{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-06-04T02:12:42.106Z"},"system":{"slug":"ca__california-domestic-water-company__CA1910199__2020","name":"California Domestic Water Company — Whittier, Ca","state":"CA","year":2020,"url":"https://www.thewatermap.com/water/ca/california-domestic-water-company-whittier-ca/2020","apiUrl":"https://www.thewatermap.com/api/water/ca/california-domestic-water-company-whittier-ca/2020","markdownUrl":"https://www.thewatermap.com/water/ca/california-domestic-water-company-whittier-ca/2020/llms.txt","coordinates":{"latitude":33.9749136,"longitude":-118.0338664},"contaminantsMeasured":20,"contaminantsWithFederalLimit":12,"contaminantsAtOrAboveLimit":3,"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":"disinfectant","familyLabel":"Disinfectants","contaminants":[{"analyteId":"chlorine","name":"Chlorine","family":"disinfectant","familyLabel":"Disinfectants","casrn":null,"whatItIs":"A disinfectant added to drinking water to kill bacteria and viruses.","whyItMatters":"Effective and necessary, but high residual levels can cause taste and odor issues; the EPA caps the residual disinfectant level.","measured":{"value":1.36,"low":null,"high":null,"kind":"point","display":"1.36","units":"mg/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","censored":false,"detectionLimit":null,"rawVerbatim":"Average 1.36"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"mg/L","average":{"value":1.36,"display":"1.36"},"range":{"low":0.86,"high":1.95,"display":"0.86–1.95"},"ratio":0.4875},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"mg/L","average":{"value":1.22,"display":"1.22"},"range":{"low":0.71,"high":1.55,"display":"0.71–1.55"},"ratio":0.3875}],"measurements":[{"value":1.55,"low":0.71,"high":1.55,"kind":"range","display":"0.71–1.55","units":"mg/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"Range 0.71-1.55"},{"value":1.36,"low":null,"high":null,"kind":"point","display":"1.36","units":"mg/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"Average 1.36"},{"value":1.95,"low":0.86,"high":1.95,"kind":"range","display":"0.86–1.95","units":"mg/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"Range 0.86-1.95"},{"value":1.22,"low":null,"high":null,"kind":"point","display":"1.22","units":"mg/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"Average 1.22"},{"value":1.22,"low":null,"high":null,"kind":"point","display":"1.22","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"1.22"}]}]},{"family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","contaminants":[{"analyteId":"chloroform","name":"Chloroform","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":"67-66-3","whatItIs":"A trihalomethane formed when chlorine reacts with organic matter in water.","whyItMatters":"A component of regulated total trihalomethanes; long-term exposure is linked to liver and kidney effects.","measured":{"value":0.38,"low":null,"high":null,"kind":"point","display":"0.38","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"0.38"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":0.38,"display":"0.38"},"range":{"low":0,"high":1.9,"display":"0–1.9"},"ratio":null},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":null},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/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":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":1.9,"low":0,"high":1.9,"kind":"range","display":"0–1.9","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-1.9"},{"value":0.38,"low":null,"high":null,"kind":"point","display":"0.38","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.38"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"}]},{"analyteId":"perchlorate","name":"Perchlorate","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":"14797-73-0","whatItIs":"A chemical used in rocket fuel and fireworks that can also form during disinfection.","whyItMatters":"Can interfere with thyroid hormone production; has no national enforceable limit but is regulated in some states.","measured":{"value":5.2,"low":null,"high":null,"kind":"point","display":"5.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"5.2"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":5.2,"display":"5.2"},"range":{"low":0.67,"high":16,"display":"0.67–16"},"ratio":null},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":1.9,"display":"1.9"},"range":{"low":0.57,"high":4.4,"display":"0.57–4.4"},"ratio":null},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/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":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":16,"low":0.67,"high":16,"kind":"range","display":"0.67–16","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.67-16"},{"value":5.2,"low":null,"high":null,"kind":"point","display":"5.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"5.2"},{"value":4.4,"low":0.57,"high":4.4,"kind":"range","display":"0.57–4.4","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.57-4.4"},{"value":1.9,"low":null,"high":null,"kind":"point","display":"1.9","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"1.9"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"}]},{"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":0.43,"low":null,"high":null,"kind":"point","display":"0.43","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"0.43"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":0.43,"display":"0.43"},"range":{"low":0,"high":1.9,"display":"0–1.9"},"ratio":0.02375},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":0.43,"low":null,"high":null,"kind":"point","display":"0.43","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.43"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":1.9,"low":0,"high":1.9,"kind":"range","display":"0–1.9","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-1.9"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"}]}]},{"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":0.38,"low":null,"high":null,"kind":"point","display":"0.38","units":"mg/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