{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/water-quality/46204/","name":"Water quality for ZIP 46204 — Indianapolis, IN","description":"Water quality data for ZIP 46204 (Indianapolis, Indiana), sourced from EPA SDWIS.","topic":{"slug":"water-quality","label":"Water quality","source":"EPA SDWIS","sourceUrl":"https://www.epa.gov/ground-water-and-drinking-water/safe-drinking-water-information-system-sdwis-federal-reporting","refreshCadence":"Quarterly (federal mandate)","summary":"Pages show the largest community water system on record for the ZIP's county, its PWSID and population served, and its health-based and total violations in the last 3 years. Lead and copper sampling results are not shown; your utility's annual water quality report (CCR) has them.","limitations":"Where a county has several water systems, zipradar shows the one serving the most people and says how many others are on record; yours may be a different one. Private well water is not covered."},"place":{"zip":"46204","city":"Indianapolis","state":"IN","stateFull":"Indiana","county":"Marion County","countySlug":"marion-county","geo":{"latitude":39.7717,"longitude":-86.158}},"stateContext":{"topConcern":"Radon, lead pipes (older Rust Belt cities)","narrative":"Indiana has Zone 1 radon coverage across most counties. Lead-service-line inventories under LCRR are heaviest in Gary, South Bend, Hammond, Indianapolis. Tornado exposure peaks April-June."},"radonZone":null,"airQuality":null,"waterQuality":{"primary":{"pwsid":"IN5249004","name":"CITIZENS WATER - INDIANAPOLIS","populationServed":880345,"waterSource":"SW","violations":{"windowYears":3,"total":0,"healthBased":0,"latest":null}},"systemCount":3,"caveat":"This is federal SDWIS reporting data for the community water system serving this county, not an address-level test result. Private well water is never covered by SDWIS. Where a county is served by multiple systems, this shows the one serving the most people."},"datePublished":"2026-04-24","dateModified":"2026-09-24","canonicalUrl":"https://zipradar.org/topic/water-quality/46204/","zipDashboardUrl":"https://zipradar.org/zip/46204/","zipDashboardApiUrl":"https://zipradar.org/api/zip/46204/","primarySourceUrl":"https://www.epa.gov/ground-water-and-drinking-water/safe-drinking-water-information-system-sdwis-federal-reporting","license":{"content":"CC-BY-4.0","attribution":"zipradar.org — https://zipradar.org/topic/water-quality/46204/"}}