{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-05-26T08:02:25.623Z"},"system":{"slug":"ca_sdwis_edt__CA3010053__2024","name":"City of Huntington Beach","state":"CA","year":2024,"url":"https://www.thewatermap.com/water/ca/huntington-beach/2024","apiUrl":"https://www.thewatermap.com/api/water/ca/huntington-beach/2024","markdownUrl":"https://www.thewatermap.com/water/ca/huntington-beach/2024/llms.txt","coordinates":{"latitude":33.6783336,"longitude":-118.000016},"contaminantsMeasured":92,"contaminantsWithFederalLimit":50,"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":"disinfection_byproduct","familyLabel":"Disinfection byproducts","contaminants":[{"analyteId":"bromodichloromethane","name":"Bromodichloromethane","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":null,"whatItIs":"A trihalomethane disinfection byproduct.","whyItMatters":"Counted within regulated total trihalomethanes; 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affects scaling and taste.","measured":{"value":37.72666666666667,"low":null,"high":null,"kind":"point","display":"37.72666666666667","units":"MG/L","statisticType":"avg","samplingContext":"source","censored":false,"detectionLimit":null,"rawVerbatim":"avg over 15 samples (DL/2 substitution for 4 non-detects)"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":37.72666666666667,"low":null,"high":null,"kind":"point","display":"37.72666666666667","units":"MG/L","statisticType":"avg","samplingContext":"source","rawVerbatim":"avg over 15 samples (DL/2 substitution for 4 non-detects)"},{"value":73.5,"low":null,"high":null,"kind":"point","display":"73.5","units":"MG/L","statisticType":"max_single","samplingContext":"source","rawVerbatim":"max detection 73.5 MG/L on 2024-07-29 (11/15 samples detected)"}]},{"analyteId":"chromium_hex","name":"Chromium, Hexavalent","family":"metal","familyLabel":"Metals","casrn":null,"whatItIs":"Hexavalent chromium ('chromium-6') — the more toxic form of chromium.","whyItMatters":"A known carcinogen by inhalation; regulated nationally only within the total-chromium limit, with stricter limits in some states.","measured":{"value":0.164,"low":null,"high":null,"kind":"point","display":"0.164","units":"UG/L","statisticType":"avg","samplingContext":"source","censored":false,"detectionLimit":null,"rawVerbatim":"avg over 10 samples (DL/2 substitution for 5 non-detects)"},"federalStandard":{"type":"mcl","value":10,"units":"UG/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.4,"low":null,"high":null,"kind":"point","display":"0.4","units":"UG/L","statisticType":"max_single","samplingContext":"source","rawVerbatim":"max detection 0.4 UG/L on 2024-11-19 (5/10 samples detected)"},{"value":0.164,"low":null,"high":null,"kind":"point","display":"0.164","units":"UG/L","statisticType":"avg","samplingContext":"source","rawVerbatim":"avg over 10 samples (DL/2 substitution for 5 non-detects)"}]},{"analyteId":"copper","name":"Copper","family":"metal","familyLabel":"Metals","casrn":null,"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":240,"low":null,"high":null,"kind":"point","display":"240","units":"UG/L","statisticType":"p90","samplingContext":"distribution","censored":false,"detectionLimit":null,"rawVerbatim":"90th percentile of 51 LCR Tap samples"},"federalStandard":{"type":"al","value":1300,"units":"UG/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":360,"low":null,"high":null,"kind":"point","display":"360","units":"UG/L","statisticType":"max_single","samplingContext":"distribution","rawVerbatim":"max detection 360.0 UG/L on 2024-07-24 (51/51 samples detected)"},{"value":109.03921568627452,"low":null,"high":null,"kind":"point","display":"109.03921568627452","units":"UG/L","statisticType":"avg","samplingContext":"distribution","rawVerbatim":"avg over 51 samples (DL/2 substitution for 0 non-detects)"},{"value":240,"low":null,"high":null,"kind":"point","display":"240","units":"UG/L","statisticType":"p90","samplingContext":"distribution","rawVerbatim":"90th percentile of 51 LCR Tap samples"}]},{"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":0.23235294117647057,"low":null,"high":null,"kind":"point","display":"0.23235294117647057","units":"UG/L","statisticType":"avg","samplingContext":"distribution","censored":false,"detectionLimit":null,"rawVerbatim":"avg over 34 samples (DL/2 substitution for 33 non-detects)"},"federalStandard":null,"status":{"key":"detected","label":"Detected — no federal limit"},"breakdowns":[],"measurements":[{"value":0.23235294117647057,"low":null,"high":null,"kind":"point","display":"0.23235294117647057","units":"UG/L","statisticType":"avg","samplingContext":"distribution","rawVerbatim":"avg over 34 samples (DL/2 substitution for 33 non-detects)"},{"value":0.2,"low":null,"high":null,"kind":"point","display":"0.2","units":"UG/L","statisticType":"p90","samplingContext":"distribution","rawVerbatim":"90th percentile of 34 LCR Tap 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