","censored":false,"detectionLimit":null,"rawVerbatim":"0.38"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"mg/L","average":{"value":0.38,"display":"0.38"},"range":{"low":0.35,"high":0.41,"display":"0.35–0.41"},"ratio":0.1025},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"mg/L","average":{"value":0.31,"display":"0.31"},"range":{"low":0.3,"high":0.32,"display":"0.3–0.32"},"ratio":0.08},{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"mg/L","average":{"value":0.3,"display":"0.3"},"range":{"low":0.28,"high":0.32,"display":"0.28–0.32"},"ratio":0.08}],"measurements":[{"value":0.41,"low":0.35,"high":0.41,"kind":"range","display":"0.35–0.41","units":"mg/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"0.35-0.41"},{"value":0.32,"low":0.3,"high":0.32,"kind":"range","display":"0.3–0.32","units":"mg/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.30-0.32"},{"value":0.31,"low":null,"high":null,"kind":"point","display":"0.31","units":"mg/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.31"},{"value":0.32,"low":0.28,"high":0.32,"kind":"range","display":"0.28–0.32","units":"mg/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.28-0.32"},{"value":0.3,"low":null,"high":null,"kind":"point","display":"0.3","units":"mg/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.30"},{"value":0.38,"low":null,"high":null,"kind":"point","display":"0.38","units":"mg/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"0.38"}]},{"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":3.9,"low":null,"high":null,"kind":"point","display":"3.9","units":"mg/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"3.9"},"federalStandard":{"type":"MCL","value":10,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"mg/L","average":{"value":3.9,"display":"3.9"},"range":{"low":1.6,"high":7.1,"display":"1.6–7.1"},"ratio":0.71},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"mg/L","average":{"value":3.6,"display":"3.6"},"range":{"low":3,"high":4.6,"display":"3–4.6"},"ratio":0.45999999999999996},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"mg/L","average":{"value":2.7,"display":"2.7"},"range":{"low":1.9,"high":3.5,"display":"1.9–3.5"},"ratio":0.35}],"measurements":[{"value":3.5,"low":1.9,"high":3.5,"kind":"range","display":"1.9–3.5","units":"mg/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"1.9-3.5"},{"value":7.1,"low":1.6,"high":7.1,"kind":"range","display":"1.6–7.1","units":"mg/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"1.6-7.1"},{"value":3.6,"low":null,"high":null,"kind":"point","display":"3.6","units":"mg/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"3.6"},{"value":2.7,"low":null,"high":null,"kind":"point","display":"2.7","units":"mg/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"2.7"},{"value":3.9,"low":null,"high":null,"kind":"point","display":"3.9","units":"mg/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"3.9"},{"value":4.6,"low":3,"high":4.6,"kind":"range","display":"3–4.6","units":"mg/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"3.0-4.6"}]}]},{"family":"metal","familyLabel":"Metals","contaminants":[{"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":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","censored":false,"detectionLimit":null,"rawVerbatim":"2"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":1.7,"display":"1.7"},"range":{"low":0,"high":2.9,"display":"0–2.9"},"ratio":0.29},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":2,"display":"2"},"range":{"low":0,"high":2.7,"display":"0–2.7"},"ratio":0.27},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":1.1,"display":"1.1"},"range":{"low":0,"high":2.2,"display":"0–2.2"},"ratio":0.22}],"measurements":[{"value":2.9,"low":0,"high":2.9,"kind":"range","display":"0–2.9","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-2.9"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"2"},{"value":2.2,"low":0,"high":2.2,"kind":"range","display":"0–2.2","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND-2.2"},{"value":1.1,"low":null,"high":null,"kind":"point","display":"1.1","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"1.1"},{"value":1.7,"low":null,"high":null,"kind":"point","display":"1.7","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"1.7"},{"value":2.7,"low":0,"high":2.7,"kind":"range","display":"0–2.7","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND-2.7"}]},{"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":0.132,"low":null,"high":null,"kind":"point","display":"0.132","units":"mg/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"0.132"},"federalStandard":{"type":"MCL","value":2,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"mg/L","average":{"value":0.13,"display":"0.13"},"range":{"low":0.12,"high":0.14,"display":"0.12–0.14"},"ratio":0.07},{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"mg/L","average":{"value":0.132,"display":"0.132"},"range":{"low":0.11,"high":0.115,"display":"0.11–0.115"},"ratio":0.066},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"mg/L","average":{"value":0.125,"display":"0.125"},"range":{"low":0.12,"high":0.13,"display":"0.12–0.13"},"ratio":0.065}],"measurements":[{"value":0.13,"low":null,"high":null,"kind":"point","display":"0.13","units":"mg/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"0.13"},{"value":0.125,"low":null,"high":null,"kind":"point","display":"0.125","units":"mg/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.125"},{"value":0.115,"low":0.11,"high":0.115,"kind":"range","display":"0.11–0.115","units":"mg/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.11-0.115"},{"value":0.13,"low":0.12,"high":0.13,"kind":"range","display":"0.12–0.13","units":"mg/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.12-0.13"},{"value":0.14,"low":0.12,"high":0.14,"kind":"range","display":"0.12–0.14","units":"mg/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"0.12-0.14"},{"value":0.132,"low":null,"high":null,"kind":"point","display":"0.132","units":"mg/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