Dataset · v1.0.0 · 10 rows
State radon regulatory index
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.
Pages published per state
Embed this chart: <iframe src="/datasets/state-regulatory-index/embed" width="100%" height="420" loading="lazy"></iframe>
The data
| State | Abbr | Credentialing regime | Primary agency | Disclosure mechanism | Testing required | Mitigation required | Markets covered (metro markets) | Cities covered (city pages) |
|---|---|---|---|---|---|---|---|---|
| Illinois | IL | state-license | Illinois Emergency Management Agency and Office of Homeland Security (IEMA-OHS), Radon Program | radon-specific-statute | false | false | 10 | 94 |
| Iowa | IA | state-license | Iowa state health department radon programme | general-disclosure-form | false | false | 11 | 73 |
| Nebraska | NE | state-certification | Nebraska Department of Health and Human Services radon programme | general-disclosure-form | false | false | 2 | 11 |
| Minnesota | MN | state-license | Minnesota Department of Health (MDH) Indoor Air Unit | radon-specific-statute | false | false | 1 | 6 |
| Wisconsin | WI | national-certification | Wisconsin Department of Health Services radon programme | radon-specific-statute | false | false | 1 | 7 |
| Michigan | MI | national-certification | Michigan state radon programme (Department of Environment, Great Lakes, and Energy) | general-disclosure-form | false | false | 1 | 7 |
| Ohio | OH | state-license | Ohio Department of Health (ODH) Radon Program | general-disclosure-form | false | false | 3 | 20 |
| Pennsylvania | PA | state-certification | Pennsylvania Department of Environmental Protection (DEP) Radon Division | general-disclosure-form | false | false | 2 | 13 |
| Colorado | CO | national-certification | Colorado Department of Public Health and Environment radon programme | warning-statement-required | false | false | 3 | 20 |
| Kentucky | KY | state-license | Kentucky Department for Public Health radon programme | general-disclosure-form | false | false | 1 | 7 |
Download and API
- state-regulatory-index.csv — 10 rows, comma separated.
- state-regulatory-index.json — rows plus the field schema, methodology, and version. Stable URL, same origin, no key required.
- index.json — the catalogue of every dataset, for programmatic discovery.
Licence. CC BY 4.0 — reuse with attribution to Radon Connect and a link to the dataset page.
Field schema
| Field | Type | Description |
|---|---|---|
state | string | State name. |
abbr | string | Two-letter postal abbreviation. |
regime | enum state-license · state-certification · national-certification | Whether radon professionals hold a state licence, a state certification, or a national credential because the state does not credential radon work. |
agency | string | The body that answers credentialing questions for this state. |
disclosure | enum radon-specific-statute · warning-statement-required · general-disclosure-form | How radon reaches a residential seller disclosure in this state. |
testingRequired | boolean | Whether state law requires a seller to test an existing home. False in every state indexed. |
mitigationRequired | boolean | Whether state law requires a seller to mitigate an elevated result. False in every state indexed. |
marketsCovered | number (metro markets) | Metro markets this platform publishes in that state. |
citiesCovered | number (city pages) | City pages this platform publishes in that state. |
Methodology
The question this answers
For each state this platform serves, who credentials radon work, how does radon reach a seller disclosure, and is anything actually required?
How a row comes to exist
- 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 and exclusion
- 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.
What this dataset cannot tell you
- 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.
Related
- Radon Connect Coverage Index — Every market, territory, and city page this platform publishes, as one table.
- Radon Testing Method Comparison Dataset — Which method answers which question — and which decisions each one cannot carry.
- State certification differences — Licensed states, certification states, and what to verify in each.
- NRPP certification — What the credential covers and how to verify it before hiring.
- NRSB certification — The second national credential — what it covers and how to check it.
- Research Center — every dataset, with its provenance and status.
- Research methodology — how this platform builds and checks content.
Sources
- U.S. EPA — Radon
- IEMA-OHS — Illinois Emergency Management Agency and Office of Homeland Security — Radon Program
- Illinois General Assembly — Illinois Radon Awareness Act (420 ILCS 46)
- Illinois General Assembly — Radon Industry Licensing Act (420 ILCS 44)
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