Tennessee Cities Ranked by Indoor Radon Levels
Measured averages from Airthings devices across Tennessee, USA. Action level: 4 pCi/L — the threshold at which remediation is recommended.
Mosheim has the highest measured indoor radon in Tennessee at 12.6 pCi/L, based on Airthings measurements across 96 cities.
Updated August 16, 2026
Highest city
12.6pCi/L
Mosheim
Tennessee city average
3.5pCi/L
across 96 cities
Above action level
30/ 96
cities
| # | Location | Avg level | Monitors | vs action level |
|---|---|---|---|---|
| 1 | Mosheim | 12.6 pCi/L | 6 | 3.2× over |
| 2 | Spurgeon | 9.8 pCi/L | 10 | 2.4× over |
| 3 | Bluff City | 8.0 pCi/L | 10 | 2.0× over |
| 4 | Fairmount | 6.3 pCi/L | 21 | 1.6× over |
| 5 | Bean Station | 5.9 pCi/L | 10 | 1.5× over |
| 6 | Loudon | 5.8 pCi/L | 35 | 1.4× over |
| 7 | Colonial Heights | 5.7 pCi/L | 10 | 1.4× over |
| 8 | Unionville | 5.6 pCi/L | 6 | 1.4× over |
| 9 | Norris | 5.5 pCi/L | 6 | 1.4× over |
| 10 | East Ridge | 5.3 pCi/L | 10 | 1.3× over |
| 11 | Vonore | 5.2 pCi/L | 18 | 1.3× over |
| 12 | Bloomingdale | 5.2 pCi/L | 7 | 1.3× over |
| 13 | Kingsport | 5.0 pCi/L | 12 | 1.2× over |
| 14 | Maryville | 4.8 pCi/L | 38 | 1.2× over |
| 15 | Oak Hill | 4.7 pCi/L | 93 | 1.2× over |
| 16 | Sevierville | 4.7 pCi/L | 12 | 1.2× over |
| 17 | Seymour | 4.5 pCi/L | 9 | 1.1× over |
| 18 | Clarksville | 4.5 pCi/L | 37 | 1.1× over |
| 19 | Spencer | 4.4 pCi/L | 8 | 1.1× over |
| 20 | Nolensville | 4.3 pCi/L | 81 | 1.1× over |
| 21 | Pulaski | 4.3 pCi/L | 8 | 1.1× over |
| 22 | Columbia | 4.3 pCi/L | 29 | 1.1× over |
| 23 | Belle Meade | 4.2 pCi/L | 125 | 1.1× over |
| 24 | Gray | 4.2 pCi/L | 22 | 1.1× over |
| 25 | Hunter | 4.2 pCi/L | 6 | 1.0× over |
| 26 | Oliver Springs | 4.2 pCi/L | 7 | 1.0× over |
| 27 | Midway | 4.2 pCi/L | 12 | 1.0× over |
| 28 | Rural Hill | 4.1 pCi/L | 12 | 1.0× over |
| 29 | Jonesborough | 4.1 pCi/L | 22 | 1.0× over |
| 30 | Tusculum | 4.1 pCi/L | 13 | 1.0× over |
| ✓ Below EPA action level (4 pCi/L) | ||||
| 31 | Oak Grove | 4.0 pCi/L | 25 | 1.0× under |
| 32 | Greenback | 3.8 pCi/L | 11 | 1.0× under |
| 33 | Louisville | 3.8 pCi/L | 55 | 0.9× under |
| 34 | Nashville | 3.7 pCi/L | 269 | 0.9× under |
| 35 | Madisonville | 3.7 pCi/L | 6 | 0.9× under |
| 36 | Brentwood Estates | 3.6 pCi/L | 79 | 0.9× under |
| 37 | Morristown | 3.6 pCi/L | 9 | 0.9× under |
| 38 | Lakewood | 3.6 pCi/L | 56 | 0.9× under |
| 39 | Johnson City | 3.5 pCi/L | 38 | 0.9× under |
| 40 | Franklin | 3.5 pCi/L | 158 | 0.9× under |
| 41 | White House | 3.5 pCi/L | 13 | 0.9× under |
| 42 | Harrison | 3.5 pCi/L | 18 | 0.9× under |
| 43 | Brentwood | 3.5 pCi/L | 65 | 0.9× under |