.132"}]},{"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":2.6,"low":null,"high":null,"kind":"point","display":"2.6","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","censored":false,"detectionLimit":null,"rawVerbatim":"2.6"},"federalStandard":{"type":"PHG","value":0.02,"units":"ug/L","enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":2.6,"display":"2.6"},"range":{"low":2.5,"high":2.6,"display":"2.5–2.6"},"ratio":null},{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":2.6,"display":"2.6"},"range":{"low":2.5,"high":2.6,"display":"2.5–2.6"},"ratio":null},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":null}],"measurements":[{"value":2.6,"low":null,"high":null,"kind":"point","display":"2.6","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"2.6"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":2.6,"low":null,"high":null,"kind":"point","display":"2.6","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"2.6"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":2.6,"low":2.5,"high":2.6,"kind":"range","display":"2.5–2.6","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"2.5-2.6"},{"value":2.6,"low":2.5,"high":2.6,"kind":"range","display":"2.5–2.6","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"2.5-2.6"}]}]},{"family":"other","familyLabel":"Other","contaminants":[{"analyteId":"carbon_tetrachloride","name":"Carbon Tetrachloride","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":400,"low":null,"high":null,"kind":"point","display":"400","units":"ng/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"400"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ng/L","average":{"value":400,"display":"400"},"range":null,"ratio":0.07999999999999999},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ng/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":"ng/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":400,"low":null,"high":null,"kind":"point","display":"400","units":"ng/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"400"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"}]},{"analyteId":"chromium","name":"Chromium","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":null,"status":{"key":"none","label":"None detected"},"breakdowns":[{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND"}]},{"analyteId":"cis_dichloroethylene_12","name":"Cis Dichloroethylene 12","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":1.44,"low":null,"high":null,"kind":"point","display":"1.44","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"1.44"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":1.44,"display":"1.44"},"range":{"low":0,"high":4.7,"display":"0–4.7"},"ratio":0.06714285714285714},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":1.44,"low":null,"high":null,"kind":"point","display":"1.44","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"1.44"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":4.7,"low":0,"high":4.7,"kind":"range","display":"0–4.7","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-4.7"}]},{"analyteId":"dichloroethylene_11","name":"Dichloroethylene 11","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":2.57,"low":null,"high":null,"kind":"point","display":"2.57","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"2.57"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":2.57,"display":"2.57"},"range":{"low":0,"high":7.4,"display":"0–7.4"},"ratio":1.0571428571428572},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":2.57,"low":null,"high":null,"kind":"point","display":"2.57","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"2.57"},{"value":7.4,"low":0,"high":7.4,"kind":"range","display":"0–7.4","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-7.4"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"}]},{"analyteId":"radium_226_228","name":"Radium 226 228","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":{"type":"MCL","value":5,"units":"pCi/L","enforceable":true},"status":{"key":"none","label":"None detected"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","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:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"}]}]},{"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":3.7,"low":null,"high":null,"kind":"point","display":"3.7","units":"ng/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"3.7"},"federalStandard":{"type":"NL","value":5.1,"units":"ng/L","enforceable":false},"status":{"key":"approaching","label":"Approaching the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ng/L","average":{"value":3.7,"display":"3.7"},"range":{"low":0,"high":13,"display":"0–13"},"ratio":3.25},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ng/L","average":{"value":0.4,"display":"0.4"},"range":{"low":0,"high":1.7,"display":"0–1.7"},"ratio":0.425},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":1.7,"low":0,"high":1.7,"kind":"range","display":"0–1.7","units":"ng/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND-1.7"},{"value":13,"low":0,"high":13,"kind":"range","display":"0–13","units":"ng/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-13"},{"value":0.4,"low":null,"high":null,"kind":"point","display":"0.4","units":"ng/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.4"},{"value":3.7,"low":null,"high":null,"kind":"point","display":"3.7","units":"ng/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"3.7"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased 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":9.2,"low":null,"high":null,"kind":"point","display":"9.2","units":"ng/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"9.2"},"federalStandard":{"type":"NL","value":6.5,"units":"ng/L","enforceable":false},"status":{"key":"over","label":"At or above the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ng/L","average":{"value":9.2,"display":"9.2"},"range":{"low":0,"high":35,"display":"0–35"},"ratio":8.75},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ng/L","average":{"value":2.5,"display":"2.5"},"range":{"low":2.1,"high":2.8,"display":"2.1–2.8"},"ratio":0.7},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":2.5,"low":null,"high":null,"kind":"point","display":"2.5","units":"ng/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"2.