Idaho Department of Health and Welfare
Idaho radon (air)
No state license roster to republish. Updated / retrieved 2026-10-02 (US/Pacific).
If you are not sure you need a pro yet, see when a DIY radon test kit is enough or how to test a home for radon.
Idaho DHW does not publish a public statewide list of radon measurement or mitigation businesses and does not offer a state radon license roster on its site. This page does not invent company names, phones, licenses, or addresses to fill that gap.
DHW’s “Find a Certified Radon Professional” and mitigation sections point homeowners to nationally certified providers: NRPP or NRSB Find a Professional (the same links DHW publishes). Filter by measurement vs. mitigation, then re-check the credential before hiring.
What DHW says homeowners can do
- Radon is a gas you cannot see, smell, or taste. It comes from uranium breaking down in soil and rock and can enter a home through cracks in floors, walls, or around pipes.
- DHW states that 2 out of 5 Idaho homes have elevated radon levels. Levels vary by location — the only way to know is to test.
- EPA’s guideline remains 4.0 pCi/L. DHW advises mitigating when levels are higher than that guideline.
- Test the lowest level of the home where people spend time. Short-term tests (about 3–7 days; DHW notes winter is best) or long-term tests (up to a year) can measure radon.
- Kit options DHW lists: discounted kits via Air Chek, hardware/home-improvement stores, and a free test for Idaho residents (one every two years) when stock is available. DHW’s free-test offer was marked out of stock when this page was retrieved.
- Idaho’s Radon Library Lending Program (RLLP) lets residents check out a free radon test kit from participating public libraries statewide (DHW publishes the participating-library table on its radon hub).
- If a test is at or above 4.0 pCi/L, DHW says fix the home — DIY systems or a certified mitigation professional. Consider fixing between 2.0 and 3.9 pCi/L as well. Retest after changes.
- For new construction, DHW points to International Residential Code Appendix F guidance; those radon-control methods are not required statewide unless a city or county adopts them.
- Questions: Idaho DHW Environmental Health Program — radon@dhw.idaho.gov or 800-445-8647.
Official sources
- Idaho DHW — What is Radon? (retrieved 2026-10-02; primary hub)
- NRPP Find a Pro (linked from DHW for certified professionals)
- NRSB Find a Professional (linked from DHW for certified professionals)
- U.S. EPA Radon (linked from DHW guidance)
This index does not rank contractors or take referral fees. No Amazon kit links on this state page. This page covers indoor air only, not well water.