Louisiana Cities Ranked by Indoor Radon Levels
Measured averages from Airthings devices across Louisiana, USA. Action level: 4 pCi/L — the threshold at which remediation is recommended.
Baton Rouge has the highest measured indoor radon in Louisiana at 0.6 pCi/L, based on Airthings measurements across 7 cities.
Updated September 28, 2026
Highest city
0.6pCi/L
Baton Rouge
Louisiana city average
0.3pCi/L
across 7 cities
Above action level
0/ 7
cities
| # | Location | Avg level | vs action level |
|---|---|---|---|
| 1 | Baton Rouge | 0.6 pCi/L | 0.1× under |
| 2 | Covington | 0.4 pCi/L | 0.1× under |
| 3 | Marrero | 0.3 pCi/L | 0.1× under |
| 4 | Metairie Terrace | 0.2 pCi/L | 0.1× under |
| 5 | New Orleans | 0.2 pCi/L | 0.1× under |
| 6 | Kenner | 0.2 pCi/L | 0.0× under |
| 7 | Metairie | 0.1 pCi/L | 0.0× under |