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":2.8,"low":2.1,"high":2.8,"kind":"range","display":"2.1–2.8","units":"ng/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"2.1-2.8"},{"value":35,"low":0,"high":35,"kind":"range","display":"0–35","units":"ng/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-35"},{"value":9.2,"low":null,"high":null,"kind":"point","display":"9.2","units":"ng/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"9.2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"}]}]},{"family":"radionuclide","familyLabel":"Radionuclides","contaminants":[{"analyteId":"gross_alpha","name":"Gross Alpha","family":"radionuclide","familyLabel":"Radionuclides","casrn":null,"whatItIs":"Gross alpha particle activity — a combined measure of alpha-emitting radioactive substances.","whyItMatters":"Long-term exposure above the federal limit increases cancer risk.","measured":{"value":3.09,"low":null,"high":null,"kind":"point","display":"3.09","units":"pCi/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","censored":false,"detectionLimit":null,"rawVerbatim":"3.09"},"federalStandard":{"type":"MCL","value":15,"units":"pCi/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"pCi/L","average":{"value":3.09,"display":"3.09"},"range":{"low":0,"high":4.95,"display":"0–4.95"},"ratio":0.33},{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"pCi/L","average":{"value":0.8,"display":"0.8"},"range":{"low":0,"high":3.3,"display":"0–3.3"},"ratio":0.22}],"measurements":[{"value":4.95,"low":0,"high":4.95,"kind":"range","display":"0–4.95","units":"pCi/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND-4.95"},{"value":0.8,"low":null,"high":null,"kind":"point","display":"0.8","units":"pCi/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.8"},{"value":3.3,"low":0,"high":3.3,"kind":"range","display":"0–3.3","units":"pCi/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-3.3"},{"value":3.09,"low":null,"high":null,"kind":"point","display":"3.09","units":"pCi/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"3.09"}]},{"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":3.54,"low":null,"high":null,"kind":"point","display":"3.54","units":"pCi/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","censored":false,"detectionLimit":null,"rawVerbatim":"3.54"},"federalStandard":{"type":"MCL","value":20,"units":"pCi/L","enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"pCi/L","average":{"value":3.54,"display":"3.54"},"range":{"low":1.2,"high":5.7,"display":"1.2–5.7"},"ratio":null},{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"pCi/L","average":{"value":2.7,"display":"2.7"},"range":{"low":2,"high":3.2,"display":"2–3.2"},"ratio":null}],"measurements":[{"value":5.7,"low":1.2,"high":5.7,"kind":"range","display":"1.2–5.7","units":"pCi/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"1.2-5.7"},{"value":3.2,"low":2,"high":3.2,"kind":"range","display":"2–3.2","units":"pCi/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"2-3.2"},{"value":3.54,"low":null,"high":null,"kind":"point","display":"3.54","units":"pCi/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"3.54"},{"value":2.7,"low":null,"high":null,"kind":"point","display":"2.7","units":"pCi/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"2.7"}]}]},{"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":16.2,"low":null,"high":null,"kind":"point","display":"16.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"16.2"},"federalStandard":{"type":"MCL","value":5,"units":"ug/L","enforceable":true},"status":{"key":"over","label":"At or above the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":16.2,"display":"16.2"},"range":{"low":0,"high":52,"display":"0–52"},"ratio":10.4},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":0.16,"display":"0.16"},"range":{"low":0,"high":0.82,"display":"0–0.82"},"ratio":0.16399999999999998},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0.16,"low":null,"high":null,"kind":"point","display":"0.16","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.16"},{"value":16.2,"low":null,"high":null,"kind":"point","display":"16.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"16.2"},{"value":52,"low":0,"high":52,"kind":"range","display":"0–52","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-52"},{"value":0.82,"low":0,"high":0.82,"kind":"range","display":"0–0.82","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND-0.82"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"}]},{"analyteId":"trichloroethylene","name":"Trichloroethylene","family":"voc_pesticide","familyLabel":"VOCs & pesticides","casrn":"79-01-6","whatItIs":"An industrial solvent (TCE) used in metal degreasing.","whyItMatters":"A known human carcinogen; long-term exposure above the federal limit can damage the liver.","measured":{"value":18.6,"low":null,"high":null,"kind":"point","display":"18.6","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"18.6"},"federalStandard":{"type":"MCL","value":5,"units":"ug/L","enforceable":true},"status":{"key":"over","label":"At or above the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":18.6,"display":"18.6"},"range":{"low":0,"high":71,"display":"0–71"},"ratio":14.2},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":0.7,"display":"0.7"},"range":{"low":0,"high":1.5,"display":"0–1.5"},"ratio":0.3},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":18.6,"low":null,"high":null,"kind":"point","display":"18.6","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"18.6"},{"value":71,"low":0,"high":71,"kind":"range","display":"0–71","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-71"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.70"},{"value":1.5,"low":0,"high":1.5,"kind":"range","display":"0–1.5","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND-1.5"}]}]}],"contaminants":[{"analyteId":"chlorine","name":"Chlorine","family":"disinfectant","familyLabel":"Disinfectants","casrn":null,"whatItIs":"A