{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-07-26T03:02:27.926Z"},"system":{"slug":"epa_sdwis_lcr__CA1900717__2022","name":"Casa Dulce Estates","state":"CA","year":2022,"url":"https://www.thewatermap.com/water/ca/casa-dulce-estates/2022","apiUrl":"https://www.thewatermap.com/api/water/ca/casa-dulce-estates/2022","markdownUrl":"https://www.thewatermap.com/water/ca/casa-dulce-estates/2022/llms.txt","coordinates":{"latitude":34.1588606629686,"longitude":-118.29904374745},"contaminantsMeasured":9,"contaminantsWithFederalLimit":6,"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":"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":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.2"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"0.2"},{"value":0.2,"low":0.2,"high":0.2,"kind":"range","display":"0.2–0.2","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.2 - 0.2"}]},{"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,"low":null,"high":null,"kind":"point","display":"3","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"3"},"federalStandard":{"type":"MCL","value":10,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"3"},{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"3.0"},{"value":3,"low":3,"high":3,"kind":"range","display":"3–3","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"3.0 - 3.0"}]}]},{"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":7,"low":null,"high":null,"kind":"point","display":"7","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"7"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":7,"low":null,"high":null,"kind":"point","display":"7","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"7"},{"value":7,"low":7,"high":7,"kind":"range","display":"7–7","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"7 - 7"}]},{"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":65,"low":null,"high":null,"kind":"point","display":"65","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"65"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":65,"low":null,"high":null,"kind":"point","display":"65","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"65"},{"value":65,"low":65,"high":65,"kind":"range","display":"65–65","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"65 - 65"}]},{"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. The EPA sets an action level, not a health goal above zero.","measured":{"value":0,"low":null,"high":null,"kind":"point","display":"0.0","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"lead 90th-percentile 0.0 mg/L (EPA SDWIS LCR, 1 round(s), 2022)"},"federalStandard":{"type":"AL","value":0.015,"units":"mg/L","enforceable":true},"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0.0","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"lead 90th-percentile 0.0 mg/L (EPA SDWIS LCR, 1 round(s), 2022)"}]},{"analyteId":"manganese","name":"Manganese","family":"metal","familyLabel":"Metals","casrn":"7439-96-5","whatItIs":"A naturally occurring metal from soil and rock.","whyItMatters":"No enforceable federal limit; high levels stain fixtures and laundry and can affect taste, with a health advisory for infants.","measured":{"value":20,"low":null,"high":null,"kind":"point","display":"20","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"20"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":20,"low":null,"high":null,"kind":"point","display":"20","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"20"},{"value":20,"low":20,"high":20,"kind":"range","display":"20–20","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"20 - 20"}]}]},{"family":"microbial","familyLabel":"Microbial","contaminants":[{"analyteId":"total_coliform","name":"Total Coliform","family":"microbial","familyLabel":"Microbial","casrn":null,"whatItIs":"A group of bacteria used as an indicator of overall water-system sanitation.","whyItMatters":"Coliforms themselves are usually harmless, but their presence signals that disease-causing organisms could enter the system.","measured":{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":null,"statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"2"},"federalStandard":{"type":"MCLG","value":0,"units":null,"enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":6,"low":null,"high":null,"kind":"point","display":"6","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"6/year (2023)"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":null,"statisticType":"average","samplingContext":"system","rawVerbatim":"2"},{"value":30.6,"low":1,"high":30.6,"kind":"range","display":"1–30.6","units":null,"statisticType":"range","samplingContext":"system","rawVerbatim":"1 - 30.6"}]}]},{"family":"other","familyLabel":"Other","contaminants":[{"analyteId":"nitrate_nitrite","name":"Nitrate Nitrite","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"3"},"federalStandard":{"type":"MCL","value":10,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"3"},{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"3.0"},{"value":3,"low":3,"high":3,"kind":"range","display":"3–3","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"3.0 - 3.0"}]}]},{"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":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"system","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":{"type":"MCL","value":15,"units":"pCi/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":1.28,"low":0,"high":1.28,"kind":"range","display":"0–1.28","units":"pCi/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND - 1.28"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"system","rawVerbatim":"ND"}]}]}],"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":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.2"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"0.2"},{"value":0.2,"low":0.2,"high":0.2,"kind":"range","display":"0.2–0.2","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.2 - 0.2"}]},{"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,"low":null,"high":null,"kind":"point","display":"3","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"3"},"federalStandard":{"type":"MCL","value":10,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"3"},{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"3.0"},{"value":3,"low":3,"high":3,"kind":"range","display":"3–3","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"3.0 - 3.0"}]},{"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":7,"low":null,"high":null,"kind":"point","display":"7","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"7"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":7,"low":null,"high":null,"kind":"point","display":"7","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"7"},{"value":7,"low":7,"high":7,"kind":"range","display":"7–7","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"7 - 7"}]},{"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":65,"low":null,"high":null,"kind":"point","display":"65","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"65"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":65,"low":null,"high":null,"kind":"point","display":"65","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"65"},{"value":65,"low":65,"high":65,"kind":"range","display":"65–65","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"65 - 65"}]},{"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. The EPA sets an action level, not a health goal above zero.","measured":{"value":0,"low":null,"high":null,"kind":"point","display":"0.0","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"lead 90th-percentile 0.0 mg/L (EPA SDWIS LCR, 1 round(s), 2022)"},"federalStandard":{"type":"AL","value":0.015,"units":"mg/L","enforceable":true},"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0.0","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"lead 90th-percentile 0.0 mg/L (EPA SDWIS LCR, 1 round(s), 2022)"}]},{"analyteId":"manganese","name":"Manganese","family":"metal","familyLabel":"Metals","casrn":"7439-96-5","whatItIs":"A naturally occurring metal from soil and rock.","whyItMatters":"No enforceable federal limit; high levels stain fixtures and laundry and can affect taste, with a health advisory for infants.","measured":{"value":20,"low":null,"high":null,"kind":"point","display":"20","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"20"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":20,"low":null,"high":null,"kind":"point","display":"20","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"20"},{"value":20,"low":20,"high":20,"kind":"range","display":"20–20","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"20 - 20"}]},{"analyteId":"total_coliform","name":"Total Coliform","family":"microbial","familyLabel":"Microbial","casrn":null,"whatItIs":"A group of bacteria used as an indicator of overall water-system sanitation.","whyItMatters":"Coliforms themselves are usually harmless, but their presence signals that disease-causing organisms could enter the system.","measured":{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":null,"statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"2"},"federalStandard":{"type":"MCLG","value":0,"units":null,"enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":6,"low":null,"high":null,"kind":"point","display":"6","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"6/year (2023)"},{"value":2,"low":null,"high":null,"kind":"point","display":"2","units":null,"statisticType":"average","samplingContext":"system","rawVerbatim":"2"},{"value":30.6,"low":1,"high":30.6,"kind":"range","display":"1–30.6","units":null,"statisticType":"range","samplingContext":"system","rawVerbatim":"1 - 30.6"}]},{"analyteId":"nitrate_nitrite","name":"Nitrate Nitrite","family":"other","familyLabel":"Other","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"3"},"federalStandard":{"type":"MCL","value":10,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"3"},{"value":3,"low":null,"high":null,"kind":"point","display":"3","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"3.0"},{"value":3,"low":3,"high":3,"kind":"range","display":"3–3","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"3.0 - 3.0"}]},{"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":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"system","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":{"type":"MCL","value":15,"units":"pCi/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":1.28,"low":0,"high":1.28,"kind":"range","display":"0–1.28","units":"pCi/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND - 1.28"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"average","samplingContext":"system","rawVerbatim":"ND"}]}]}}