{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-06-04T00:39:59.791Z"},"system":{"slug":"ca__rowland-water-district__CA1910194__2022","name":"Rowland Water District — Rowland Heights, Ca","state":"CA","year":2022,"url":"https://www.thewatermap.com/water/ca/rowland-water-district-rowland-heights-ca/2022","apiUrl":"https://www.thewatermap.com/api/water/ca/rowland-water-district-rowland-heights-ca/2022","markdownUrl":"https://www.thewatermap.com/water/ca/rowland-water-district-rowland-heights-ca/2022/llms.txt","coordinates":{"latitude":34.0018404,"longitude":-117.9305501},"contaminantsMeasured":22,"contaminantsWithFederalLimit":7,"contaminantsAtOrAboveLimit":2,"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":"bromate","name":"Bromate","family":"disinfection_byproduct","familyLabel":"Disinfection byproducts","casrn":"15541-45-4","whatItIs":"A disinfection byproduct formed when bromide-containing water is treated with ozone.","whyItMatters":"Classified as a probable human carcinogen; the EPA sets a strict maximum contaminant level.","measured":{"value":12,"low":0,"high":12,"kind":"range","display":"0–12","units":"ug/L","statisticType":"reported_level","samplingContext":"plant:Imported Surface Water Weymouth (MWD)","censored":false,"detectionLimit":null,"rawVerbatim":"ND - 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