Alabama Cities Ranked by Indoor Radon Levels
Measured averages from Airthings devices across Alabama, USA. Action level: 4 pCi/L — the threshold at which remediation is recommended.
Wedowee has the highest measured indoor radon in Alabama at 7.1 pCi/L, based on Airthings measurements across 34 cities.
Updated October 19, 2026
Highest city
7.1pCi/L
Wedowee
Alabama city average
2.6pCi/L
across 34 cities
Above action level
7/ 34
cities
| # | Location | Avg level | vs action level |
|---|---|---|---|
| 1 | Wedowee | 7.1 pCi/L | 1.8× over |
| 2 | Heflin | 6.0 pCi/L | 1.5× over |
| 3 | Priceville | 5.1 pCi/L | 1.3× over |
| 4 | Hazel Green | 4.7 pCi/L | 1.2× over |
| 5 | Killen | 4.3 pCi/L | 1.1× over |
| 6 | Harvest | 4.2 pCi/L | 1.1× over |
| 7 | Huntsville | 4.1 pCi/L | 1.0× over |
| ✓ Below EPA action level (4 pCi/L) | |||
| 8 | Redstone Arsenal | 3.8 pCi/L | 1.0× under |
| 9 | Guntersville | 3.4 pCi/L | 0.9× under |
| 10 | Meridianville | 3.0 pCi/L | 0.8× under |
| 11 | Birmingham | 2.8 pCi/L | 0.7× under |
| 12 | Helena | 2.6 pCi/L | 0.7× under |
| 13 | Moores Mill | 2.5 pCi/L | 0.6× under |
| 14 | Owens Cross Roads | 2.4 pCi/L | 0.6× under |
| 15 | Madison | 2.4 pCi/L | 0.6× under |
| 16 | Decatur | 2.4 pCi/L | 0.6× under |
| 17 | Hoover | 2.3 pCi/L | 0.6× under |
| 18 | Auburn | 2.3 pCi/L | 0.6× under |
| 19 | Brook Highland | 2.2 pCi/L | 0.6× under |
| 20 | Muscle Shoals | 2.0 pCi/L | 0.5× under |
| 21 | Cahaba Heights | 2.0 pCi/L | 0.5× under |
| 22 | Mountain Brook | 2.0 pCi/L | 0.5× under |
| 23 | Irondale | 1.8 pCi/L | 0.4× under |
| 24 | Lake Purdy | 1.8 pCi/L | 0.4× under |
| 25 | Falkville | 1.8 pCi/L | 0.4× under |
| 26 | Holt | 1.8 pCi/L | 0.4× under |
| 27 | Athens | 1.7 pCi/L | 0.4× under |
| 28 | Vestavia Hills | 1.4 pCi/L | 0.3× under |
| 29 | Homewood | 1.3 pCi/L | 0.3× under |
| 30 | New Market | 1.3 pCi/L | 0.3× under |
| 31 | Daphne | 1.2 pCi/L | 0.3× under |
| 32 | Bridgeport | 1.0 pCi/L | 0.2× under |
| 33 | Opelika | 0.8 pCi/L | 0.2× under |
| 34 | Elberta | 0.8 pCi/L | 0.2× under |