Saint Charles, MO Radon Levels
Check local Saint Charles radon levels and find certified testing and mitigation professionals to keep your home safe
Saint Charles, MO Radon Facts
Found in St Charles County as part of the greater St. Louis metropolitan area, Saint Charles encompasses multiple zip codes (63301, 63303, 63304) with varying housing characteristics and geological conditions. While comprehensive radon testing data is currently limited for these areas, Missouri's diverse geology can produce unexpected radon readings. Residents across all Saint Charles zip codes should consider radon testing, particularly in homes with basements or lower-level living spaces.
Based on 1 user-submitted radon test for homes in Saint Charles, MO. The EPA recommends taking action at or above 4.0 pCi/L.
Saint Charles, MO Radon Mitigation
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Saint Charles, MO Radon Levels
User-submitted radon test readings from homes in the Saint Charles area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 5 pCi/L | Saint Charles, MO | 51-99 Years | No Basement/All Slab |
Have a radon test result for Saint Charles? Submit your reading to help other homeowners.
Radon Readings Near Saint Charles, MO
Compare radon levels in Saint Charles with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Saint Peters | 3.6 mi | 7.00 pCi/L | 1 |
| Chesterfield | 8.8 mi | 5.00 pCi/L | 1 |
| O Fallon | 9.6 mi | 7.75 pCi/L | 4 |
| Hazelwood | 10.4 mi | 20.00 pCi/L | 1 |
| Ballwin | 12.1 mi | 4.00 pCi/L | 1 |
| Lake Saint Louis | 12.3 mi | 5.00 pCi/L | 2 |
| Fenton | 19.0 mi | 16.00 pCi/L | 2 |
| Labadie | 24.2 mi | 4.00 pCi/L | 1 |
St Charles County Radon Profile
A specific EPA radon zone has not been established for St Charles County, which is why testing is advised for all homes here irrespective of geology. Homeowner-submitted tests from 5 cities in St Charles County average 6.63 pCi/L across 8 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in St Charles County to test, as levels can differ between neighboring homes.