{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/radon/19801/","name":"Radon for ZIP 19801 — Wilmington (DE), DE","description":"Radon data for ZIP 19801 (Wilmington (DE), Delaware), sourced from EPA Radon Zones.","topic":{"slug":"radon","label":"Radon","source":"EPA Radon Zones","sourceUrl":"https://www.epa.gov/radon/find-information-about-local-radon-zones-and-state-contact-information","refreshCadence":"Static 1993 baseline plus state-level supplementary updates","summary":"Pages show the county zone, what the classification means for home testing recommendations, and state-level supplementary data where available.","limitations":"Radon is a regional indicator. Address-level radon measurement requires an at-home test kit (often free from state health departments)."},"place":{"zip":"19801","city":"Wilmington (DE)","state":"DE","stateFull":"Delaware","county":"New Castle County","countySlug":"new-castle-county","geo":{"latitude":39.7459,"longitude":-75.5466}},"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":{"zone":2,"label":"Zone 2 — moderate potential","potential":"predicted average indoor radon screening level between 2 and 4 pCi/L","classification":"county-level, 1993 EPA baseline — not an address-level measurement","caveat":"The Map of Radon Zones should not be used to determine if individual homes need to be tested. No matter where you live, test your home for radon — it's easy and inexpensive."},"airQuality":null,"waterQuality":null,"datePublished":"2026-04-24","dateModified":"2026-09-24","canonicalUrl":"https://zipradar.org/topic/radon/19801/","zipDashboardUrl":"https://zipradar.org/zip/19801/","zipDashboardApiUrl":"https://zipradar.org/api/zip/19801/","primarySourceUrl":"https://www.epa.gov/radon/find-information-about-local-radon-zones-and-state-contact-information","license":{"content":"CC-BY-4.0","attribution":"zipradar.org — https://zipradar.org/topic/radon/19801/"}}