| 44 | Cornersville | 3.5 pCi/L | 6 | 0.9× under |
| 45 | Cookeville | 3.5 pCi/L | 19 | 0.9× under |
| 46 | Forest Hills | 3.4 pCi/L | 52 | 0.9× under |
| 47 | Goodlettsville | 3.3 pCi/L | 15 | 0.8× under |
| 48 | McMinnville | 3.3 pCi/L | 9 | 0.8× under |
| 49 | Lenoir City | 3.3 pCi/L | 28 | 0.8× under |
| 50 | Gatlinburg | 3.2 pCi/L | 17 | 0.8× under |
| 51 | Greeneville | 3.2 pCi/L | 9 | 0.8× under |
| 52 | Elizabethton | 3.2 pCi/L | 9 | 0.8× under |
| 53 | Dayton | 3.1 pCi/L | 6 | 0.8× under |
| 54 | Jefferson City | 3.1 pCi/L | 6 | 0.8× under |
| 55 | Middle Valley | 3.1 pCi/L | 12 | 0.8× under |
| 56 | Oak Ridge | 3.0 pCi/L | 27 | 0.7× under |
| 57 | Spring Hill | 2.9 pCi/L | 37 | 0.7× under |
| 58 | Walden | 2.9 pCi/L | 19 | 0.7× under |
| 59 | Pegram | 2.9 pCi/L | 20 | 0.7× under |
| 60 | Knoxville | 2.8 pCi/L | 130 | 0.7× under |
| 61 | Wildwood | 2.8 pCi/L | 9 | 0.7× under |
| 62 | Shackle Island | 2.8 pCi/L | 19 | 0.7× under |
| 63 | Sale Creek | 2.7 pCi/L | 6 | 0.7× under |
| 64 | Pigeon Forge | 2.7 pCi/L | 8 | 0.7× under |
| 65 | East Brainerd | 2.6 pCi/L | 11 | 0.7× under |
| 66 | Hendersonville | 2.6 pCi/L | 31 | 0.7× under |
| 67 | Sweetwater | 2.5 pCi/L | 7 | 0.6× under |
| 68 | Farragut | 2.5 pCi/L | 129 | 0.6× under |
| 69 | Thompson's Station | 2.5 pCi/L | 46 | 0.6× under |
| 70 | Hopewell | 2.5 pCi/L | 14 | 0.6× under |
| 71 | Murfreesboro | 2.4 pCi/L | 54 | 0.6× under |
| 72 | Apison | 2.4 pCi/L | 8 | 0.6× under |
| 73 | Springfield | 2.2 pCi/L | 7 | 0.6× under |
| 74 | Clinton | 2.2 pCi/L | 25 | 0.6× under |
| 75 | Gallatin | 2.2 pCi/L | 25 | 0.5× under |
| 76 | Falling Water | 2.1 pCi/L | 11 | 0.5× under |
| 77 | Lookout Mountain | 2.1 pCi/L | 12 | 0.5× under |
| 78 | Smyrna | 2.1 pCi/L | 22 | 0.5× under |
| 79 | Collegedale | 2.1 pCi/L | 17 | 0.5× under |
| 80 | Chattanooga | 2.1 pCi/L | 19 | 0.5× under |
| 81 | Plainview | 2.0 pCi/L | 13 | 0.5× under |
| 82 | Germantown | 1.9 pCi/L | 18 | 0.5× under |
| 83 | Chapel Hill | 1.9 pCi/L | 16 | 0.5× under |
| 84 | Dickson | 1.9 pCi/L | 6 | 0.5× under |
| 85 | Bartlett | 1.9 pCi/L | 15 | 0.5× under |
| 86 | Green Hill | 1.9 pCi/L | 34 | 0.5× under |
| 87 | Maynardville | 1.8 pCi/L | 7 | 0.4× under |
| 88 | Woodbury | 1.8 pCi/L | 7 | 0.4× under |
| 89 | Mount Juliet | 1.6 pCi/L | 26 | 0.4× under |
| 90 | Lebanon | 1.5 pCi/L | 14 | 0.4× under |
| 91 | Fairview | 1.4 pCi/L | 13 | 0.4× under |
| 92 | Memphis | 1.4 pCi/L | 14 | 0.3× under |
| 93 | La Vergne | 1.3 pCi/L | 19 | 0.3× under |
| 94 | Signal Mountain | 1.3 pCi/L | 11 | 0.3× under |
| 95 | Collierville | 1.2 pCi/L | 8 | 0.3× under |
| 96 | Crossville | 1.0 pCi/L | 6 | 0.3× under |