disinfectant added to drinking water to kill bacteria and viruses.","whyItMatters":"Effective and necessary, but high residual levels can cause taste and odor issues; the EPA caps the residual disinfectant level.","measured":{"value":1.36,"low":null,"high":null,"kind":"point","display":"1.36","units":"mg/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","censored":false,"detectionLimit":null,"rawVerbatim":"Average 1.36"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"mg/L","average":{"value":1.36,"display":"1.36"},"range":{"low":0.86,"high":1.95,"display":"0.86–1.95"},"ratio":0.4875},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"mg/L","average":{"value":1.22,"display":"1.22"},"range":{"low":0.71,"high":1.55,"display":"0.71–1.55"},"ratio":0.3875}],"measurements":[{"value":1.55,"low":0.71,"high":1.55,"kind":"range","display":"0.71–1.55","units":"mg/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"Range 0.71-1.55"},{"value":1.36,"low":null,"high":null,"kind":"point","display":"1.36","units":"mg/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"Average 1.36"},{"value":1.95,"low":0.86,"high":1.95,"kind":"range","display":"0.86–1.95","units":"mg/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"Range 0.86-1.95"},{"value":1.22,"low":null,"high":null,"kind":"point","display":"1.22","units":"mg/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"Average 1.22"},{"value":1.22,"low":null,"high":null,"kind":"point","display":"1.22","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"1.22"}]},{"analyteId":"chloroform","name":"Chloroform","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":"67-66-3","whatItIs":"A trihalomethane formed when chlorine reacts with organic matter in water.","whyItMatters":"A component of regulated total trihalomethanes; long-term exposure is linked to liver and kidney effects.","measured":{"value":0.38,"low":null,"high":null,"kind":"point","display":"0.38","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"0.38"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":0.38,"display":"0.38"},"range":{"low":0,"high":1.9,"display":"0–1.9"},"ratio":null},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":null},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/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":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":1.9,"low":0,"high":1.9,"kind":"range","display":"0–1.9","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-1.9"},{"value":0.38,"low":null,"high":null,"kind":"point","display":"0.38","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.38"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"}]},{"analyteId":"perchlorate","name":"Perchlorate","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":"14797-73-0","whatItIs":"A chemical used in rocket fuel and fireworks that can also form during disinfection.","whyItMatters":"Can interfere with thyroid hormone production; has no national enforceable limit but is regulated in some states.","measured":{"value":5.2,"low":null,"high":null,"kind":"point","display":"5.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"5.2"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":5.2,"display":"5.2"},"range":{"low":0.67,"high":16,"display":"0.67–16"},"ratio":null},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":1.9,"display":"1.9"},"range":{"low":0.57,"high":4.4,"display":"0.57–4.4"},"ratio":null},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/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":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":16,"low":0.67,"high":16,"kind":"range","display":"0.67–16","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.67-16"},{"value":5.2,"low":null,"high":null,"kind":"point","display":"5.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"5.2"},{"value":4.4,"low":0.57,"high":4.4,"kind":"range","display":"0.57–4.4","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.57-4.4"},{"value":1.9,"low":null,"high":null,"kind":"point","display":"1.9","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"1.9"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"}]},{"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":0.43,"low":null,"high":null,"kind":"point","display":"0.43","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"0.43"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":0.43,"display":"0.43"},"range":{"low":0,"high":1.9,"display":"0–1.9"},"ratio":0.02375},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":0.43,"low":null,"high":null,"kind":"point","display":"0.43","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.43"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":1.9,"low":0,"high":1.9,"kind":"range","display":"0–1.9","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-1.9"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"}]},{"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":0.38,"low":null,"high":null,"kind":"point","display":"0.38","units":"mg/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","censored":false,"detectionLimit":null,"rawVerbatim":"0.38"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"mg/L","average":{"value":0.38,"display":"0.38"},"range":{"low":0.35,"high":0.41,"display":"0.35–0.41"},"ratio":0.1025},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"mg/L","average":{"value":0.31,"display":"0.31"},"range":{"low":0.3,"high":0.32,"display":"0.3–0.32"},"ratio":0.08},{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"mg/L","average":{"value":0.3,"display":"0.3"},"range":{"low":0.28,"high":0.32,"display":"0.28–0.32"},"ratio":0.08}],"measurements":[{"value":0.41,"low":0.35,"high":0.41,"kind":"range","display":"0.35–0.41","units":"mg/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"0.35-0.41"},{"value":0.32,"low":0.3,"high":0.32,"kind":"range","display":"0.3–0.32","units":"mg/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