{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/water-quality/99503/","name":"Water quality for ZIP 99503 — Anchorage (Spenard), AK","description":"Water quality data for ZIP 99503 (Anchorage (Spenard), 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 CWS serving the address, any health-based violations in the last 3 years, most recent lead and copper sampling result, and a link to the primary SDWIS record.","limitations":"Where a ZIP is served by multiple water systems, zipradar shows the dominant CWS by population served and lists alternates. Private well water is not covered."},"place":{"zip":"99503","city":"Anchorage (Spenard)","state":"AK","stateFull":"Alaska","county":"Anchorage Municipality","countySlug":"anchorage-municipality","geo":{"latitude":61.1901,"longitude":-149.8893}},"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,"datePublished":"2026-04-24","dateModified":"2026-09-07","canonicalUrl":"https://zipradar.org/topic/water-quality/99503/","zipDashboardUrl":"https://zipradar.org/zip/99503/","zipDashboardApiUrl":"https://zipradar.org/api/zip/99503/","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/99503/"}}