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 117 cities.
Updated October 25, 2026
Highest city
12.6pCi/L
Mosheim
Tennessee city average
3.5pCi/L
across 117 cities
Above action level
36/ 117
cities
| # | Location | Avg level | vs action level |
|---|---|---|---|
| 1 | Mosheim | 12.6 pCi/L | 3.2× over |
| 2 | LaFollette | 12.2 pCi/L | 3.1× over |
| 3 | Spurgeon | 9.8 pCi/L | 2.4× over |
| 4 | Bluff City | 8.0 pCi/L | 2.0× over |
| 5 | Fall Branch | 7.9 pCi/L | 2.0× over |
| 6 | Athens | 7.1 pCi/L | 1.8× over |
| 7 | Lafayette | 6.8 pCi/L | 1.7× over |
| 8 | Fairmount | 6.2 pCi/L | 1.5× over |
| 9 | Loudon | 5.6 pCi/L | 1.4× over |
| 10 | Bloomingdale | 5.5 pCi/L | 1.4× over |
| 11 | Norris | 5.5 pCi/L | 1.4× over |
| 12 | Colonial Heights | 5.4 pCi/L | 1.3× over |
| 13 | Bean Station | 5.4 pCi/L | 1.3× over |
| 14 | Unionville | 5.3 pCi/L | 1.3× over |
| 15 | East Ridge | 5.3 pCi/L | 1.3× over |
| 16 | Kingsport | 5.1 pCi/L | 1.3× over |
| 17 | Sevierville | 4.8 pCi/L | 1.2× over |
| 18 | Maryville | 4.8 pCi/L | 1.2× over |
| 19 | Pine Crest | 4.6 pCi/L | 1.1× over |
| 20 | Seymour | 4.5 pCi/L | 1.1× over |
| 21 | Clarksville | 4.5 pCi/L | 1.1× over |
| 22 | Oak Hill | 4.5 pCi/L | 1.1× over |
| 23 | Spencer | 4.4 pCi/L | 1.1× over |
| 24 | Pulaski | 4.3 pCi/L | 1.1× over |
| 25 | East Chattanooga | 4.2 pCi/L | 1.1× over |
| 26 | Belle Meade | 4.2 pCi/L | 1.1× over |
| 27 | Nolensville | 4.2 pCi/L | 1.1× over |
| 28 | Hunter | 4.2 pCi/L | 1.0× over |
| 29 | Oliver Springs | 4.2 pCi/L | 1.0× over |
| 30 | Columbia | 4.2 pCi/L | 1.0× over |
| 31 | Midway | 4.2 pCi/L | 1.0× over |
| 32 | Rural Hill | 4.1 pCi/L | 1.0× over |
| 33 | Gray | 4.1 pCi/L | 1.0× over |
| 34 | Vonore | 4.1 pCi/L | 1.0× over |
| 35 | Tusculum | 4.1 pCi/L | 1.0× over |
| 36 | Oak Grove | 4.1 pCi/L | 1.0× over |
| ✓ Below EPA action level (4 pCi/L) | |||
| 37 | Tullahoma | 4.0 pCi/L | 1.0× under |
| 38 | Jonesborough | 3.9 pCi/L | 1.0× under |
| 39 | Dayton | 3.8 pCi/L | 1.0× under |
| 40 | Louisville | 3.8 pCi/L | 1.0× under |
| 41 | Nashville | 3.7 pCi/L | 0.9× under |
| 42 | Johnson City | 3.7 pCi/L | 0.9× under |
| 43 | Morristown | 3.6 pCi/L | 0.9× under |
| 44 | Brentwood Estates | 3.6 pCi/L | 0.9× under |
| 45 | Greenback | 3.6 pCi/L | 0.9× under |
| 46 | Lakewood | 3.5 pCi/L | 0.9× under |
| 47 | Harrison | 3.5 pCi/L | 0.9× under |
| 48 | White House | 3.5 pCi/L | 0.9× under |
| 49 | Brentwood | 3.5 pCi/L | 0.9× under |
| 50 | Cornersville | 3.5 pCi/L | 0.9× under |
| 51 | Franklin | 3.5 pCi/L | 0.9× under |
| 52 | Cookeville | 3.5 pCi/L | 0.9× under |
| 53 | Forest Hills | 3.4 pCi/L | 0.9× under |
| 54 | Madisonville | 3.4 pCi/L | 0.8× under |
| 55 | Goodlettsville | 3.4 pCi/L | 0.8× under |
| 56 | Condon | 3.3 pCi/L | 0.8× under |
