{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-06-04T01:21:29.758Z"},"system":{"slug":"ca__eureka-city-of__CA1210004","name":"Eureka, City of — Eureka, Ca","state":"CA","year":2023,"url":"https://www.thewatermap.com/water/ca/eureka-eureka-ca/2023","apiUrl":"https://www.thewatermap.com/api/water/ca/eureka-eureka-ca/2023","markdownUrl":"https://www.thewatermap.com/water/ca/eureka-eureka-ca/2023/llms.txt","coordinates":{"latitude":40.8018746,"longitude":-124.1707558},"contaminantsMeasured":15,"contaminantsWithFederalLimit":4,"contaminantsAtOrAboveLimit":1,"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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