Tennessee Department of Environment and Conservation — Radon Program
Tennessee radon (air)
No state license roster to republish. Updated 2026-09-12 (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.
Tennessee does not license radon testers or mitigators and TDEC’s Radon Program does not publish a public statewide list of measurement or mitigation businesses for republication. This page does not invent company names, phones, licenses, or addresses to fill that gap.
TDEC steers homeowners to national directories instead: NRPP Professional Search or NRSB (the same organizations linked from the Tennessee Radon Program page). Filter by measurement vs. mitigation, then re-check the credential before hiring. The Radon Program hotline can also help locate certified help.
What TDEC says homeowners can do
- Radon is a radioactive gas from soil that can enter homes through cracks and gaps. You cannot see or smell it — testing indoor air is the only way to know a building’s level. This page covers indoor air, not well water.
- Due to Tennessee’s geology, elevated indoor radon is common. TDEC reports that about 1 in 4 homes that request a free program kit test above 4 pCi/L. Elevated results show up statewide, with higher prevalence in East Tennessee.
- EPA’s long-term action level remains 4 pCi/L. TDEC notes EPA also recommends considering action between 2 and 4 pCi/L, and immediate action above 4 pCi/L.
- Free short-term kits are offered to Tennessee residents through the program (about 6,000 kits per year while supplies last). Order via the official Air Chek form linked from TDEC: Order a free Tennessee radon test kit. Run the test 3 to 5 days only, record start and end times, and mail it back immediately (postage prepaid).
- County-level context (not a substitute for testing your own home): Tennessee radon levels by county.
- For mitigation, hire a certified professional found through NRPP or NRSB (linked from TDEC). Always re-check the credential before hiring.
- Questions: Tennessee Radon Program Hotline 1-800-232-1139; TDEC.Radon@tn.gov (program contacts also list office lines 615-532-0738 and 615-289-1531).
Official sources
- Tennessee Radon Program (TDEC) (retrieved 2026-09-12)
- TDEC-linked free radon test kit order form (Air Chek) (retrieved 2026-09-12)
- Tennessee radon levels by county (linked from TDEC; retrieved 2026-09-12)
- Tennessee Department of Health — Healthy Homes (linked from TDEC)
- NRPP Professional Search (linked from TDEC)
- NRSB (linked from TDEC as Professional Directory)
- U.S. EPA Radon (linked from TDEC)
This index does not rank contractors or take referral fees. No Amazon kit links on this state page.