{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-05-25T20:03:32.001Z"},"system":{"slug":"metro__234__thousand-oaks","name":"Thousand Oaks","state":"CA","year":2024,"url":"https://www.thewatermap.com/water/ca/thousand-oaks/2024","apiUrl":"https://www.thewatermap.com/api/water/ca/thousand-oaks/2024","markdownUrl":"https://www.thewatermap.com/water/ca/thousand-oaks/2024/llms.txt","coordinates":{"latitude":34.1705609,"longitude":-118.8375937},"contaminantsMeasured":31,"contaminantsWithFederalLimit":23,"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; 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the EPA has issued a health advisory level.","measured":{"value":0.28,"low":0.27,"high":0.28,"kind":"range","display":"0.27–0.28","units":"mg/L","statisticType":"reported_level","samplingContext":"plant:Calleguas LBWFP","censored":false,"detectionLimit":null,"rawVerbatim":"0.27 - 0.28"},"federalStandard":{"type":"NL","value":1,"units":"mg/L","enforceable":false},"status":{"key":"under","label":"Within the limit"},"breakdowns":[{"context":"plant:Calleguas LBWFP","label":"Calleguas LBWFP","kind":"plant","units":"mg/L","average":null,"range":null,"ratio":0.28},{"context":"plant:MWD Jensen Plant","label":"MWD Jensen Plant","kind":"plant","units":"mg/L","average":null,"range":null,"ratio":0.17}],"measurements":[{"value":0.17,"low":null,"high":null,"kind":"point","display":"0.17","units":"mg/L","statisticType":"reported_level","samplingContext":"plant:MWD Jensen Plant","rawVerbatim":"0.17"},{"value":0.28,"low":0.27,"high":0.28,"kind":"range","display":"0.27–0.28","units":"mg/L","statisticType":"reported_level","samplingContext":"plant:Calleguas LBWFP","rawVerbatim":"0.27 - 0.28"}]},{"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; 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