{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-06-04T01:30:06.377Z"},"system":{"slug":"ca__reesedale-mutual__CA1900145","name":"Reesedale Mutual — Lancaster, Ca","state":"CA","year":2021,"url":"https://www.thewatermap.com/water/ca/reesedale-mutual-lancaster-ca/2021","apiUrl":"https://www.thewatermap.com/api/water/ca/reesedale-mutual-lancaster-ca/2021","markdownUrl":"https://www.thewatermap.com/water/ca/reesedale-mutual-lancaster-ca/2021/llms.txt","coordinates":{"latitude":34.6981064,"longitude":-118.1366153},"contaminantsMeasured":11,"contaminantsWithFederalLimit":9,"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":0.15,"low":null,"high":null,"kind":"point","display":"0.15","units":"mg/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":".15"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.15,"low":null,"high":null,"kind":"point","display":"0.15","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":".15"}]},{"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":0.67,"low":null,"high":null,"kind":"point","display":"0.67","units":"mg/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.67"},"federalStandard":{"type":"MCL","value":10,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.67,"low":null,"high":null,"kind":"point","display":"0.67","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.67"}]}]},{"family":"metal","familyLabel":"Metals","contaminants":[{"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":100,"low":null,"high":null,"kind":"point","display":"100","units":null,"statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"100"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":100,"low":null,"high":null,"kind":"point","display":"100","units":null,"statisticType":"reported_level","samplingContext":"system","rawVerbatim":"100"}]},{"analyteId":"boron","name":"Boron","family":"metal","familyLabel":"Metals","casrn":"7440-42-8","whatItIs":"A naturally occurring element from rock and soil.","whyItMatters":"No enforceable federal limit; the EPA has issued a health advisory level.","measured":{"value":100,"low":null,"high":null,"kind":"point","display":"100","units":"ug/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"100"},"federalStandard":{"type":"NL","value":100,"units":"ug/L","enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":100,"low":null,"high":null,"kind":"point","display":"100","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"100"}]},{"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":0.055,"low":null,"high":null,"kind":"point","display":"0.055","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"0.055"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.055,"low":null,"high":null,"kind":"point","display":"0.055","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"0.055"}]},{"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":5,"low":null,"high":null,"kind":"point","display":"5","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of Samples Collected","rawVerbatim":"5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"ND"}]},{"analyteId":"vanadium","name":"Vanadium","family":"metal","familyLabel":"Metals","casrn":"7440-62-2","whatItIs":null,"whyItMatters":null,"measured":{"value":5.6,"low":null,"high":null,"kind":"point","display":"5.6","units":"ug/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"5.6"},"federalStandard":{"type":"PHG","value":5,"units":"ug/L","enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":5.6,"low":null,"high":null,"kind":"point","display":"5.6","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"5.6"},{"value":5.6,"low":null,"high":null,"kind":"point","display":"5.6","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"5.6"}]}]},{"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":2021,"low":null,"high":null,"kind":"point","display":"2021","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","censored":false,"detectionLimit":null,"rawVerbatim":"2021 0"},"federalStandard":{"type":"MCLG","value":0,"units":null,"enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":2021,"low":null,"high":null,"kind":"point","display":"2021","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"2021 0"}]}]},{"family":"radionuclide","familyLabel":"Radionuclides","contaminants":[{"analyteId":"combined_radium","name":"Combined Radium","family":"radionuclide","familyLabel":"Radionuclides","casrn":null,"whatItIs":"Combined radium-226 and radium-228 — naturally occurring radioactive elements.","whyItMatters":"Long-term exposure above the federal limit increases the risk of bone cancer.","measured":{"value":1.65,"low":0.85,"high":1.65,"kind":"range","display":"0.85–1.65","units":null,"statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":".85-1.65"},"federalStandard":{"type":"MCL","value":5,"units":null,"enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.29,"low":null,"high":null,"kind":"point","display":"0.29","units":null,"statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.29"},{"value":0.88,"low":0,"high":0.88,"kind":"range","display":"0–0.88","units":null,"statisticType":"range","samplingContext":"system","rawVerbatim":"0-0.88"},{"value":1.16,"low":null,"high":null,"kind":"point","display":"1.16","units":null,"statisticType":"reported_level","samplingContext":"system","rawVerbatim":"1.16"},{"value":1.65,"low":0.85,"high":1.65,"kind":"range","display":"0.85–1.65","units":null,"statisticType":"range","samplingContext":"system","rawVerbatim":".85-1.65"}]},{"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":"reported_level","samplingContext":"system","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":{"type":"MCL","value":15,"units":"pCi/L","enforceable":true},"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"ND"}]},{"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":2.5,"low":2.3,"high":2.5,"kind":"range","display":"2.3–2.5","units":"pCi/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"2.3-2.5"},"federalStandard":{"type":"MCL","value":20,"units":"pCi/L","enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":2.5,"low":2.3,"high":2.5,