.30-0.32"},{"value":0.31,"low":null,"high":null,"kind":"point","display":"0.31","units":"mg/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.31"},{"value":0.32,"low":0.28,"high":0.32,"kind":"range","display":"0.28–0.32","units":"mg/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.28-0.32"},{"value":0.3,"low":null,"high":null,"kind":"point","display":"0.3","units":"mg/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.30"},{"value":0.38,"low":null,"high":null,"kind":"point","display":"0.38","units":"mg/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"0.38"}]},{"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":3.9,"low":null,"high":null,"kind":"point","display":"3.9","units":"mg/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"3.9"},"federalStandard":{"type":"MCL","value":10,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"mg/L","average":{"value":3.9,"display":"3.9"},"range":{"low":1.6,"high":7.1,"display":"1.6–7.1"},"ratio":0.71},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"mg/L","average":{"value":3.6,"display":"3.6"},"range":{"low":3,"high":4.6,"display":"3–4.6"},"ratio":0.45999999999999996},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"mg/L","average":{"value":2.7,"display":"2.7"},"range":{"low":1.9,"high":3.5,"display":"1.9–3.5"},"ratio":0.35}],"measurements":[{"value":3.5,"low":1.9,"high":3.5,"kind":"range","display":"1.9–3.5","units":"mg/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"1.9-3.5"},{"value":7.1,"low":1.6,"high":7.1,"kind":"range","display":"1.6–7.1","units":"mg/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"1.6-7.1"},{"value":3.6,"low":null,"high":null,"kind":"point","display":"3.6","units":"mg/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"3.6"},{"value":2.7,"low":null,"high":null,"kind":"point","display":"2.7","units":"mg/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"2.7"},{"value":3.9,"low":null,"high":null,"kind":"point","display":"3.9","units":"mg/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"3.9"},{"value":4.6,"low":3,"high":4.6,"kind":"range","display":"3–4.6","units":"mg/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"3.0-4.6"}]},{"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":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","censored":false,"detectionLimit":null,"rawVerbatim":"2"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":1.7,"display":"1.7"},"range":{"low":0,"high":2.9,"display":"0–2.9"},"ratio":0.29},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":2,"display":"2"},"range":{"low":0,"high":2.7,"display":"0–2.7"},"ratio":0.27},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":1.1,"display":"1.1"},"range":{"low":0,"high":2.2,"display":"0–2.2"},"ratio":0.22}],"measurements":[{"value":2.9,"low":0,"high":2.9,"kind":"range","display":"0–2.9","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-2.9"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"2"},{"value":2.2,"low":0,"high":2.2,"kind":"range","display":"0–2.2","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND-2.2"},{"value":1.1,"low":null,"high":null,"kind":"point","display":"1.1","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"1.1"},{"value":1.7,"low":null,"high":null,"kind":"point","display":"1.7","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"1.7"},{"value":2.7,"low":0,"high":2.7,"kind":"range","display":"0–2.7","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND-2.7"}]},{"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":0.132,"low":null,"high":null,"kind":"point","display":"0.132","units":"mg/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"0.132"},"federalStandard":{"type":"MCL","value":2,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"mg/L","average":{"value":0.13,"display":"0.13"},"range":{"low":0.12,"high":0.14,"display":"0.12–0.14"},"ratio":0.07},{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"mg/L","average":{"value":0.132,"display":"0.132"},"range":{"low":0.11,"high":0.115,"display":"0.11–0.115"},"ratio":0.066},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"mg/L","average":{"value":0.125,"display":"0.125"},"range":{"low":0.12,"high":0.13,"display":"0.12–0.13"},"ratio":0.065}],"measurements":[{"value":0.13,"low":null,"high":null,"kind":"point","display":"0.13","units":"mg/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"0.13"},{"value":0.125,"low":null,"high":null,"kind":"point","display":"0.125","units":"mg/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.125"},{"value":0.115,"low":0.11,"high":0.115,"kind":"range","display":"0.11–0.115","units":"mg/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.11-0.115"},{"value":0.13,"low":0.12,"high":0.13,"kind":"range","display":"0.12–0.13","units":"mg/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.12-0.13"},{"value":0.14,"low":0.12,"high":0.14,"kind":"range","display":"0.12–0.14","units":"mg/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"0.12-0.14"},{"value":0.132,"low":null,"high":null,"kind":"point","display":"0.132","units":"mg/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.132"}]},{"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":2.6,"low":null,"high":null,"kind":"point","display":"2.6","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","censored":false,"detectionLimit":null,"rawVerbatim":"2.6"},"federalStandard":{"type":"PHG","value":0.02,"units":"ug/L","enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":2.6,"display":"2.6"},"range":{"low":2.5,"high":2.6,"display":"2.5–2.6"},"ratio":null},{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":2.6,"display":"2.6"},"range":{"low":2.5,"high":2.6,"display":"2.5–2.6"},"ratio":null},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":null}],"measurements":[{"value":2.6,"low":null,"high":null,"kind":"point","display":"2.6","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"2.6"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":2.6,"low":null,"high":null,"kind":"point","display":"2.6","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"2.6"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":2.6,"low":2.5,"high":2.6,"kind":"range","display":"2.5–2.6","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"2.5-2.6"},{"value":2.6,"low":2.5,"high":2.6,"kind":"range","display":"2.5–2.6","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"2.5-2.6"}]},{"analyteId":"carbon_tetrachloride","name":"Carbon