{"dataset":{"name":"U.S. Drinking Water Quality — Contaminant Measurements","license":"https://creativecommons.org/licenses/by/4.0/","homepage":"https://www.thewatermap.com"},"meta":{"generatedAt":"2026-06-09T22:38:27.398Z"},"system":{"slug":"epa_sdwis_lcr__IL0312280__2022","name":"Olympia Fields","state":"IL","year":2022,"url":"https://www.thewatermap.com/water/il/olympia-fields/2022","apiUrl":"https://www.thewatermap.com/api/water/il/olympia-fields/2022","markdownUrl":"https://www.thewatermap.com/water/il/olympia-fields/2022/llms.txt","coordinates":{"latitude":41.5134,"longitude":-87.6742},"contaminantsMeasured":1,"contaminantsWithFederalLimit":1,"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":"metal","familyLabel":"Metals","contaminants":[{"analyteId":"lead","name":"Lead","family":"metal","familyLabel":"Metals","casrn":null,"whatItIs":"A toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.","whyItMatters":"There is no safe level of lead; it harms brain development in children and raises blood pressure in adults. The EPA sets an action level, not a health goal above zero.","measured":{"value":0.00336,"low":null,"high":null,"kind":"point","display":"0.00336","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"lead 90th-percentile 0.00336 mg/L (EPA SDWIS LCR, 2 round(s), 2022)"},"federalStandard":{"type":"AL","value":0.015,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.00336,"low":null,"high":null,"kind":"point","display":"0.00336","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"lead 90th-percentile 0.00336 mg/L (EPA SDWIS LCR, 2 round(s), 2022)"}]}]}],"contaminants":[{"analyteId":"lead","name":"Lead","family":"metal","familyLabel":"Metals","casrn":null,"whatItIs":"A toxic metal that leaches into water from old service lines, solder, and plumbing fixtures.","whyItMatters":"There is no safe level of lead; it harms brain development in children and raises blood pressure in adults. The EPA sets an action level, not a health goal above zero.","measured":{"value":0.00336,"low":null,"high":null,"kind":"point","display":"0.00336","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","censored":false,"detectionLimit":null,"rawVerbatim":"lead 90th-percentile 0.00336 mg/L (EPA SDWIS LCR, 2 round(s), 2022)"},"federalStandard":{"type":"AL","value":0.015,"units":"mg/L","enforceable":true},"status":{"key":"under","label":"Within the limit"},"breakdowns":[],"measurements":[{"value":0.00336,"low":null,"high":null,"kind":"point","display":"0.00336","units":"mg/L","statisticType":"p90","samplingContext":"at_the_tap","rawVerbatim":"lead 90th-percentile 0.00336 mg/L (EPA SDWIS LCR, 2 round(s), 2022)"}]}]}}