Wyoming Department of Health (WDH) · Wyoming Cancer Program · Radon
Wyoming radon (air)
No state company roster to republish. Updated / retrieved 2026-10-12 (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.
WDH does not publish a public statewide list of radon testing or mitigation companies to republish, and we found no public Wyoming state radon license roster. This page does not invent company names, phones, licenses, or addresses to fill that gap.
Who to hire: WDH’s Find a Professional page says that if your home tests at or above 4.0 pCi/L you should contact a certified radon professional, and points to the two national programs: NRPP Find a Pro or NRSB Find a Professional.
Licensing: Wyoming’s state radon fact sheet (2022) says Wyoming has no statewide enacted radon legislation. Some NRPP listings carry a note about Wyoming state licensing, so if a contractor or listing mentions a state license, confirm it with the WDH radon program before you hire. Compare proposals against the ANSI/AARST radon standards and get more than one estimate.
What WDH says Wyoming homeowners can do
- Wyoming’s radon fact sheet says a majority of Wyoming is EPA Zone 1, predicted to average at or above 4.0 pCi/L indoors, and only two counties fall in Zone 2 (predicted above 2.0 pCi/L). Your county’s average is not a substitute for testing your own home.
- Free test kits: the Wyoming Cancer Program offers radon test kits at no cost to Wyoming residents while supplies last (WDH news release, January 13, 2026). Order through health.wyo.gov/radon.
- Library monitors: WDH says the program works with local libraries so residents can borrow continuous radon monitors; the radon page lists participating libraries.
- WDH treats anything over 4 pCi/L as elevated and the point where fixing is needed. EPA recommends a mitigation system when levels are confirmed at or above that level, and WDH cites EPA advice to retest about every two years.
- New homes: the fact sheet says Teton County adopted IRC Appendix F (radon control methods) in 2004, and 18 towns have adopted Appendix F too. Ask your local building department whether it applies where you live.
- Questions: Wyoming Cancer Program 800-264-1296 or wdh.cancerservices@wyo.gov (as printed on the WDH radon pages).
- Radon can also be in well water; this index page covers indoor air only.
Official sources
- WDH — Radon (Wyoming Cancer Program) (retrieved 2026-10-12; primary hub, test kits and county averages)
- WDH — Find a Professional (retrieved 2026-10-12; points to NRPP/NRSB, no company list)
- WDH — Consider Radon Testing for Your Wyoming Home (news release, January 13, 2026; free kits while supplies last)
- WDH — Radon Awareness Heightened By Winning Student Posters (library continuous monitors)
- Wyoming Radon Program fact sheet (2022, PDF) (Zone 1 coverage, legislation, Appendix F)
- NRPP Find a Pro (recommended by WDH)
- NRSB Find a Professional (recommended by WDH)
- U.S. EPA Radon
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.