Tetrachloride","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":400,"low":null,"high":null,"kind":"point","display":"400","units":"ng/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"400"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ng/L","average":{"value":400,"display":"400"},"range":null,"ratio":0.07999999999999999},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ng/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":"ng/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":400,"low":null,"high":null,"kind":"point","display":"400","units":"ng/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"400"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"}]},{"analyteId":"chromium","name":"Chromium","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":null,"status":{"key":"none","label":"None detected"},"breakdowns":[{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND"}]},{"analyteId":"cis_dichloroethylene_12","name":"Cis Dichloroethylene 12","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":1.44,"low":null,"high":null,"kind":"point","display":"1.44","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"1.44"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":1.44,"display":"1.44"},"range":{"low":0,"high":4.7,"display":"0–4.7"},"ratio":0.06714285714285714},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":1.44,"low":null,"high":null,"kind":"point","display":"1.44","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"1.44"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":4.7,"low":0,"high":4.7,"kind":"range","display":"0–4.7","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-4.7"}]},{"analyteId":"dichloroethylene_11","name":"Dichloroethylene 11","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":2.57,"low":null,"high":null,"kind":"point","display":"2.57","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"2.57"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":2.57,"display":"2.57"},"range":{"low":0,"high":7.4,"display":"0–7.4"},"ratio":1.0571428571428572},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":2.57,"low":null,"high":null,"kind":"point","display":"2.57","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"2.57"},{"value":7.4,"low":0,"high":7.4,"kind":"range","display":"0–7.4","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-7.4"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"}]},{"analyteId":"radium_226_228","name":"Radium 226 228","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":{"type":"MCL","value":5,"units":"pCi/L","enforceable":true},"status":{"key":"none","label":"None detected"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"pCi/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","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:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased 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":3.7,"low":null,"high":null,"kind":"point","display":"3.7","units":"ng/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"3.7"},"federalStandard":{"type":"NL","value":5.1,"units":"ng/L","enforceable":false},"status":{"key":"approaching","label":"Approaching the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ng/L","average":{"value":3.7,"display":"3.7"},"range":{"low":0,"high":13,"display":"0–13"},"ratio":3.25},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ng/L","average":{"value":0.4,"display":"0.4"},"range":{"low":0,"high":1.7,"display":"0–1.7"},"ratio":0.425},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":1.7,"low":0,"high":1.7,"kind":"range","display":"0–1.7","units":"ng/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND-1.7"},{"value":13,"low":0,"high":13,"kind":"range","display":"0–13","units":"ng/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-13"},{"value":0.4,"low":null,"high":null,"kind":"point","display":"0.4","units":"ng/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.4"},{"value":3.7,"low":null,"high":null,"kind":"point","display":"3.7","units":"ng/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"3.7"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased 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":9.2,"low":null,"high":null,"kind":"point","display":"9.2","units":"ng/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"9.2"},"federalStandard":{"type":"NL","value":6.5,"units":"ng/L","enforceable":false},"status":{"key":"over","label":"At or above the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ng/L","average":{"value":9.2,"display":"9.2"},"range":{"low":0,"high":35,"display":"0–35"},"ratio":8.75},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ng/L","average":{"value":2.5,"display":"2.5"},"range":{"low":2.1,"high":2.8,"display":"2.1–2.8"},"ratio":0.7},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ng/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":2.5,"low":null,"high":null,"kind":"point","display":"2.5","units":"ng/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"2.5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":2.8,"low":2.1,"high":2.8,"kind":"range","display":"2.1–2.8","units":"ng/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"2.1-2.8"},{"value":35,"low":0,"high":35,"kind":"range","display":"0–35","units":"ng/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-35"},{"value":9.2,"low":null,"high":null,"kind":"point","display":"9.2","units":"ng/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"9.2"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ng/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"}]},{"analyteId":"gross_alpha","name":"Gross Alpha","family":"radionuclide","familyLabel":"Radionuclides","casrn":null,"whatItIs":"Gross