{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-05-26T09:07:22.965Z"},"system":{"slug":"ca_sdwis_edt__CA3310009__2025","name":"Eastern Municipal Wd","state":"CA","year":2025,"url":"https://www.thewatermap.com/water/ca/eastern-municipal-wd/2025","apiUrl":"https://www.thewatermap.com/api/water/ca/eastern-municipal-wd/2025","markdownUrl":"https://www.thewatermap.com/water/ca/eastern-municipal-wd/2025/llms.txt","coordinates":{"latitude":33.6863987,"longitude":-117.1778599},"contaminantsMeasured":123,"contaminantsWithFederalLimit":81,"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":1.5861111111111112,"low":null,"high":null,"kind":"point","display":"1.5861111111111112","units":"UG/L","statisticType":"avg","samplingContext":"source","censored":false,"detectionLimit":null,"rawVerbatim":"avg over 72 samples (DL/2 substitution for 18 non-detects)"},"federalStandard":{"type":"mcl","value":6,"units":"UG/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":4.9,"low":null,"high":null,"kind":"point","display":"4.9","units":"UG/L","statisticType":"max_single","samplingContext":"source","rawVerbatim":"max detection 4.9 UG/L on 2025-01-02 (54/72 samples detected)"},{"value":0.6,"low":null,"high":null,"kind":"point","display":"0.6","units":"UG/L","statisticType":"max_single","samplingContext":"entry_point","rawVerbatim":"max detection 0.6 UG/L on 2025-10-06 (15/27 samples 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risk.","measured":{"value":33.98954545454546,"low":null,"high":null,"kind":"point","display":"33.98954545454546","units":"UG/L","statisticType":"avg","samplingContext":"entry_point","censored":false,"detectionLimit":null,"rawVerbatim":"avg over 22 samples (DL/2 substitution for 1 non-detects)"},"federalStandard":{"type":"mcl","value":80,"units":"UG/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":33.56428571428571,"low":null,"high":null,"kind":"point","display":"33.56428571428571","units":"UG/L","statisticType":"avg","samplingContext":"distribution","rawVerbatim":"avg over 56 samples (DL/2 substitution for 0 non-detects)"},{"value":33.98954545454546,"low":null,"high":null,"kind":"point","display":"33.98954545454546","units":"UG/L","statisticType":"avg","samplingContext":"entry_point","rawVerbatim":"avg over 22 samples (DL/2 substitution for 1 non-detects)"},{"value":61,"low":null,"high":null,"kind":"point","display":"61","units":"UG/L","statisticType":"max_single","samplingContext":"entry_point","rawVerbatim":"max detection 61.0 UG/L on 2025-06-02 (21/22 samples detected)"},{"value":67,"low":null,"high":null,"kind":"point","display":"67","units":"UG/L","statisticType":"max_single","samplingContext":"distribution","rawVerbatim":"max detection 67.0 UG/L on 2025-03-20 (56/56 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":607.7132165605096,"low":null,"high":null,"kind":"point","display":"607.7132165605096","units":"MG/L","statisticType":"avg","samplingContext":"source","censored":false,"detectionLimit":null,"rawVerbatim":"avg over 628 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":154,"low":null,"high":null,"kind":"point","display":"154","units":"MG/L","statisticType":"max_single","samplingContext":"entry_point","rawVerbatim":"max detection 154.0 MG/L on 2025-04-07 (119/119 samples detected)"},{"value":62.809090909090905,"low":null,"high":null,"kind":"point","display":"62.809090909090905","units":"MG/L","statisticType":"avg","samplingContext":"other","rawVerbatim":"avg over 22 samples (DL/2 substitution for 0 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non-detects)"}]},{"analyteId":"cyanide","name":"Cyanide","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":null,"whatItIs":null,"whyItMatters":null,"measured":{"value":null,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"UG/L","statisticType":"max_single","samplingContext":"entry_point","censored":true,"detectionLimit":20,"rawVerbatim":"all 5 samples below DL (20.0 UG/L)"},"federalStandard":{"type":"mcl","value":150,"units":"UG/L","enforceable":true},"status":{"key":"none","label":"None detected"},"breakdowns":[],"measurements":[{"value":null,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"UG/L","statisticType":"max_single","samplingContext":"entry_point","rawVerbatim":"all 5 samples below DL (20.0 UG/L)"},{"value":null,"low":null,"high":null,"kind":"non_detect","display":"Not detected","units":"UG/L","statisticType":"max_single","samplingContext":"source","rawVerbatim":"all 17 samples below DL (20.0 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substitution for 12 non-detects)"},{"value":0.32,"low":null,"high":null,"kind":"point","display":"0.32","units":"MG/L","statisticType":"max_single","samplingContext":"entry_point","rawVerbatim":"max detection 0.32 MG/L on 2025-10-13 (16/119 samples detected)"},{"value":0.21,"low":null,"high":null,"kind":"point","display":"0.21","units":"MG/L","statisticType":"max_single","samplingContext":"other","rawVerbatim":"max detection 0.21 MG/L on 2025-04-10 (2/22 samples