| 57 | Lenoir City | 3.3 pCi/L | 0.8× under |
| 58 | McMinnville | 3.3 pCi/L | 0.8× under |
| 59 | Greeneville | 3.2 pCi/L | 0.8× under |
| 60 | Gatlinburg | 3.2 pCi/L | 0.8× under |
| 61 | Oak Ridge | 3.2 pCi/L | 0.8× under |
| 62 | Elizabethton | 3.2 pCi/L | 0.8× under |
| 63 | Jefferson City | 3.1 pCi/L | 0.8× under |
| 64 | Fincastle | 3.0 pCi/L | 0.8× under |
| 65 | Roan Mountain | 3.0 pCi/L | 0.7× under |
| 66 | Mount Pleasant | 3.0 pCi/L | 0.7× under |
| 67 | Pegram | 2.9 pCi/L | 0.7× under |
| 68 | Middle Valley | 2.9 pCi/L | 0.7× under |
| 69 | Walden | 2.9 pCi/L | 0.7× under |
| 70 | Knoxville | 2.9 pCi/L | 0.7× under |
| 71 | Spring Hill | 2.8 pCi/L | 0.7× under |
| 72 | Kingston | 2.8 pCi/L | 0.7× under |
| 73 | Shackle Island | 2.7 pCi/L | 0.7× under |
| 74 | Sale Creek | 2.7 pCi/L | 0.7× under |
| 75 | Wildwood | 2.7 pCi/L | 0.7× under |
| 76 | Soddy-Daisy | 2.7 pCi/L | 0.7× under |
| 77 | Pigeon Forge | 2.7 pCi/L | 0.7× under |
| 78 | East Brainerd | 2.6 pCi/L | 0.7× under |
| 79 | Hendersonville | 2.6 pCi/L | 0.7× under |
| 80 | Sweetwater | 2.5 pCi/L | 0.6× under |
| 81 | Farragut | 2.5 pCi/L | 0.6× under |
| 82 | Hopewell | 2.5 pCi/L | 0.6× under |
| 83 | Rockwood | 2.4 pCi/L | 0.6× under |
| 84 | Murfreesboro | 2.4 pCi/L | 0.6× under |
| 85 | Algood | 2.4 pCi/L | 0.6× under |
| 86 | Thompson's Station | 2.4 pCi/L | 0.6× under |
| 87 | Springfield | 2.2 pCi/L | 0.6× under |
| 88 | Apison | 2.2 pCi/L | 0.6× under |
| 89 | Clinton | 2.2 pCi/L | 0.6× under |
| 90 | Gallatin | 2.2 pCi/L | 0.5× under |
| 91 | Smyrna | 2.1 pCi/L | 0.5× under |
| 92 | Lookout Mountain | 2.1 pCi/L | 0.5× under |
| 93 | Newport | 2.1 pCi/L | 0.5× under |
| 94 | Chattanooga | 2.1 pCi/L | 0.5× under |
| 95 | Falling Water | 2.1 pCi/L | 0.5× under |
| 96 | Monteagle | 2.1 pCi/L | 0.5× under |
| 97 | Red Bank | 2.0 pCi/L | 0.5× under |
| 98 | Collegedale | 2.0 pCi/L | 0.5× under |
| 99 | Plainview | 2.0 pCi/L | 0.5× under |
| 100 | Maynardville | 2.0 pCi/L | 0.5× under |
| 101 | Germantown | 1.9 pCi/L | 0.5× under |
| 102 | Chapel Hill | 1.9 pCi/L | 0.5× under |
| 103 | Dickson | 1.9 pCi/L | 0.5× under |
| 104 | Green Hill | 1.9 pCi/L | 0.5× under |
| 105 | Bartlett | 1.9 pCi/L | 0.5× under |
| 106 | Woodbury | 1.8 pCi/L | 0.4× under |
| 107 | Signal Mountain | 1.7 pCi/L | 0.4× under |
| 108 | Mount Juliet | 1.7 pCi/L | 0.4× under |
| 109 | Bristol | 1.6 pCi/L | 0.4× under |
| 110 | Fairview | 1.5 pCi/L | 0.4× under |
| 111 | Shelbyville | 1.5 pCi/L | 0.4× under |
| 112 | Lebanon | 1.4 pCi/L | 0.4× under |
| 113 | La Vergne | 1.4 pCi/L | 0.4× under |
| 114 | Memphis | 1.4 pCi/L | 0.3× under |
| 115 | Collierville | 1.2 pCi/L | 0.3× under |
| 116 | Crossville | 1.1 pCi/L | 0.3× under |
| 117 | Fairfield Glade | 0.8 pCi/L | 0.2× under |