{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/radon/40202/","name":"Radon for ZIP 40202 — Louisville, KY","description":"Radon data for ZIP 40202 (Louisville, Kentucky), 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":"40202","city":"Louisville","state":"KY","stateFull":"Kentucky","county":"Jefferson County","countySlug":"jefferson-county","geo":{"latitude":38.2541,"longitude":-85.7632}},"stateContext":{"topConcern":"Mining-affected water, flood (Ohio + tributaries)","narrative":"Kentucky's Appalachian eastern counties face mining-affected water systems with elevated EPA SDWIS compliance risk. Ohio River + tributary FEMA AE zones expose Louisville, Owensboro, and Newport. Radon risk varies by karst geology."},"radonZone":{"zone":1,"label":"Zone 1 — highest potential","potential":"predicted average indoor radon screening level greater than 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/40202/","zipDashboardUrl":"https://zipradar.org/zip/40202/","zipDashboardApiUrl":"https://zipradar.org/api/zip/40202/","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/40202/"}}