detected)"},{"value":0.06495798319327731,"low":null,"high":null,"kind":"point","display":"0.06495798319327731","units":"MG/L","statisticType":"avg","samplingContext":"entry_point","rawVerbatim":"avg over 119 samples (DL/2 substitution for 103 non-detects)"},{"value":0.62,"low":null,"high":null,"kind":"point","display":"0.62","units":"MG/L","statisticType":"max_single","samplingContext":"source","rawVerbatim":"max detection 0.62 MG/L on 2025-08-05 (65/77 samples 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limit"},"breakdowns":[],"measurements":[{"value":11.4,"low":null,"high":null,"kind":"point","display":"11.4","units":"MG/L","statisticType":"max_single","samplingContext":"source","rawVerbatim":"max detection 11.4 MG/L on 2025-04-02 (76/84 samples detected)"},{"value":0.62,"low":null,"high":null,"kind":"point","display":"0.62","units":"MG/L","statisticType":"max_single","samplingContext":"other","rawVerbatim":"max detection 0.62 MG/L on 2025-04-10 (1/22 samples detected)"},{"value":6.01,"low":null,"high":null,"kind":"point","display":"6.01","units":"MG/L","statisticType":"max_single","samplingContext":"entry_point","rawVerbatim":"max detection 6.01 MG/L on 2025-10-01 (119/202 samples detected)"},{"value":1.1737623762376237,"low":null,"high":null,"kind":"point","display":"1.1737623762376237","units":"MG/L","statisticType":"avg","samplingContext":"entry_point","rawVerbatim":"avg over 202 samples (DL/2 substitution for 83 non-detects)"},{"value":0.21909090909090911,"low":null,"high":null,"kind":"point","display":"0.21909090909090911","units":"MG/L","statisticType":"avg","samplingContext":"other","rawVerbatim":"avg over 22 samples (DL/2 substitution for 21 non-detects)"},{"value":5.772619047619047,"low":null,"high":null,"kind":"point","display":"5.772619047619047","units":"MG/L","statisticType":"avg","samplingContext":"source","rawVerbatim":"avg over 84 samples (DL/2 substitution for 8 non-detects)"}]},{"analyteId":"nitrite","name":"Nitrite","family":"inorganic","familyLabel":"Inorganic chemicals","casrn":null,"whatItIs":"A compound from fertilizer runoff, sewage, and erosion of natural deposits.","whyItMatters":"Like nitrate, elevated levels can cause 'blue baby syndrome' 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":0.1,"rawVerbatim":"all 84 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health-based federal limit; high levels can have a laxative effect and a bitter taste.","measured":{"value":112.33896103896105,"low":null,"high":null,"kind":"point","display":"112.33896103896105","units":"MG/L","statisticType":"avg","samplingContext":"source","censored":false,"detectionLimit":null,"rawVerbatim":"avg over 77 samples (DL/2 substitution for 1 non-detects)"},"federalStandard":{"type":"mcl","value":500,"units":"MG/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":476,"low":null,"high":null,"kind":"point","display":"476","units":"MG/L","statisticType":"max_single","samplingContext":"source","rawVerbatim":"max detection 476.0 MG/L on 2025-07-02 (76/77 samples detected)"},{"value":37.93636363636364,"low":null,"high":null,"kind":"point","display":"37.93636363636364","units":"MG/L","statisticType":"avg","samplingContext":"other","rawVerbatim":"avg over 22 samples (DL/2 substitution for 0 non-detects)"},{"value":112.33896103896105,"low":null,"high":null,"kind":"point","display":"112.33896103896105","units":"MG/L","statisticType":"avg","samplingContext":"source","rawVerbatim":"avg over 77 samples (DL/2 substitution for 1 non-detects)"},{"value":193,"low":null,"high":null,"kind":"point","display":"193","units":"MG/L","statisticType":"max_single","samplingContext":"entry_point","rawVerbatim":"max detection 193.0 MG/L on 2025-10-13 (119/119 samples detected)"},{"value":160,"low":null,"high":null,"kind":"point","display":"160","units":"MG/L","statisticType":"max_single","samplingContext":"other","rawVerbatim":"max detection 160.0 MG/L on 2025-04-10 (22/22 samples detected)"},{"value":37.67563025210084,"low":null,"high":null,"kind":"point","display":"37.67563025210084","units":"MG/L","statisticType":"avg","samplingContext":"entry_point","rawVerbatim":"avg over 119 samples (DL/2 substitution for 0 non-detects)"}]}]},{"family":"metal","familyLabel":"Metals","contaminants":[{"analyteId":"aluminum","name":"Aluminum","family":"metal","familyLabel":"Metals","casrn":null,"whatItIs":"A common element sometimes used as a treatment coagulant.","whyItMatters":"Regulated only as a secondary (cosmetic) standard; high levels can discolor water.","measured":{"value":7,"low":null,"high":null,"kind":"point","display":"7","units":"UG/L","statisticType":"avg","samplingContext":"entry_point","censored":false,"detectionLimit":null,"rawVerbatim":"avg over 25 samples (DL/2 substitution for 4 non-detects)"},"federalStandard":{"type":"mcl","value":1000,"units":"UG/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":12,"low":null,"high":null,"kind":"point","display":"12","units":"UG/L","statisticType":"max_single","samplingContext":"source","rawVerbatim":"max detection 12.0 UG/L on 2025-10-15 (9/110 samples 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