{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-06-04T03:11:36.803Z"},"system":{"slug":"ca__mckinleyville-c-s-d__CA1210016","name":"Mckinleyville C.s.d. — Mckinleyville, Ca","state":"CA","year":2022,"url":"https://www.thewatermap.com/water/ca/mckinleyville-c-s-d-mckinleyville-ca/2022","apiUrl":"https://www.thewatermap.com/api/water/ca/mckinleyville-c-s-d-mckinleyville-ca/2022","markdownUrl":"https://www.thewatermap.com/water/ca/mckinleyville-c-s-d-mckinleyville-ca/2022/llms.txt","coordinates":{"latitude":40.9675585,"longitude":-124.1032897},"contaminantsMeasured":9,"contaminantsWithFederalLimit":4,"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":0.56,"low":null,"high":null,"kind":"point","display":"0.56","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"Average=0.56"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.56,"low":null,"high":null,"kind":"point","display":"0.56","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"Average=0.56"},{"value":1,"low":0.3,"high":1,"kind":"range","display":"0.3–1","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.30-1.00"}]}]},{"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":8.1,"low":null,"high":null,"kind":"point","display":"8.1","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"8.1"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":4.84,"low":0,"high":4.84,"kind":"range","display":"0–4.84","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0-4.84"},{"value":4.84,"low":null,"high":null,"kind":"point","display":"4.84","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"4.84"},{"value":8.1,"low":null,"high":null,"kind":"point","display":"8.1","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"8.1"},{"value":8.92,"low":null,"high":null,"kind":"point","display":"8.92","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"8.92"},{"value":8.92,"low":0,"high":8.92,"kind":"range","display":"0–8.92","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0-8.92"},{"value":10,"low":0,"high":10,"kind":"range","display":"0–10","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0-10"}]},{"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":21,"low":null,"high":null,"kind":"point","display":"21","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"21"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":21,"low":null,"high":null,"kind":"point","display":"21","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"21"},{"value":22,"low":0,"high":22,"kind":"range","display":"0–22","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0-22"}]}]},{"family":"inorganic","familyLabel":"Inorganic chemicals","contaminants":[{"analyteId":"asbestos","name":"Asbestos","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":"1332-21-4","whatItIs":null,"whyItMatters":null,"measured":{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"range","samplingContext":"system","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":{"type":"MCL","value":7,"units":null,"enforceable":true},"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"range","samplingContext":"system","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"system","rawVerbatim":"ND"}]}]},{"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":0.994,"low":null,"high":null,"kind":"point","display":"0.994","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":".994"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.994,"low":null,"high":null,"kind":"point","display":"0.994","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":".994"}]},{"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":0.96,"low":null,"high":null,"kind":"point","display":"0.96","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":".96"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:No. of Samples Collected","label":"No. of Samples Collected","kind":"plant","units":"ug/L","average":null,"range":null,"ratio":2.1333333333333333},{"context":"plant:No. of Schools Requesting Lead Sampling","label":"No. of Schools Requesting Lead Sampling","kind":"plant","units":"ug/L","average":null,"range":null,"ratio":0.26666666666666666}],"measurements":[{"value":32,"low":null,"high":null,"kind":"point","display":"32","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of Samples Collected","rawVerbatim":"32"},{"value":4,"low":null,"high":null,"kind":"point","display":"4","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of Schools Requesting Lead Sampling","rawVerbatim":"A total of 4 Schools were tested for lead in 2019. Up to 3 samples collected per school"},{"value":0.96,"low":null,"high":null,"kind":"point","display":"0.96","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":".96"}]},{"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":0.44,"low":null,"high":null,"kind":"point","display":"0.44","units":"ug/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.44"},"federalStandard":{"type":"NL","value":500,"units":"ug/L","enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.44,"low":null,"high":null,"kind":"point","display":"0.44","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.44"},{"value":0.44,"low":null,"high":null,"kind":"point","display":"0.44","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.44"}]}]},{"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","samplingContext":"plant:No. of Detections","censored":false,"detectionLimit":null,"rawVerbatim":"(In the year) 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","samplingContext":"plant:No. of Detections","rawVerbatim":"(In the year) 0"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max","samplingContext":"plant:No. of Detections","rawVerbatim":"(In the year) 0"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max","samplingContext":"plant:No. of Detections","rawVerbatim":"(In the year) 0"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max","samplingContext":"plant:No. of Detections","rawVerbatim":"(In the year) 0"}]},{"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":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max","samplingContext":"plant:No. of Detections","censored":false,"detectionLimit":null,"rawVerbatim":"(In a month) 0"},"federalStandard":null,"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max","samplingContext":"plant:No. of Detections","rawVerbatim":"(In