{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/water-quality/29401/","name":"Water quality for ZIP 29401 — Charleston, SC","description":"Water quality data for ZIP 29401 (Charleston, South Carolina), 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":"29401","city":"Charleston","state":"SC","stateFull":"South Carolina","county":"Charleston County","countySlug":"charleston-county","geo":{"latitude":32.7765,"longitude":-79.9311}},"stateContext":{"topConcern":"Hurricanes (coastal), inland flood","narrative":"South Carolina's coastline (Hilton Head, Charleston, Myrtle Beach) carries dense FEMA VE/AE zones. Inland AE zones along the Pee Dee, Santee, Saluda rivers. EPA SDWIS small-system compliance variability."},"radonZone":null,"airQuality":null,"waterQuality":{"primary":{"pwsid":"SC1010001","name":"CHARLESTON WATER SYSTEM (SC1010001)","populationServed":327422,"waterSource":"SW","violations":{"windowYears":3,"total":0,"healthBased":0,"latest":null}},"systemCount":14,"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/29401/","zipDashboardUrl":"https://zipradar.org/zip/29401/","zipDashboardApiUrl":"https://zipradar.org/api/zip/29401/","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/29401/"}}