average":{"value":71,"display":"71"},"range":{"low":61,"high":77,"display":"61–77"},"ratio":null}],"measurements":[{"value":71,"low":null,"high":null,"kind":"point","display":"71","units":"mg/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"71"},{"value":77,"low":61,"high":77,"kind":"range","display":"61–77","units":"mg/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"61 - 77"},{"value":100,"low":95,"high":100,"kind":"range","display":"95–100","units":"mg/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"95 - 100"},{"value":98,"low":null,"high":null,"kind":"point","display":"98","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"98"}]},{"analyteId":"chlorine_total","name":"Chlorine Total","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":1.7,"low":null,"high":null,"kind":"point","display":"1.7","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"1.7"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":2.4,"low":0.08,"high":2.4,"kind":"range","display":"0.08–2.4","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.08 - 2.4"},{"value":1.7,"low":null,"high":null,"kind":"point","display":"1.7","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"1.7"}]},{"analyteId":"pfbs","name":"Perfluorobutanesulfonic acid","family":"pfas","familyLabel":"PFAS (\"forever chemicals\")","casrn":"375-73-5","whatItIs":"Perfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.'","whyItMatters":"Has no standalone limit but is part of the EPA PFAS Hazard Index that limits PFAS in combination.","measured":{"value":5.5,"low":null,"high":null,"kind":"point","display":"5.5","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","censored":false,"detectionLimit":null,"rawVerbatim":"5.5"},"federalStandard":{"type":"NL","value":500,"units":"ng/L","enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"ng/L","average":{"value":5.5,"display":"5.5"},"range":{"low":0,"high":9,"display":"0–9"},"ratio":null},{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":null}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"},{"value":5.5,"low":null,"high":null,"kind":"point","display":"5.5","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"5.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"},{"value":9,"low":0,"high":9,"kind":"range","display":"0–9","units":"ng/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"ND - 9"}]},{"analyteId":"pfhxa","name":"Perfluorohexanoic acid","family":"pfas","familyLabel":"PFAS (\"forever chemicals\")","casrn":"307-24-4","whatItIs":"Perfluorohexanoic acid, a shorter-chain PFAS 'forever chemical.'","whyItMatters":"Monitored under EPA rules; persistent and widely detected.","measured":{"value":4.9,"low":null,"high":null,"kind":"point","display":"4.9","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","censored":false,"detectionLimit":null,"rawVerbatim":"4.9"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"ng/L","average":{"value":4.9,"display":"4.9"},"range":{"low":0,"high":9,"display":"0–9"},"ratio":null},{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":null}],"measurements":[{"value":4.9,"low":null,"high":null,"kind":"point","display":"4.9","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"4.9"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"},{"value":9,"low":0,"high":9,"kind":"range","display":"0–9","units":"ng/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"ND - 9"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"}]},{"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":9.2,"low":null,"high":null,"kind":"point","display":"9.2","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","censored":false,"detectionLimit":null,"rawVerbatim":"9.2"},"federalStandard":{"type":"NL","value":5.1,"units":"ng/L","enforceable":false},"status":{"key":"over","label":"At or above the limit"},"breakdowns":[{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"ng/L","average":{"value":9.2,"display":"9.2"},"range":{"low":6.9,"high":11,"display":"6.9–11"},"ratio":2.75},{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":11,"low":6.9,"high":11,"kind":"range","display":"6.9–11","units":"ng/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"6.9 - 11"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"},{"value":9.2,"low":null,"high":null,"kind":"point","display":"9.2","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"9.2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"}]},{"analyteId":"pfos","name":"PFOS","family":"pfas","familyLabel":"PFAS (\"forever chemicals\")","casrn":"1763-23-1","whatItIs":"Perfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings.","whyItMatters":"Linked to cancer, thyroid disease, and immune effects; the EPA set an enforceable limit of 4 parts per trillion.","measured":{"value":17,"low":null,"high":null,"kind":"point","display":"17","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","censored":false,"detectionLimit":null,"rawVerbatim":"17"},"federalStandard":{"type":"NL","value":6.5,"units":"ng/L","enforceable":false},"status":{"key":"over","label":"At or above the limit"},"breakdowns":[{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"ng/L","average":{"value":17,"display":"17"},"range":{"low":12,"high":26,"display":"12–26"},"ratio":6.5},{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":26,"low":12,"high":26,"kind":"range","display":"12–26","units":"ng/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"12 - 26"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"ND"},{"value":17,"low":null,"high":null,"kind":"point","display":"17","units":"ng/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"17"}]},{"analyteId":"alkalinity","name":"Alkalinity","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of the water's capacity to neutralize acids.","whyItMatters":"Not federally regulated for health; relevant to corrosion control and treatment.","measured":{"value":170,"low":null,"high":null,"kind":"point","display":"170","units":"mg/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","censored":false,"detectionLimit":null,"rawVerbatim":"170"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"mg/L","average":{"value":170,"display":"170"},"range":{"low":130,"high":180,"display":"130–180"},"ratio":null},{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"mg/L","average":{"value":130,"display":"130"},"range":{"low":120,"high":130,"display":"120–130"},"ratio":null}],"measurements":[{"value":130,"low":null,"high":null,"kind":"point","display":"130","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"130"},{"value":170,"low":null,"high":null,"kind":"point","display":"170","units":"mg/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"170"},{"value":180,"low":130,"high":180,"kind":"range","display":"130–180","units":"mg/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"130 - 180"},{"value":130,"low":120,"high":130,"kind":"range","display":"120–130","units":"mg/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"120 - 130"}]},{"analyteId":"hardness","name":"Hardness","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of dissolved calcium and magnesium minerals.","whyItMatters":"Not federally regulated for health; affects scaling, soap use, and taste.","measured":{"value":270,"low":null,"high":null,"kind":"point","display":"270","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","censored":false,"detectionLimit":null,"rawVerbatim":"270"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"mg/L","average":{"value":260,"display":"260"},"range":{"low":210,"high":300,"display":"210–300"},"ratio":null},{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"mg/L","average":{"value":270,"display":"270"},"range":{"low":null,"high":null,"display":"270"},"ratio":null}],"measurements":[{"value":260,"low":null,"high":null,"kind":"point","display":"260","units":"mg/L","statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"260"},{"value":300,"low":210,"high":300,"kind":"range","display":"210–300","units":"mg/L","statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"210 - 300"},{"value":270,"low":null,"high":null,"kind":"point","display":"270","units":"mg/L","statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"270"},{"value":270,"low":null,"high":null,"kind":"point","display":"270","units":"mg/L","statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"270"}]},{"analyteId":"ph","name":"pH","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of how acidic or basic the water is.","whyItMatters":"Regulated only as a secondary standard; very low or high pH can corrode pipes or affect taste.","measured":{"value":8.1,"low":null,"high":null,"kind":"point","display":"8.1","units":null,"statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","censored":false,"detectionLimit":null,"rawVerbatim":"8.1"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:MWD SURFACE WATER","label":"MWD Surface Water","kind":"zone","units":"","average":{"value":8.1,"display":"8.1"},"range":{"low":null,"high":null,"display":"8.1"},"ratio":null},{"context":"zone:SFSWUA GROUNDWATER","label":"Sfswua Groundwater","kind":"zone","units":"","average":{"value":7.1,"display":"7.1"},"range":{"low":7.1,"high":7.6,"display":"7.1–7.6"},"ratio":null}],"measurements":[{"value":7.6,"low":7.1,"high":7.6,"kind":"range","display":"7.1–7.6","units":null,"statisticType":"range","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"7.1 - 7.6"},{"value":8.1,"low":null,"high":null,"kind":"point","display":"8.1","units":null,"statisticType":"range","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"8.1"},{"value":8.1,"low":null,"high":null,"kind":"point","display":"8.1","units":null,"statisticType":"average","samplingContext":"zone:MWD SURFACE WATER","rawVerbatim":"8.1"},{"value":7.1,"low":null,"high":null,"kind":"point","display":"7.1","units":null,"statisticType":"average","samplingContext":"zone:SFSWUA GROUNDWATER","rawVerbatim":"7.1"}]},{"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":0.03,"low":null,"high":null,"kind":"point","display":"0.03","units":null,"statisticType":"reported_level","samplingContext":"plant:Turbidity Measurements","censored":false,"detectionLimit":null,"rawVerbatim":"0.03"},"federalStandard":{"type":"TT","value":0.3,"units":null,"enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.03,"low":null,"high":null,"kind":"point","display":"0.03","units":null,"statisticType":"reported_level","samplingContext":"plant:Turbidity Measurements","rawVerbatim":"0.03"}]},{"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":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":{"type":"MCL","value":5,"units":"pCi/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:MWD Surface Water","label":"MWD Surface Water","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":1,"display":"0–1"},"ratio":0.2},{"context":"plant:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"ND"},{"value":1,"low":0,"high":1,"kind":"range","display":"0–1","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND - 1"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","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":5,"low":null,"high":null,"kind":"point","display":"5","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"5"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":6,"low":0,"high":6,"kind":"range","display":"0–6","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND - 6"},{"value":5,"low":null,"high":null,"kind":"point","display":"5","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"5"}]},{"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":2,"low":null,"high":null,"kind":"point","display":"2","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","censored":false,"detectionLimit":null,"rawVerbatim":"2"},"federalStandard":{"type":"MCL","value":20,"units":"pCi/L","enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:MWD Surface Water","label":"MWD Surface Water","kind":"plant","units":"pCi/L","average":{"value":2,"display":"2"},"range":{"low":1,"high":3,"display":"1–3"},"ratio":null},{"context":"plant:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"pCi/L","average":{"value":1.3,"display":"1.3"},"range":{"low":0,"high":2.3,"display":"0–2.3"},"ratio":null}],"measurements":[{"value":1.3,"low":null,"high":null,"kind":"point","display":"1.3","units":"pCi/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"1.3"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"pCi/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"2"},{"value":2.3,"low":0,"high":2.3,"kind":"range","display":"0–2.3","units":"pCi/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"ND - 2.3"},{"value":3,"low":1,"high":3,"kind":"range","display":"1–3","units":"pCi/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"1 - 3"}]},{"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,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","censored":true,"detectionLimit":0.5,"rawVerbatim":"<0.5"},"federalStandard":{"type":"MCL","value":5,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:SFSWUA Groundwater","label":"SFSWUA Groundwater","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":0,"high":1.2,"display":"0–1.2"},"ratio":0.24},{"context":"plant:MWD Surface Water","label":"MWD 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":0,"high":1.2,"kind":"range","display":"0–1.2","units":"ug/L","statisticType":"range","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"ND - 1.2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SFSWUA Groundwater","rawVerbatim":"<0.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:MWD Surface Water","rawVerbatim":"ND"}]}]}}