{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-06-04T01:44:13.926Z"},"system":{"slug":"ca__calipatria-state-prison__CA1310800","name":"Calipatria State Prison — Imperial, Ca","state":"CA","year":2021,"url":"https://www.thewatermap.com/water/ca/calipatria-state-prison-imperial-ca/2021","apiUrl":"https://www.thewatermap.com/api/water/ca/calipatria-state-prison-imperial-ca/2021","markdownUrl":"https://www.thewatermap.com/water/ca/calipatria-state-prison-imperial-ca/2021/llms.txt","coordinates":{"latitude":33.0305487,"longitude":-115.3595666},"contaminantsMeasured":10,"contaminantsWithFederalLimit":3,"contaminantsAtOrAboveLimit":0,"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":"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":2.5,"low":0,"high":2.5,"kind":"range","display":"0–2.5","units":"mg/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"ND-2.5"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":2.5,"low":0,"high":2.5,"kind":"range","display":"0–2.5","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND-2.5"},{"value":1.23,"low":null,"high":null,"kind":"point","display":"1.23","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"1.23"}]}]},{"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":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"ND-<2"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND-<2"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND-<2"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"2"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"2"}]},{"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":49,"low":17,"high":49,"kind":"range","display":"17–49","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"17-49"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":49,"low":17,"high":49,"kind":"range","display":"17–49","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"17-49"},{"value":24.5,"low":null,"high":null,"kind":"point","display":"24.5","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"24.5"},{"value":49,"low":17,"high":49,"kind":"range","display":"17–49","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"17-49"},{"value":24.5,"low":null,"high":null,"kind":"point","display":"24.5","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"24.5"}]}]},{"family":"metal","familyLabel":"Metals","contaminants":[{"analyteId":"calcium","name":"Calcium","family":"metal","familyLabel":"Metals","casrn":"7440-70-2","whatItIs":"A naturally occurring mineral that contributes to water hardness.","whyItMatters":"Not federally regulated for health; affects scaling and taste.","measured":{"value":88,"low":73,"high":88,"kind":"range","display":"73–88","units":"mg/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"73-88"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":81,"low":null,"high":null,"kind":"point","display":"81","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"81"},{"value":88,"low":73,"high":88,"kind":"range","display":"73–88","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"73-88"}]},{"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":0.31,"low":null,"high":null,"kind":"point","display":"0.31","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":".310"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.31,"low":null,"high":null,"kind":"point","display":"0.31","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":".310"}]},{"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":"non_detect","display":"Not detected","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"ND"},{"value":20,"low":null,"high":null,"kind":"point","display":"20","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of Samples Collected","rawVerbatim":"20"}]},{"analyteId":"sodium","name":"Sodium","family":"metal","familyLabel":"Metals","casrn":"7440-23-5","whatItIs":"A naturally occurring salt component.","whyItMatters":"Not federally regulated for health; relevant for people on sodium-restricted diets.","measured":{"value":120,"low":99,"high":120,"kind":"range","display":"99–120","units":"mg/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"99-120"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":120,"low":99,"high":120,"kind":"range","display":"99–120","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"99-120"},{"value":110,"low":null,"high":null,"kind":"point","display":"110","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"110"}]}]},{"family":"microbial","familyLabel":"Microbial","contaminants":[{"analyteId":"ecoli","name":"Escherichia coli (E. coli)","family":"microbial","familyLabel":"Microbial","casrn":null,"whatItIs":"Escherichia coli — bacteria found in the gut of humans and animals.","whyItMatters":"Its presence in drinking water indicates fecal contamination and a real risk of waterborne illness.","measured":{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","censored":false,"detectionLimit":null,"rawVerbatim":"0"},"federalStandard":{"type":"MCLG","value":0,"units":null,"enforceable":false},"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"0"}]}]},{"family":"physical_aggregate","familyLabel":"Physical & aggregate","contaminants":[{"analyteId":"alkalinity","name":"Alkalinity","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of the water's capacity to neutralize acids.","whyItMatters":"Not federally regulated for health; relevant to corrosion control and treatment.","measured":{"value":170,"low":140,"high":170,"kind":"range","display":"140–170","units":"mg/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"140-170"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":170,"low":140,"high":170,"kind":"range","display":"140–170","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"140-170"},{"value":150,"low":null,"high":null,"kind":"point","display":"150","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"150"}]},{"analyteId":"turbidity","name":"Turbidity","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of cloudiness from