Radon Levels in Tennessee
Tennessee is classified as an EPA Zone 2 state with a moderate risk for radon. Average indoor radon levels range from 1 to 4.5 pCi/L, and approximately 14% of Tennessee homes test above the EPA action level of 4.0 pCi/L.
Tennessee Radon Summary
Key Facts About Radon in Tennessee
- Eastern Tennessee (Appalachian region) has higher radon levels
- Middle Tennessee has moderate risk
- Western Tennessee (Memphis area) has lower risk
- TDEC provides radon resources
Tennessee Testing Requirements & Recommendations
Tennessee recommends testing, particularly in eastern counties.
East Tennessee's mountainous terrain requires experienced local radon contractors.
Major Cities in Tennessee
Radon levels can vary significantly within Tennessee depending on local geology. All residents — regardless of city — should test their specific home, as neighborhood-level radon varies independently of broader state and county averages.
What Should Tennessee Residents Do?
Test Your Home
Use a short-term charcoal test kit ($15–$25) for an initial reading, or a continuous radon detector for ongoing monitoring. Test in your basement or lowest livable area.
Understand Your Result
If your result is below 2.0 pCi/L: monitor periodically. Between 2.0–4.0 pCi/L: consider mitigation. Above 4.0 pCi/L: the EPA recommends mitigation. Above 8.0 pCi/L: take action promptly.
Hire a Certified Contractor if Needed
Look for NRPP or NRSB-certified radon mitigation contractors in Tennessee. Mitigation systems typically cost $800–$2,500 and can reduce radon levels by 50–99%.
Verify with a Follow-Up Test
After mitigation, test again to confirm the system is working. Retest every 2 years, or after significant home renovations.
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