{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/water-quality/25401/","name":"Water quality for ZIP 25401 — Martinsburg (WV), WV","description":"Water quality data for ZIP 25401 (Martinsburg (WV), West Virginia), 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":"25401","city":"Martinsburg (WV)","state":"WV","stateFull":"West Virginia","county":"Berkeley County (WV)","countySlug":"berkeley-county","geo":{"latitude":39.4562,"longitude":-77.9639}},"stateContext":{"topConcern":"Mining-affected water, flooding (Appalachian valleys)","narrative":"West Virginia's coal-mining counties face elevated EPA SDWIS compliance risk including the Elk River 2014 chemical spill legacy. Appalachian FEMA AE zones in narrow valleys are sensitive to FIRM revisions. Radon Zone 1-2."},"radonZone":null,"airQuality":null,"waterQuality":{"primary":{"pwsid":"WV3300218","name":"BERKELEY COUNTY PSWD-POTOMAC RIVER","populationServed":69372,"waterSource":"SW","violations":{"windowYears":3,"total":2,"healthBased":0,"latest":{"date":"2025-10-01","healthBased":false,"category":"Other","contaminant":"7000"}}},"systemCount":13,"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/25401/","zipDashboardUrl":"https://zipradar.org/zip/25401/","zipDashboardApiUrl":"https://zipradar.org/api/zip/25401","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/25401/"}}