{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/water-quality/78641/","name":"Water quality for ZIP 78641 — Leander (TX), TX","description":"Water quality data for ZIP 78641 (Leander (TX), Texas), 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":"78641","city":"Leander (TX)","state":"TX","stateFull":"Texas","county":"Williamson County (TX)","countySlug":"williamson-county","geo":{"latitude":30.5788,"longitude":-97.8531}},"stateContext":{"topConcern":"Hurricanes (Gulf coast), flooding, drought","narrative":"Texas Gulf coast has the largest FEMA VE/AE coverage of any state. Inland flooding (Hurricane Harvey 2017) triggered FIRM panel revisions for Houston metro. Drought + induced seismicity affect EPA SDWIS compliance in West Texas. Tornado risk in the Panhandle."},"radonZone":null,"airQuality":null,"waterQuality":{"primary":{"pwsid":"TX2460012","name":"CITY OF LEANDER","populationServed":98330,"waterSource":"SW","violations":{"windowYears":3,"total":7,"healthBased":0,"latest":{"date":"2026-01-01","healthBased":false,"category":"MR","contaminant":"5000"}}},"systemCount":1,"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/78641/","zipDashboardUrl":"https://zipradar.org/zip/78641/","zipDashboardApiUrl":"https://zipradar.org/api/zip/78641/","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/78641/"}}