{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-06-04T00:37:38.564Z"},"system":{"slug":"ca__foresthill-public-utility-dist__CA3110003","name":"Foresthill Public Utility Dist — Foresthill, Ca","state":"CA","year":2023,"url":"https://www.thewatermap.com/water/ca/foresthill-public-utility-dist-foresthill-ca/2023","apiUrl":"https://www.thewatermap.com/api/water/ca/foresthill-public-utility-dist-foresthill-ca/2023","markdownUrl":"https://www.thewatermap.com/water/ca/foresthill-public-utility-dist-foresthill-ca/2023/llms.txt","coordinates":{"latitude":39.0019935,"longitude":-120.8254018},"contaminantsMeasured":6,"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":"disinfection_byproduct","familyLabel":"Disinfection byproducts","contaminants":[{"analyteId":"haa5","name":"HAA5","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":null,"whatItIs":"Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.","whyItMatters":"Long-term exposure above the federal limit is associated with an increased cancer risk.","measured":{"value":15.6,"low":14.4,"high":15.6,"kind":"range","display":"14.4–15.6","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"14.4-15.6"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":15,"low":null,"high":null,"kind":"point","display":"15","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"15"},{"value":15.6,"low":14.4,"high":15.6,"kind":"range","display":"14.4–15.6","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"14.4-15.6"}]},{"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":18,"low":17,"high":18,"kind":"range","display":"17–18","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"17-18"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":18,"low":17,"high":18,"kind":"range","display":"17–18","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"17-18"},{"value":18,"low":null,"high":null,"kind":"point","display":"18","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"18"}]}]},{"family":"metal","familyLabel":"Metals","contaminants":[{"analyteId":"copper","name":"Copper","family":"metal","familyLabel":"Metals","casrn":"7440-50-8","whatItIs":"A metal that enters water from corroding household plumbing.","whyItMatters":"Short-term exposure causes stomach distress; long-term exposure can damage the liver and kidneys.","measured":{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"0.00"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"0.00"}]},{"analyteId":"lead","name":"Lead","family":"metal","familyLabel":"Metals","casrn":"7439-92-1","whatItIs":"A toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.","whyItMatters":"There is no safe level of lead; it harms brain development in children and raises blood pressure in adults. The EPA sets an action level, not a health goal above zero.","measured":{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"0.00"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":25,"low":null,"high":null,"kind":"point","display":"25","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of Samples Collected","rawVerbatim":"25"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"0.00"}]}]},{"family":"physical_aggregate","familyLabel":"Physical & aggregate","contaminants":[{"analyteId":"toc","name":"TOC","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"Total organic carbon — a measure of organic material dissolved in the water.","whyItMatters":"Not harmful itself, but it is the raw material that forms disinfection byproducts; removal is a treatment requirement.","measured":{"value":1.2,"low":null,"high":null,"kind":"point","display":"1.2","units":"mg/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"1.2"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":1.2,"low":null,"high":null,"kind":"point","display":"1.2","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"1.2"},{"value":1.2,"low":0.6,"high":1.2,"kind":"range","display":"0.6–1.2","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.6-1.2"}]},{"analyteId":"turbidity","name":"Turbidity","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of cloudiness from suspended particles in the water.","whyItMatters":"High turbidity can shelter microbes from disinfection; the EPA enforces it through a treatment-technique standard.","measured":{"value":1,"low":null,"high":null,"kind":"point","display":"1","units":"NTU","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"Turbidity of the filtered water must:\n1 – Be less than or equal to 0.1 NTU in 95% of measurements in a month.\n2 – Not exceed 1.0 NTU for more than eight consecutive hours.\n3 – Not exceed 5.0 NTU at any time."},"federalStandard":null,"status":{"key":"over","label":"At or above the limit"},"breakdowns":[],"measurements":[{"value":1,"low":null,"high":null,"kind":"point","display":"1","units":"NTU","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"Turbidity of the filtered water must:\n1 – Be less than or equal to 0.1 NTU in 95% of measurements in a month.\n2 – Not exceed 1.0 NTU for more than eight consecutive hours.\n3 – Not exceed 5.0 NTU at any time."},{"value":0.085,"low":null,"high":null,"kind":"point","display":"0.085","units":null,"statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.085 May 25, 2023"}]}]}],"contaminants":[{"analyteId":"haa5","name":"HAA5","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":null,"whatItIs":"Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter.","whyItMatters":"Long-term exposure above the federal limit is associated with an increased cancer risk.","measured":{"value":15.6,"low":14.4,"high":15.6,"kind":"range","display":"14.4–15.6","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"14.4-15.6"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":15,"low":null,"high":null,"kind":"point","display":"15","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"15"},{"value":15.6,"low":14.4,"high":15.6,"kind":"range","display":"14.4–15.6","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"14.4-15.6"}]},{"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":18,"low":17,"high":18,"kind":"range","display":"17–18","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"17-18"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":18,"low":17,"high":18,"kind":"range","display":"17–18","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"17-18"},{"value":18,"low":null,"high":null,"kind":"point","display":"18","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"18"}]},{"analyteId":"copper","name":"Copper","family":"metal","familyLabel":"Metals","casrn":"7440-50-8","whatItIs":"A metal that enters water from corroding household plumbing.","whyItMatters":"Short-term exposure causes stomach distress; long-term exposure can damage the liver and kidneys.","measured":{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"0.00"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"0.00"}]},{"analyteId":"lead","name":"Lead","family":"metal","familyLabel":"Metals","casrn":"7439-92-1","whatItIs":"A toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.","whyItMatters":"There is no safe level of lead; it harms brain development in children and raises blood pressure in adults. The EPA sets an action level, not a health goal above zero.","measured":{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"0.00"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":25,"low":null,"high":null,"kind":"point","display":"25","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of Samples Collected","rawVerbatim":"25"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"0.00"}]},{"analyteId":"toc","name":"TOC","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"Total organic carbon — a measure of organic material dissolved in the water.","whyItMatters":"Not harmful itself, but it is the raw material that forms disinfection byproducts; removal is a treatment requirement.","measured":{"value":1.2,"low":null,"high":null,"kind":"point","display":"1.2","units":"mg/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"1.2"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":1.2,"low":null,"high":null,"kind":"point","display":"1.2","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"1.2"},{"value":1.2,"low":0.6,"high":1.2,"kind":"range","display":"0.6–1.2","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.6-1.2"}]},{"analyteId":"turbidity","name":"Turbidity","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of cloudiness from suspended particles in the water.","whyItMatters":"High turbidity can shelter microbes from disinfection; the EPA enforces it through a treatment-technique standard.","measured":{"value":1,"low":null,"high":null,"kind":"point","display":"1","units":"NTU","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"Turbidity of the filtered water must:\n1 – Be less than or equal to 0.1 NTU in 95% of measurements in a month.\n2 – Not exceed 1.0 NTU for more than eight consecutive hours.\n3 – Not exceed 5.0 NTU at any time."},"federalStandard":null,"status":{"key":"over","label":"At or above the limit"},"breakdowns":[],"measurements":[{"value":1,"low":null,"high":null,"kind":"point","display":"1","units":"NTU","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"Turbidity of the filtered water must:\n1 – Be less than or equal to 0.1 NTU in 95% of measurements in a month.\n2 – Not exceed 1.0 NTU for more than eight consecutive hours.\n3 – Not exceed 5.0 NTU at any time."},{"value":0.085,"low":null,"high":null,"kind":"point","display":"0.085","units":null,"statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.085 May 25, 2023"}]}]}}