{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/water-quality/19958/","name":"Water quality for ZIP 19958 — Lewes (DE), DE","description":"Water quality data for ZIP 19958 (Lewes (DE), Delaware), 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":"19958","city":"Lewes (DE)","state":"DE","stateFull":"Delaware","county":"Sussex County (DE)","countySlug":"sussex-county","geo":{"latitude":38.774,"longitude":-75.1419}},"stateContext":{"topConcern":"Sea-level rise, agricultural runoff","narrative":"Delaware has the lowest mean elevation of any US state and FEMA NFHL coverage extends well inland in Sussex County. Agricultural runoff in poultry-heavy regions affects EPA SDWIS small-system nitrate readings. Lead-service-line inventories statewide are nearing 2024 LCRR baseline."},"radonZone":null,"airQuality":null,"waterQuality":{"primary":{"pwsid":"DE0000991","name":"REHOBOTH PUMP DISTRICT (TUI)","populationServed":81417,"waterSource":"GW","violations":{"windowYears":3,"total":0,"healthBased":0,"latest":null}},"systemCount":113,"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/19958/","zipDashboardUrl":"https://zipradar.org/zip/19958/","zipDashboardApiUrl":"https://zipradar.org/api/zip/19958","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/19958/"}}