"kind":"range","display":"2.3–2.5","units":"pCi/L","statisticType":"range","samplingContext":"system","rawVerbatim":"2.3-2.5"},{"value":2.36,"low":null,"high":null,"kind":"point","display":"2.36","units":"pCi/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"2.36"}]}]}],"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":0.15,"low":null,"high":null,"kind":"point","display":"0.15","units":"mg/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":".15"},"federalStandard":{"type":"MCL","value":4,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.15,"low":null,"high":null,"kind":"point","display":"0.15","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":".15"}]},{"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":0.67,"low":null,"high":null,"kind":"point","display":"0.67","units":"mg/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.67"},"federalStandard":{"type":"MCL","value":10,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.67,"low":null,"high":null,"kind":"point","display":"0.67","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.67"}]},{"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":100,"low":null,"high":null,"kind":"point","display":"100","units":null,"statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"100"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":100,"low":null,"high":null,"kind":"point","display":"100","units":null,"statisticType":"reported_level","samplingContext":"system","rawVerbatim":"100"}]},{"analyteId":"boron","name":"Boron","family":"metal","familyLabel":"Metals","casrn":"7440-42-8","whatItIs":"A naturally occurring element from rock and soil.","whyItMatters":"No enforceable federal limit; the EPA has issued a health advisory level.","measured":{"value":100,"low":null,"high":null,"kind":"point","display":"100","units":"ug/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"100"},"federalStandard":{"type":"NL","value":100,"units":"ug/L","enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":100,"low":null,"high":null,"kind":"point","display":"100","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"100"}]},{"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":0.055,"low":null,"high":null,"kind":"point","display":"0.055","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"0.055"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.055,"low":null,"high":null,"kind":"point","display":"0.055","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"0.055"}]},{"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":5,"low":null,"high":null,"kind":"point","display":"5","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of Samples Collected","rawVerbatim":"5"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"ND"}]},{"analyteId":"vanadium","name":"Vanadium","family":"metal","familyLabel":"Metals","casrn":"7440-62-2","whatItIs":null,"whyItMatters":null,"measured":{"value":5.6,"low":null,"high":null,"kind":"point","display":"5.6","units":"ug/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"5.6"},"federalStandard":{"type":"PHG","value":5,"units":"ug/L","enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":5.6,"low":null,"high":null,"kind":"point","display":"5.6","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"5.6"},{"value":5.6,"low":null,"high":null,"kind":"point","display":"5.6","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"5.6"}]},{"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":2021,"low":null,"high":null,"kind":"point","display":"2021","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","censored":false,"detectionLimit":null,"rawVerbatim":"2021 0"},"federalStandard":{"type":"MCLG","value":0,"units":null,"enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":2021,"low":null,"high":null,"kind":"point","display":"2021","units":null,"statisticType":"max_single","samplingContext":"plant:No. of Detections","rawVerbatim":"2021 0"}]},{"analyteId":"combined_radium","name":"Combined Radium","family":"radionuclide","familyLabel":"Radionuclides","casrn":null,"whatItIs":"Combined radium-226 and radium-228 — naturally occurring radioactive elements.","whyItMatters":"Long-term exposure above the federal limit increases the risk of bone cancer.","measured":{"value":1.65,"low":0.85,"high":1.65,"kind":"range","display":"0.85–1.65","units":null,"statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":".85-1.65"},"federalStandard":{"type":"MCL","value":5,"units":null,"enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.29,"low":null,"high":null,"kind":"point","display":"0.29","units":null,"statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.29"},{"value":0.88,"low":0,"high":0.88,"kind":"range","display":"0–0.88","units":null,"statisticType":"range","samplingContext":"system","rawVerbatim":"0-0.88"},{"value":1.16,"low":null,"high":null,"kind":"point","display":"1.16","units":null,"statisticType":"reported_level","samplingContext":"system","rawVerbatim":"1.16"},{"value":1.65,"low":0.85,"high":1.65,"kind":"range","display":"0.85–1.65","units":null,"statisticType":"range","samplingContext":"system","rawVerbatim":".85-1.65"}]},{"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":"reported_level","samplingContext":"system","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":{"type":"MCL","value":15,"units":"pCi/L","enforceable":true},"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"pCi/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"ND"}]},{"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":2.5,"low":2.3,"high":2.5,"kind":"range","display":"2.3–2.5","units":"pCi/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"2.3-2.5"},"federalStandard":{"type":"MCL","value":20,"units":"pCi/L","enforceable":true},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":2.5,"low":2.3,"high":2.5,"kind":"range","display":"2.3–2.5","units":"pCi/L","statisticType":"range","samplingContext":"system","rawVerbatim":"2.3-2.5"},{"value":2.36,"low":null,"high":null,"kind":"point","display":"2.36","units":"pCi/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"2.36"}]}]}}