How do I find a certified radon professional in Tennessee?
Search the two national certification directories, NRPP and NRSB, by ZIP code. Tennessee doesn't license radon testers or mitigators, so national certification is the best way to check that someone is qualified. The Tennessee Radon Program points residents to these same two directories (TDEC).
Key facts
- Tennessee has no state license for radon testers or mitigators (Indoor Environments Association, 2024).
- NRPP-certified professionals must follow ANSI/AARST standards and show continuing competence every two years (NRPP).
- Both NRPP and NRSB accept consumer complaints (NRPP, NRSB).
- We don't recommend or rank individual companies.
Do I need a professional to test my home?
Not usually. A do-it-yourself kit, including the free Tennessee kit, is accurate when used correctly. CDC notes that EPA recommends a qualified tester when you're buying or selling a home (CDC). Many home inspectors offer radon testing; ask whether they hold NRPP or NRSB measurement certification.
Do I need a professional to fix radon?
It's strongly recommended. The Tennessee Radon Program recommends hiring a certified mitigation professional (TDEC). Professionals follow the national standard for existing homes, ANSI/AARST SGM-SF-2023 (AARST standards).
What should I ask before hiring a radon mitigator?
- Are you certified for radon mitigation by NRPP or NRSB? What's your certification number?
- Will the system be installed to ANSI/AARST SGM-SF-2023?
- What type of system do you recommend for my foundation, and why?
- Where will the pipe and fan go, inside and outside the house?
- Is a follow-up radon test included after installation?
- How will I know the system is working, and what maintenance does it need?
- What does the warranty cover, and for how long?
What are the red flags?
- No certification number, or a claim of a "Tennessee radon license." Tennessee doesn't issue one.
- Pressure to fix based on one short-term test that hasn't been confirmed, unless you're on a home-sale deadline.
- No post-installation test included or recommended.
- The same company testing and fixing without disclosing it. That's common and legal, but you can get an independent follow-up test, including with the free state kit.
- A quote far outside the typical range without explanation. The American Lung Association cites roughly $1,000 to $2,500 or more as typical nationally (ALA).
How do I check a professional's certification?
Look the person or company up directly in the NRPP search or NRSB directory instead of relying on a logo on a website. Certification lapses if it isn't renewed, so check the current status before you hire.
What if I live in a rural county with no local professional?
Certified professionals often serve a wide area, so search a larger radius from your ZIP code. Many rural Tennessee counties are served by professionals based in nearby cities. Your county guide has local details.
Next step: Search the NRPP directory →
Sources: Tennessee Radon Program (TDEC) · NRPP · NRSB · ANSI/AARST Standards · Indoor Environments Association, 2024 · CDC – Testing for Radon · American Lung Association – Radon
Last reviewed October 17, 2026 by the Tennessee Radon Authority editorial team. How we research.