{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-05-26T16:04:27.435Z"},"system":{"slug":"ca_sdwis_edt__CA1910213__2024","name":"Torrance-city, Water Dept.","state":"CA","year":2024,"url":"https://www.thewatermap.com/water/ca/torrance-city-water-dept/2024","apiUrl":"https://www.thewatermap.com/api/water/ca/torrance-city-water-dept/2024","markdownUrl":"https://www.thewatermap.com/water/ca/torrance-city-water-dept/2024/llms.txt","coordinates":{"latitude":33.8371392,"longitude":-118.3413606},"contaminantsMeasured":106,"contaminantsWithFederalLimit":67,"contaminantsAtOrAboveLimit":7,"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; 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high levels cause a salty taste and can corrode pipes.","measured":{"value":981.8571428571429,"low":null,"high":null,"kind":"point","display":"981.8571428571429","units":"MG/L","statisticType":"avg","samplingContext":"source","censored":false,"detectionLimit":null,"rawVerbatim":"avg over 70 samples (DL/2 substitution for 0 non-detects)"},"federalStandard":{"type":"mcl","value":500,"units":"MG/L","enforceable":true},"status":{"key":"over","label":"At or above the limit"},"breakdowns":[],"measurements":[{"value":981.8571428571429,"low":null,"high":null,"kind":"point","display":"981.8571428571429","units":"MG/L","statisticType":"avg","samplingContext":"source","rawVerbatim":"avg over 70 samples (DL/2 substitution for 0 non-detects)"},{"value":1300,"low":null,"high":null,"kind":"point","display":"1300","units":"MG/L","statisticType":"max_single","samplingContext":"source","rawVerbatim":"max detection 1300.0 MG/L on 2024-10-02 (70/70 samples detected)"},{"value":71.79452054794521,"low":null,"high":null,"kind":"point","display":"71.79452054794521","units":"MG/L","statisticType":"avg","samplingContext":"entry_point","rawVerbatim":"avg over 73 samples (DL/2 substitution for 0 non-detects)"},{"value":160,"low":null,"high":null,"kind":"point","display":"160","units":"MG/L","statisticType":"max_single","samplingContext":"entry_point","rawVerbatim":"max detection 160.0 MG/L on 2024-05-29 (73/73 samples detected)"}]},{"analyteId":"fluoride","name":"Fluoride","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":null,"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":0.27,"low":null,"high":null,"kind":"point","display":"0.27","units":"MG/L","statisticType":"avg","samplingContext":"source","censored":false,"detectionLimit":null,"rawVerbatim":"avg over 3 samples (DL/2 substitution for 0 non-detects)"},"federalStandard":{"type":"mcl","value":2,"units":"MG/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.36,"low":null,"high":null,"kind":"point","display":"0.36","units":"MG/L","statisticType":"max_single","samplingContext":"source","rawVerbatim":"max detection 0.36 MG/L on 2024-08-16 (3/3 samples detected)"},{"value":0.27,"low":null,"high":null,"kind":"point","display":"0.27","units":"MG/L","statisticType":"avg","samplingContext":"source","rawVerbatim":"avg over 3 samples (DL/2 substitution for 0 non-detects)"}]},{"analyteId":"nitrate","name":"Nitrate","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":null,"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":null,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"MG/L","statisticType":"max_single","samplingContext":"source","censored":true,"detectionLimit":0.2,"rawVerbatim":"all 5 samples below DL (0.2 MG/L)"},"federalStandard":{"type":"mcl","value":10,"units":"MG/L","enforceable":true},"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":null,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"MG/L","statisticType":"max_single","samplingContext":"source","rawVerbatim":"all 5 samples below DL (0.2 MG/L)"}]},{"analyteId":"sulfate","name":"Sulfate","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":null,"whatItIs":"A naturally occurring mineral from rock and soil.","whyItMatters":"No health-based federal limit; high levels can have a laxative effect and a bitter taste.","measured":{"value":249.7058823529412,"low":null,"high":null,"kind":"point","display":"249.7058823529412","units":"MG/L","statisticType":"avg","samplingContext":"source","censored":false,"detectionLimit":null,"rawVerbatim":"avg over 68 samples (DL/2 substitution for 0 non-detects)"},"federalStandard":{"type":"mcl","value":500,"units":"MG/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":28,"low":null,"high":null,"kind":"point","display":"28","units":"MG/L","statisticType":"max_single","samplingContext":"entry_point","rawVerbatim":"max detection 28.0 MG/L on 2024-05-22 (69/73 samples detected)"},{"value":340,"low":null,"high":null,"kind":"point","display":"340","units":"MG/L","statisticType":"max_single","samplingContext":"source","rawVerbatim":"max detection 340.0 MG/L on 2024-09-18 (68/68 samples detected)"},{"value":249.7058823529412,"low":null,"high":null,"kind":"point","display":"249.7058823529412","units":"MG/L","statisticType":"avg","samplingContext":"source","rawVerbatim":"avg over 68 samples (DL/2 substitution for 0 non-detects)"},{"value":11.333150684931507,"low":null,"high":null,"kind":"point","display":"11.333150684931507","units":"MG/L","statisticType":"avg","samplingContext":"entry_point","rawVerbatim":"avg over 73 samples (DL/2 substitution for 4 non-detects)"}]}]},{"family":"metal","familyLabel":"Metals","contaminants":[{"analyteId":"aluminum","name":"Aluminum","family":"metal","familyLabel":"Metals","casrn":"7429-90-5","whatItIs":"A common element sometimes used as a treatment coagulant.","whyItMatters":"Regulated only as a secondary (cosmetic) standard; 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long-term exposure is linked to skin, bladder, and lung cancer.","measured":{"value":1.4,"low":0,"high":1.4,"kind":"range","display":"0–1.4","units":"ug/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"ND–1.4"},"federalStandard":{"type":"MCL","value":10,"units":"ug/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.9,"low":null,"high":null,"kind":"point","display":"0.9","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.9"},{"value":1.4,"low":0,"high":1.4,"kind":"range","display":"0–1.4","units":"ug/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND–1.4"},{"value":0.5,"low":null,"high":null,"kind":"point","display":"0.5","units":"ug/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.5"}]},{"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":0.14,"low":0.07,"high":0.14,"kind":"range","display":"0.07–0.14","units":"mg/L","statisticType":"range","samplingContext":"system","censored":false,"detectionLimit":null,"rawVerbatim":"0.07–0.14"},"federalStandard":{"type":"MCL","value":1,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.14,"low":0.07,"high":0.14,"kind":"range","display":"0.07–0.14","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"0.07–0.14"},{"value":0.12,"low":0,"high":0.12,"kind":"range","display":"0–0.12","units":"mg/L","statisticType":"range","samplingContext":"system","rawVerbatim":"ND–0.12"},{"value":0.1,"low":null,"high":null,"kind":"point","display":"0.1","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.1"},{"value":0.12,"low":null,"high":null,"kind":"point","display":"0.12","units":"mg/L","statisticType":"reported_level","samplingContext":"system","rawVerbatim":"0.12"}]},{"analyteId":"calcium","name":"Calcium","family":"metal","familyLabel":"Metals","casrn":null,"whatItIs":"A naturally occurring mineral that contributes to water hardness.","whyItMatters":"Not federally regulated for health; 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