Maryland Heights, MO Radon Levels
Check local Maryland Heights radon levels and find certified testing and mitigation professionals to keep your home safe
Maryland Heights, MO Radon Facts
This St. Louis County suburb has recorded an average radon level of 9.0 pCi/L, significantly exceeding the EPA's 4.0 pCi/L action threshold and indicating immediate mitigation needs. Located within the broader St. Louis Metro area, Maryland Heights sits over limestone and dolomite bedrock that can facilitate substantial radon accumulation. The 63043 zip code area's predominantly suburban homes with basements create ideal conditions for radon concentration, making professional testing and mitigation essential.
St Louis County average: 12.20 pCi/L, based on 5 user-submitted tests across 4 cities in the county. No homeowner readings have been submitted for Maryland Heights itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.
Maryland Heights, MO Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Maryland Heights, MO Radon Levels
User-submitted radon test readings from homes in the Maryland Heights area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 9 pCi/L | MARYLAND HEIGHTS, MO | 21-50 Years | Full Basement |
Have a radon test result for Maryland Heights? Submit your reading to help other homeowners.
Radon Readings Near Maryland Heights, MO
Compare radon levels in Maryland Heights with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Hazelwood | 5.9 mi | 20.00 pCi/L | 1 |
| Saint Charles | 6.7 mi | 5.00 pCi/L | 1 |
| Chesterfield | 8.9 mi | 5.00 pCi/L | 1 |
| Saint Peters | 10.2 mi | 7.00 pCi/L | 1 |
| Ballwin | 10.3 mi | 4.00 pCi/L | 1 |
| Fenton | 15.3 mi | 16.00 pCi/L | 2 |
| O Fallon | 16.2 mi | 7.75 pCi/L | 4 |
| Lake Saint Louis | 18.9 mi | 5.00 pCi/L | 2 |
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.