alpha particle activity — a combined measure of alpha-emitting radioactive substances.","whyItMatters":"Long-term exposure above the federal limit increases cancer risk.","measured":{"value":3.09,"low":null,"high":null,"kind":"point","display":"3.09","units":"pCi/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","censored":false,"detectionLimit":null,"rawVerbatim":"3.09"},"federalStandard":{"type":"MCL","value":15,"units":"pCi/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"pCi/L","average":{"value":3.09,"display":"3.09"},"range":{"low":0,"high":4.95,"display":"0–4.95"},"ratio":0.33},{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"pCi/L","average":{"value":0.8,"display":"0.8"},"range":{"low":0,"high":3.3,"display":"0–3.3"},"ratio":0.22}],"measurements":[{"value":4.95,"low":0,"high":4.95,"kind":"range","display":"0–4.95","units":"pCi/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND-4.95"},{"value":0.8,"low":null,"high":null,"kind":"point","display":"0.8","units":"pCi/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"0.8"},{"value":3.3,"low":0,"high":3.3,"kind":"range","display":"0–3.3","units":"pCi/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-3.3"},{"value":3.09,"low":null,"high":null,"kind":"point","display":"3.09","units":"pCi/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"3.09"}]},{"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":3.54,"low":null,"high":null,"kind":"point","display":"3.54","units":"pCi/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","censored":false,"detectionLimit":null,"rawVerbatim":"3.54"},"federalStandard":{"type":"MCL","value":20,"units":"pCi/L","enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"pCi/L","average":{"value":3.54,"display":"3.54"},"range":{"low":1.2,"high":5.7,"display":"1.2–5.7"},"ratio":null},{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"pCi/L","average":{"value":2.7,"display":"2.7"},"range":{"low":2,"high":3.2,"display":"2–3.2"},"ratio":null}],"measurements":[{"value":5.7,"low":1.2,"high":5.7,"kind":"range","display":"1.2–5.7","units":"pCi/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"1.2-5.7"},{"value":3.2,"low":2,"high":3.2,"kind":"range","display":"2–3.2","units":"pCi/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"2-3.2"},{"value":3.54,"low":null,"high":null,"kind":"point","display":"3.54","units":"pCi/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"3.54"},{"value":2.7,"low":null,"high":null,"kind":"point","display":"2.7","units":"pCi/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"2.7"}]},{"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":16.2,"low":null,"high":null,"kind":"point","display":"16.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"16.2"},"federalStandard":{"type":"MCL","value":5,"units":"ug/L","enforceable":true},"status":{"key":"over","label":"At or above the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":16.2,"display":"16.2"},"range":{"low":0,"high":52,"display":"0–52"},"ratio":10.4},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":0.16,"display":"0.16"},"range":{"low":0,"high":0.82,"display":"0–0.82"},"ratio":0.16399999999999998},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":0.16,"low":null,"high":null,"kind":"point","display":"0.16","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.16"},{"value":16.2,"low":null,"high":null,"kind":"point","display":"16.2","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"16.2"},{"value":52,"low":0,"high":52,"kind":"range","display":"0–52","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-52"},{"value":0.82,"low":0,"high":0.82,"kind":"range","display":"0–0.82","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND-0.82"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"}]},{"analyteId":"trichloroethylene","name":"Trichloroethylene","family":"voc_pesticide","familyLabel":"VOCs & pesticides","casrn":"79-01-6","whatItIs":"An industrial solvent (TCE) used in metal degreasing.","whyItMatters":"A known human carcinogen; long-term exposure above the federal limit can damage the liver.","measured":{"value":18.6,"low":null,"high":null,"kind":"point","display":"18.6","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","censored":false,"detectionLimit":null,"rawVerbatim":"18.6"},"federalStandard":{"type":"MCL","value":5,"units":"ug/L","enforceable":true},"status":{"key":"over","label":"At or above the limit"},"breakdowns":[{"context":"plant:Bassett Wellfield (Raw Groundwater)","label":"Bassett Wellfield (Raw Groundwater)","kind":"plant","units":"ug/L","average":{"value":18.6,"display":"18.6"},"range":{"low":0,"high":71,"display":"0–71"},"ratio":14.2},{"context":"zone:Distribution (Treated Water)","label":"Distribution (Treated Water)","kind":"zone","units":"ug/L","average":{"value":0.7,"display":"0.7"},"range":{"low":0,"high":1.5,"display":"0–1.5"},"ratio":0.3},{"context":"plant:SGVWC (Purchased Water)","label":"SGVWC (Purchased Water)","kind":"plant","units":"ug/L","average":{"value":0,"display":"Not detected"},"range":{"low":null,"high":null,"display":"Not detected"},"ratio":0}],"measurements":[{"value":18.6,"low":null,"high":null,"kind":"point","display":"18.6","units":"ug/L","statisticType":"average","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"18.6"},{"value":71,"low":0,"high":71,"kind":"range","display":"0–71","units":"ug/L","statisticType":"range","samplingContext":"plant:Bassett Wellfield (Raw Groundwater)","rawVerbatim":"ND-71"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"average","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"range","samplingContext":"plant:SGVWC (Purchased Water)","rawVerbatim":"ND"},{"value":0.7,"low":null,"high":null,"kind":"point","display":"0.7","units":"ug/L","statisticType":"average","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"0.70"},{"value":1.5,"low":0,"high":1.5,"kind":"range","display":"0–1.5","units":"ug/L","statisticType":"range","samplingContext":"zone:Distribution (Treated Water)","rawVerbatim":"ND-1.5"}]}]}}