{
  "@context": "https://schema.org",
  "@type": "Dataset",
  "name": "zipradar — Radon by US ZIP",
  "description": "Radon per US ZIP code — sourced from EPA Radon Zones, refreshed static 1993 baseline plus state-level supplementary updates.",
  "url": "https://zipradar.org/topic/radon/",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "publisher": {
    "@type": "Organization",
    "name": "zipradar",
    "url": "https://zipradar.org"
  },
  "spatialCoverage": {
    "@type": "Country",
    "name": "United States"
  },
  "dateModified": "2026-04-26",
  "keywords": [
    "radon",
    "us zip code",
    "neighborhood data",
    "epa radon zones"
  ],
  "creator": {
    "@type": "Organization",
    "name": "EPA Radon Zones",
    "url": "https://www.epa.gov/radon/find-information-about-local-radon-zones-and-state-contact-information"
  },
  "isAccessibleForFree": true,
  "distribution": [
    {
      "@type": "DataDownload",
      "encodingFormat": "text/html",
      "contentUrl": "https://zipradar.org/topic/radon/",
      "description": "Topic landing page with full federation breakdown"
    },
    {
      "@type": "DataDownload",
      "encodingFormat": "application/json",
      "contentUrl": "https://zipradar.org/api/radon.json",
      "description": "Machine-readable topic metadata"
    }
  ],
  "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",
    "limitations": "Radon is a regional indicator. Address-level radon measurement requires an at-home test kit (often free from state health departments)."
  },
  "coverage": {
    "zip_count": 340,
    "state_count": 51,
    "url_template_per_zip": "https://zipradar.org/topic/radon/{zip}/",
    "url_template_per_state": "https://zipradar.org/topic/radon/state/{state-lowercase}/"
  },
  "sitemap": "https://zipradar.org/sitemap.xml",
  "sitemap_ai": "https://zipradar.org/sitemap-ai.xml",
  "contact": "contact@editnative.com"
}