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.
Priceville has the highest measured indoor radon in Alabama at 5.4 pCi/L, based on Airthings measurements across 25 cities.
Updated August 16, 2026
Highest city
5.4pCi/L
Priceville
Alabama city average
2.5pCi/L
across 25 cities
Above action level
5/ 25
cities
| # | Location | Avg level | Monitors | vs action level |
|---|---|---|---|---|
| 1 | Priceville | 5.4 pCi/L | 12 | 1.3× over |
| 2 | Harvest | 4.3 pCi/L | 46 | 1.1× over |
| 3 | Killen | 4.3 pCi/L | 7 | 1.1× over |
| 4 | Huntsville | 4.3 pCi/L | 184 | 1.1× over |
| 5 | Redstone Arsenal | 4.0 pCi/L | 14 | 1.0× over |
| ✓ Below EPA action level (4 pCi/L) | ||||
| 6 | Meridianville | 3.0 pCi/L | 9 | 0.8× under |
| 7 | Helena | 2.6 pCi/L | 10 | 0.7× under |
| 8 | Moores Mill | 2.5 pCi/L | 28 | 0.6× under |
| 9 | Owens Cross Roads | 2.5 pCi/L | 73 | 0.6× under |
| 10 | Hoover | 2.4 pCi/L | 11 | 0.6× under |
| 11 | Auburn | 2.4 pCi/L | 14 | 0.6× under |
| 12 | Madison | 2.4 pCi/L | 119 | 0.6× under |
| 13 | Decatur | 2.4 pCi/L | 6 | 0.6× under |
| 14 | Brook Highland | 2.2 pCi/L | 22 | 0.6× under |
| 15 | Muscle Shoals | 2.1 pCi/L | 8 | 0.5× under |
| 16 | Cahaba Heights | 2.0 pCi/L | 12 | 0.5× under |
| 17 | Mountain Brook | 2.0 pCi/L | 14 | 0.5× under |
| 18 | Athens | 1.8 pCi/L | 10 | 0.5× under |
| 19 | Lake Purdy | 1.8 pCi/L | 6 | 0.4× under |
| 20 | Falkville | 1.8 pCi/L | 6 | 0.4× under |
| 21 | Holt | 1.8 pCi/L | 8 | 0.4× under |
| 22 | Vestavia Hills | 1.4 pCi/L | 9 | 0.3× under |
| 23 | Homewood | 1.3 pCi/L | 11 | 0.3× under |
| 24 | New Market | 1.3 pCi/L | 8 | 0.3× under |
| 25 | Opelika | 0.8 pCi/L | 7 | 0.2× under |