{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-05-26T09:07:23.052Z"},"system":{"slug":"ca_sdwis_edt__CA3310009__2026","name":"Eastern Municipal Wd","state":"CA","year":2026,"url":"https://www.thewatermap.com/water/ca/eastern-municipal-wd/2026","apiUrl":"https://www.thewatermap.com/api/water/ca/eastern-municipal-wd/2026","markdownUrl":"https://www.thewatermap.com/water/ca/eastern-municipal-wd/2026/llms.txt","coordinates":{"latitude":33.6863987,"longitude":-117.1778599},"contaminantsMeasured":81,"contaminantsWithFederalLimit":40,"contaminantsAtOrAboveLimit":3,"contaminantsApproachingLimit":1,"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 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states.","measured":{"value":2.0615384615384618,"low":null,"high":null,"kind":"point","display":"2.0615384615384618","units":"UG/L","statisticType":"avg","samplingContext":"source","censored":false,"detectionLimit":null,"rawVerbatim":"avg over 13 samples (DL/2 substitution for 2 non-detects)"},"federalStandard":{"type":"mcl","value":6,"units":"UG/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":2.0615384615384618,"low":null,"high":null,"kind":"point","display":"2.0615384615384618","units":"UG/L","statisticType":"avg","samplingContext":"source","rawVerbatim":"avg over 13 samples (DL/2 substitution for 2 non-detects)"},{"value":0.5,"low":null,"high":null,"kind":"point","display":"0.5","units":"UG/L","statisticType":"max_single","samplingContext":"entry_point","rawVerbatim":"max detection 0.5 UG/L on 2026-03-02 (1/6 samples 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non-detects)"},{"value":51,"low":null,"high":null,"kind":"point","display":"51","units":"UG/L","statisticType":"avg","samplingContext":"entry_point","rawVerbatim":"avg over 6 samples (DL/2 substitution for 0 non-detects)"},{"value":53,"low":null,"high":null,"kind":"point","display":"53","units":"UG/L","statisticType":"max_single","samplingContext":"distribution","rawVerbatim":"max detection 53.0 UG/L on 2026-03-18 (14/14 samples detected)"}]}]},{"family":"inorganic","familyLabel":"Inorganic chemicals","contaminants":[{"analyteId":"chloride","name":"Chloride","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":null,"whatItIs":"A naturally occurring salt compound.","whyItMatters":"Regulated only as a secondary (cosmetic) standard; high levels cause a salty taste and can corrode pipes.","measured":{"value":604.8076923076923,"low":null,"high":null,"kind":"point","display":"604.8076923076923","units":"MG/L","statisticType":"avg","samplingContext":"source","censored":false,"detectionLimit":null,"rawVerbatim":"avg over 130 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":80.4,"low":null,"high":null,"kind":"point","display":"80.4","units":"MG/L","statisticType":"max_single","samplingContext":"other","rawVerbatim":"max detection 80.4 MG/L on 2026-02-03 (6/6 samples detected)"},{"value":83,"low":null,"high":null,"kind":"point","display":"83","units":"MG/L","statisticType":"avg","samplingContext":"entry_point","rawVerbatim":"avg over 32 samples (DL/2 substitution for 0 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(5/32 samples detected)"},{"value":null,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"MG/L","statisticType":"max_single","samplingContext":"other","rawVerbatim":"all 6 samples below DL (0.1 MG/L)"},{"value":0.060312500000000005,"low":null,"high":null,"kind":"point","display":"0.060312500000000005","units":"MG/L","statisticType":"avg","samplingContext":"entry_point","rawVerbatim":"avg over 32 samples (DL/2 substitution for 27 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 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16 samples below DL (0.2 MG/L)"},{"value":null,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"MG/L","statisticType":"max_single","samplingContext":"other","rawVerbatim":"all 6 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":31.4875,"low":null,"high":null,"kind":"point","display":"31.4875","units":"MG/L","statisticType":"avg","samplingContext":"entry_point","censored":false,"detectionLimit":null,"rawVerbatim":"avg over 32 samples (DL/2 substitution for 0 non-detects)"},"federalStandard":{"type":"mcl","value":500,"units":"MG/L","enforceable":true},"status":{"key":"under","label":"Within the 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