a month) 0"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max","samplingContext":"plant:No. of Detections","rawVerbatim":"(In a month) 0"}]}]}],"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":0.56,"low":null,"high":null,"kind":"point","display":"0.56","units":"mg/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"Average=0.56"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.56,"low":null,"high":null,"kind":"point","display":"0.56","units":"mg/L","statisticType":"average","samplingContext":"system","rawVerbatim":"Average=0.56"},{"value":1,"low":0.3,"high":1,"kind":"range","display":"0.3–1","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.30-1.00"}]},{"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":8.1,"low":null,"high":null,"kind":"point","display":"8.1","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"8.1"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":4.84,"low":0,"high":4.84,"kind":"range","display":"0–4.84","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0-4.84"},{"value":4.84,"low":null,"high":null,"kind":"point","display":"4.84","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"4.84"},{"value":8.1,"low":null,"high":null,"kind":"point","display":"8.1","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"8.1"},{"value":8.92,"low":null,"high":null,"kind":"point","display":"8.92","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"8.92"},{"value":8.92,"low":0,"high":8.92,"kind":"range","display":"0–8.92","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0-8.92"},{"value":10,"low":0,"high":10,"kind":"range","display":"0–10","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0-10"}]},{"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":21,"low":null,"high":null,"kind":"point","display":"21","units":"ug/L","statisticType":"average","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"21"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":21,"low":null,"high":null,"kind":"point","display":"21","units":"ug/L","statisticType":"average","samplingContext":"system","rawVerbatim":"21"},{"value":22,"low":0,"high":22,"kind":"range","display":"0–22","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0-22"}]},{"analyteId":"asbestos","name":"Asbestos","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":"1332-21-4","whatItIs":null,"whyItMatters":null,"measured":{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"range","samplingContext":"system","censored":true,"detectionLimit":null,"rawVerbatim":"ND"},"federalStandard":{"type":"MCL","value":7,"units":null,"enforceable":true},"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"range","samplingContext":"system","rawVerbatim":"ND"},{"value":0,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":null,"statisticType":"average","samplingContext":"system","rawVerbatim":"ND"}]},{"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":0.994,"low":null,"high":null,"kind":"point","display":"0.994","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":".994"},"federalStandard":{"type":"AL","value":1.3,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.994,"low":null,"high":null,"kind":"point","display":"0.994","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":".994"}]},{"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":0.96,"low":null,"high":null,"kind":"point","display":"0.96","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":".96"},"federalStandard":null,"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:No. of Samples Collected","label":"No. of Samples Collected","kind":"plant","units":"ug/L","average":null,"range":null,"ratio":2.1333333333333333},{"context":"plant:No. of Schools Requesting Lead Sampling","label":"No. of Schools Requesting Lead Sampling","kind":"plant","units":"ug/L","average":null,"range":null,"ratio":0.26666666666666666}],"measurements":[{"value":32,"low":null,"high":null,"kind":"point","display":"32","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of Samples Collected","rawVerbatim":"32"},{"value":4,"low":null,"high":null,"kind":"point","display":"4","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:No. of Schools Requesting Lead Sampling","rawVerbatim":"A total of 4 Schools were tested for lead in 2019. Up to 3 samples collected per school"},{"value":0.96,"low":null,"high":null,"kind":"point","display":"0.96","units":"ug/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":".96"}]},{"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":0.44,"low":null,"high":null,"kind":"point","display":"0.44","units":"ug/L","statisticType":"reported_level","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.44"},"federalStandard":{"type":"NL","value":500,"units":"ug/L","enforceable":false},"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.44,"low":null,"high":null,"kind":"point","display":"0.44","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.44"},{"value":0.44,"low":null,"high":null,"kind":"point","display":"0.44","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.44"}]},{"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","samplingContext":"plant:No. of Detections","censored":false,"detectionLimit":null,"rawVerbatim":"(In the year) 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","samplingContext":"plant:No. of Detections","rawVerbatim":"(In the year) 0"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max","samplingContext":"plant:No. of Detections","rawVerbatim":"(In the year) 0"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max","samplingContext":"plant:No. of Detections","rawVerbatim":"(In the year) 0"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max","samplingContext":"plant:No. of Detections","rawVerbatim":"(In the year) 0"}]},{"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":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max","samplingContext":"plant:No. of Detections","censored":false,"detectionLimit":null,"rawVerbatim":"(In a month) 0"},"federalStandard":null,"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max","samplingContext":"plant:No. of Detections","rawVerbatim":"(In a month) 0"},{"value":0,"low":null,"high":null,"kind":"point","display":"0","units":null,"statisticType":"max","samplingContext":"plant:No. of Detections","rawVerbatim":"(In a month) 0"}]}]}}