suspended particles in the water.","whyItMatters":"High turbidity can shelter microbes from disinfection; the EPA enforces it through a treatment-technique standard.","measured":{"value":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":null,"statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.2"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":null,"statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.2"}]}]}],"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":2.5,"low":0,"high":2.5,"kind":"range","display":"0–2.5","units":"mg/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"ND-2.5"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":2.5,"low":0,"high":2.5,"kind":"range","display":"0–2.5","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND-2.5"},{"value":1.23,"low":null,"high":null,"kind":"point","display":"1.23","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"1.23"}]},{"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":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"ND-<2"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND-<2"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND-<2"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"2"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"2"}]},{"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":49,"low":17,"high":49,"kind":"range","display":"17–49","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"17-49"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":49,"low":17,"high":49,"kind":"range","display":"17–49","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"17-49"},{"value":24.5,"low":null,"high":null,"kind":"point","display":"24.5","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"24.5"},{"value":49,"low":17,"high":49,"kind":"range","display":"17–49","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"17-49"},{"value":24.5,"low":null,"high":null,"kind":"point","display":"24.5","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"24.5"}]},{"analyteId":"calcium","name":"Calcium","family":"metal","familyLabel":"Metals","casrn":"7440-70-2","whatItIs":"A naturally occurring mineral that contributes to water hardness.","whyItMatters":"Not federally regulated for health; affects scaling and taste.","measured":{"value":88,"low":73,"high":88,"kind":"range","display":"73–88","units":"mg/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"73-88"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":81,"low":null,"high":null,"kind":"point","display":"81","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"81"},{"value":88,"low":73,"high":88,"kind":"range","display":"73–88","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"73-88"}]},{"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":0.31,"low":null,"high":null,"kind":"point","display":"0.31","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":".310"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.31,"low":null,"high":null,"kind":"point","display":"0.31","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":".310"}]},{"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":"non_detect","display":"Not detected","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"ND"},{"value":20,"low":null,"high":null,"kind":"point","display":"20","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of Samples Collected","rawVerbatim":"20"}]},{"analyteId":"sodium","name":"Sodium","family":"metal","familyLabel":"Metals","casrn":"7440-23-5","whatItIs":"A naturally occurring salt component.","whyItMatters":"Not federally regulated for health; relevant for people on sodium-restricted diets.","measured":{"value":120,"low":99,"high":120,"kind":"range","display":"99–120","units":"mg/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"99-120"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":120,"low":99,"high":120,"kind":"range","display":"99–120","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"99-120"},{"value":110,"low":null,"high":null,"kind":"point","display":"110","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"110"}]},{"analyteId":"ecoli","name":"Escherichia coli (E. coli)","family":"microbial","familyLabel":"Microbial","casrn":null,"whatItIs":"Escherichia coli — bacteria found in the gut of humans and animals.","whyItMatters":"Its presence in drinking water indicates fecal contamination and a real risk of waterborne illness.","measured":{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","censored":false,"detectionLimit":null,"rawVerbatim":"0"},"federalStandard":{"type":"MCLG","value":0,"units":null,"enforceable":false},"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"0"}]},{"analyteId":"alkalinity","name":"Alkalinity","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of the water's capacity to neutralize acids.","whyItMatters":"Not federally regulated for health; relevant to corrosion control and treatment.","measured":{"value":170,"low":140,"high":170,"kind":"range","display":"140–170","units":"mg/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"140-170"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":170,"low":140,"high":170,"kind":"range","display":"140–170","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"140-170"},{"value":150,"low":null,"high":null,"kind":"point","display":"150","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"150"}]},{"analyteId":"turbidity","name":"Turbidity","family":"physical_aggregate","familyLabel":"Physical & aggregate","casrn":null,"whatItIs":"A measure of cloudiness from suspended particles in the water.","whyItMatters":"High turbidity can shelter microbes from disinfection; the EPA enforces it through a treatment-technique standard.","measured":{"value":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":null,"statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.2"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":null,"statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.2"}]}]}}