{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/water-quality/99501/","name":"Water quality for ZIP 99501 — Anchorage, AK","description":"Water quality data for ZIP 99501 (Anchorage, Alaska), 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":"99501","city":"Anchorage","state":"AK","stateFull":"Alaska","county":"Anchorage Municipality","countySlug":"anchorage-municipality","geo":{"latitude":61.2181,"longitude":-149.9003}},"stateContext":{"topConcern":"Permafrost, wildfire, and remote drinking-water systems","narrative":"Alaska's federated data carries unusual constraints: many parcels sit on permafrost where ground temperatures shape foundation risk; FEMA NFHL coverage is incomplete outside major boroughs; EPA SDWIS systems can be unincorporated or village-operated. Wildfire risk has accelerated 2020-2025 in the boreal interior."},"radonZone":null,"airQuality":null,"waterQuality":{"primary":{"pwsid":"AK2210906","name":"MOA MUNICIPALITY OF ANCHORAGE","populationServed":221351,"waterSource":"SW","violations":{"windowYears":3,"total":1,"healthBased":0,"latest":{"date":"2025-01-31","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/99501/","zipDashboardUrl":"https://zipradar.org/zip/99501/","zipDashboardApiUrl":"https://zipradar.org/api/zip/99501/","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/99501/"}}