{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-06-13T07:57:03.938Z"},"system":{"slug":"ca__city-of-dos-palos__CA2410002","name":"City of Dos Palos — Dos Palos, Ca","state":"CA","year":2023,"url":"https://www.thewatermap.com/water/ca/dos-palos-dos-palos-ca/2023","apiUrl":"https://www.thewatermap.com/api/water/ca/dos-palos-dos-palos-ca/2023","markdownUrl":"https://www.thewatermap.com/water/ca/dos-palos-dos-palos-ca/2023/llms.txt","coordinates":{"latitude":36.9860582,"longitude":-120.626572},"contaminantsMeasured":5,"contaminantsWithFederalLimit":1,"contaminantsAtOrAboveLimit":1,"contaminantsApproachingLimit":0,"source":{"type":"Consumer Confidence Report (CCR)","description":"Figures are transcribed from the water utility's own annual Consumer Confidence Report, cross-checked by a second model, and approved by a person before publishing."},"families":[{"family":"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":4.3,"low":null,"high":null,"kind":"point","display":"4.3","units":"ug/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"4.3"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":4.3,"low":null,"high":null,"kind":"point","display":"4.3","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"4.3"}]},{"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":120,"low":null,"high":null,"kind":"point","display":"120","units":"ug/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"120"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":120,"low":null,"high":null,"kind":"point","display":"120","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"120"}]},{"analyteId":"chromium_hex","name":"Chromium, Hexavalent","family":"metal","familyLabel":"Metals","casrn":"18540-29-9","whatItIs":"Hexavalent chromium ('chromium-6') — the more toxic form of chromium.","whyItMatters":"A known carcinogen by inhalation; regulated nationally only within the total-chromium limit, with stricter limits in some states.","measured":{"value":0.089,"low":null,"high":null,"kind":"point","display":"0.089","units":"ug/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.089"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.089,"low":null,"high":null,"kind":"point","display":"0.089","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.089"}]},{"analyteId":"lead","name":"Lead","family":"metal","familyLabel":"Metals","casrn":null,"whatItIs":"A toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.","whyItMatters":"There is no safe level of lead; it harms brain development in children and raises blood pressure in adults. 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