{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/water-quality/96813/","name":"Water quality for ZIP 96813 — Honolulu, HI","description":"Water quality data for ZIP 96813 (Honolulu, Hawaii), 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":"96813","city":"Honolulu","state":"HI","stateFull":"Hawaii","county":"Honolulu County","countySlug":"honolulu-county","geo":{"latitude":21.3099,"longitude":-157.8581}},"stateContext":{"topConcern":"Tsunami, lava-zone, water-source isolation","narrative":"Hawaii's federated data is unusual: FEMA tsunami evacuation zones are state-managed alongside NFHL flood maps; Big Island lava-flow zones (USGS) overlay FEMA hazard layers. Each island operates independent water utilities, so EPA SDWIS PWSIDs do not aggregate across the state."},"radonZone":null,"airQuality":null,"waterQuality":{"primary":{"pwsid":"HI0000331","name":"HNL-WINDWARD-PEARL HARBOR","populationServed":631389,"waterSource":"GW","violations":{"windowYears":3,"total":0,"healthBased":0,"latest":null}},"systemCount":27,"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/96813/","zipDashboardUrl":"https://zipradar.org/zip/96813/","zipDashboardApiUrl":"https://zipradar.org/api/zip/96813/","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/96813/"}}