Chesterfield, MO Radon Levels
Check local Chesterfield radon levels and find certified testing and mitigation professionals to keep your home safe
Chesterfield, MO Radon Facts
Chesterfield in St. Louis County has recorded an average radon level of 5.0 pCi/L, which exceeds the EPA action level and warrants mitigation consideration. This affluent St. Louis suburb spans zip codes 63005 and 63017, featuring predominantly newer homes with full basements built over Missouri's limestone bedrock. The community's upscale residential character includes many custom homes where radon systems may need professional evaluation and potential activation.
Based on 1 user-submitted radon test for homes in Chesterfield, MO. The EPA recommends taking action at or above 4.0 pCi/L.
Chesterfield, MO Radon Mitigation
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Chesterfield, MO Radon Levels
User-submitted radon test readings from homes in the Chesterfield area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 5 pCi/L | Chesterfield, MO | 0-20 Years | Full Basement |
Have a radon test result for Chesterfield? Submit your reading to help other homeowners.
Radon Readings Near Chesterfield, MO
Compare radon levels in Chesterfield with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Ballwin | 3.7 mi | 4.00 pCi/L | 1 |
| Saint Charles | 8.8 mi | 5.00 pCi/L | 1 |
| Saint Peters | 10.0 mi | 7.00 pCi/L | 1 |
| Fenton | 11.2 mi | 16.00 pCi/L | 2 |
| O Fallon | 13.4 mi | 7.75 pCi/L | 4 |
| Hazelwood | 14.8 mi | 20.00 pCi/L | 1 |
| Lake Saint Louis | 15.5 mi | 5.00 pCi/L | 2 |
| House Springs | 15.7 mi | 7.00 pCi/L | 1 |
St Louis County Radon Profile
St Louis County has not been assigned a definitive EPA radon zone, so the agency recommends that every home be tested regardless of predicted risk. Homeowner-submitted tests from 4 cities in St Louis County average 12.20 pCi/L across 5 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in St Louis County.