{
  "id": "state-regulatory-index",
  "title": "State Radon Regulatory Index",
  "description": "Every state we serve in one machine-readable table: credentialing regime, issuing agency, disclosure mechanism, and whether the state requires testing or mitigation. Generated from the platform registry, not transcribed.",
  "version": "1.0.0",
  "status": "published",
  "provenance": "derived-from-config",
  "license": "CC BY 4.0 — reuse with attribution to Radon Connect and a link to the dataset page.",
  "published": "2026-07-29",
  "canonical": "https://radonconnect.com/datasets/state-regulatory-index/",
  "schema": [
    {
      "key": "state",
      "label": "State",
      "type": "string",
      "description": "State name."
    },
    {
      "key": "abbr",
      "label": "Abbr",
      "type": "string",
      "description": "Two-letter postal abbreviation."
    },
    {
      "key": "regime",
      "label": "Credentialing regime",
      "type": "enum",
      "values": [
        "state-license",
        "state-certification",
        "national-certification"
      ],
      "description": "Whether radon professionals hold a state licence, a state certification, or a national credential because the state does not credential radon work."
    },
    {
      "key": "agency",
      "label": "Primary agency",
      "type": "string",
      "description": "The body that answers credentialing questions for this state."
    },
    {
      "key": "disclosure",
      "label": "Disclosure mechanism",
      "type": "enum",
      "values": [
        "radon-specific-statute",
        "warning-statement-required",
        "general-disclosure-form"
      ],
      "description": "How radon reaches a residential seller disclosure in this state."
    },
    {
      "key": "testingRequired",
      "label": "Testing required",
      "type": "boolean",
      "description": "Whether state law requires a seller to test an existing home. False in every state indexed."
    },
    {
      "key": "mitigationRequired",
      "label": "Mitigation required",
      "type": "boolean",
      "description": "Whether state law requires a seller to mitigate an elevated result. False in every state indexed."
    },
    {
      "key": "marketsCovered",
      "label": "Markets covered",
      "type": "number",
      "unit": "metro markets",
      "description": "Metro markets this platform publishes in that state."
    },
    {
      "key": "citiesCovered",
      "label": "Cities covered",
      "type": "number",
      "unit": "city pages",
      "description": "City pages this platform publishes in that state."
    }
  ],
  "methodology": {
    "question": "For each state this platform serves, who credentials radon work, how does radon reach a seller disclosure, and is anything actually required?",
    "construction": [
      "Rows are generated at build time from the state resource registry that also renders the /states/ pages, so the table and the prose cannot disagree.",
      "The regime and disclosure classifications are assigned by parsing the registry’s own licensing and disclosure descriptions against fixed patterns, rather than being typed a second time.",
      "Market and city counts are computed from the route registry, so they equal the number of pages actually published."
    ],
    "inclusion": [
      "A state appears when this platform publishes at least one market in it and maintains a resource centre for it.",
      "States we do not serve are excluded rather than estimated."
    ],
    "limitations": [
      "This is a structural index, not a compliance reference. Fee schedules, renewal cycles, form numbers, and application requirements change and are deliberately not included — the named agency is authoritative for those.",
      "The testing and mitigation columns record that no state indexed requires either of an existing home. They do not speak to new-construction requirements, which vary and have changed in several states.",
      "Classification into three regimes is a simplification of instruments that differ in detail. Read the state page before relying on the label."
    ]
  },
  "rowCount": 10,
  "rows": [
    {
      "state": "Illinois",
      "abbr": "IL",
      "regime": "state-license",
      "agency": "Illinois Emergency Management Agency and Office of Homeland Security (IEMA-OHS), Radon Program",
      "disclosure": "radon-specific-statute",
      "testingRequired": false,
      "mitigationRequired": false,
      "marketsCovered": 10,
      "citiesCovered": 94
    },
    {
      "state": "Iowa",
      "abbr": "IA",
      "regime": "state-license",
      "agency": "Iowa state health department radon programme",
      "disclosure": "general-disclosure-form",
      "testingRequired": false,
      "mitigationRequired": false,
      "marketsCovered": 11,
      "citiesCovered": 73
    },
    {
      "state": "Nebraska",
      "abbr": "NE",
      "regime": "state-certification",
      "agency": "Nebraska Department of Health and Human Services radon programme",
      "disclosure": "general-disclosure-form",
      "testingRequired": false,
      "mitigationRequired": false,
      "marketsCovered": 2,
      "citiesCovered": 11
    },
    {
      "state": "Minnesota",
      "abbr": "MN",
      "regime": "state-license",
      "agency": "Minnesota Department of Health (MDH) Indoor Air Unit",
      "disclosure": "radon-specific-statute",
      "testingRequired": false,
      "mitigationRequired": false,
      "marketsCovered": 1,
      "citiesCovered": 6
    },
    {
      "state": "Wisconsin",
      "abbr": "WI",
      "regime": "national-certification",
      "agency": "Wisconsin Department of Health Services radon programme",
      "disclosure": "radon-specific-statute",
      "testingRequired": false,
      "mitigationRequired": false,
      "marketsCovered": 1,
      "citiesCovered": 7
    },
    {
      "state": "Michigan",
      "abbr": "MI",
      "regime": "national-certification",
      "agency": "Michigan state radon programme (Department of Environment, Great Lakes, and Energy)",
      "disclosure": "general-disclosure-form",
      "testingRequired": false,
      "mitigationRequired": false,
      "marketsCovered": 1,
      "citiesCovered": 7
    },
    {
      "state": "Ohio",
      "abbr": "OH",
      "regime": "state-license",
      "agency": "Ohio Department of Health (ODH) Radon Program",
      "disclosure": "general-disclosure-form",
      "testingRequired": false,
      "mitigationRequired": false,
      "marketsCovered": 3,
      "citiesCovered": 20
    },
    {
      "state": "Pennsylvania",
      "abbr": "PA",
      "regime": "state-certification",
      "agency": "Pennsylvania Department of Environmental Protection (DEP) Radon Division",
      "disclosure": "general-disclosure-form",
      "testingRequired": false,
      "mitigationRequired": false,
      "marketsCovered": 2,
      "citiesCovered": 13
    },
    {
      "state": "Colorado",
      "abbr": "CO",
      "regime": "national-certification",
      "agency": "Colorado Department of Public Health and Environment radon programme",
      "disclosure": "warning-statement-required",
      "testingRequired": false,
      "mitigationRequired": false,
      "marketsCovered": 3,
      "citiesCovered": 20
    },
    {
      "state": "Kentucky",
      "abbr": "KY",
      "regime": "state-license",
      "agency": "Kentucky Department for Public Health radon programme",
      "disclosure": "general-disclosure-form",
      "testingRequired": false,
      "mitigationRequired": false,
      "marketsCovered": 1,
      "citiesCovered": 7
    }
  ]
}