Maryville, IL Radon Levels
Check local Maryville radon levels and find certified testing and mitigation professionals to keep your home safe
Maryville, IL Radon Facts
Situated on the Illinois side of the St. Louis metropolitan area, Madison County communities like Maryville face significant radon exposure due to Mississippi River floodplain deposits over underlying limestone bedrock. Local testing data shows an average indoor radon level of 11.0 pCi/L, which substantially exceeds the EPA's 4.0 pCi/L action threshold. Given this elevated risk and the prevalence of homes with basements in zip code 62062, professional radon testing and mitigation should be considered essential for all residents.
Based on 1 user-submitted radon test for homes in Maryville, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Maryville, IL Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Maryville, IL Radon Levels
User-submitted radon test readings from homes in the Maryville area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 11 pCi/L | Maryville, IL | 21-50 Years | Full Basement |
Have a radon test result for Maryville? Submit your reading to help other homeowners.
Radon Readings Near Maryville, IL
Compare radon levels in Maryville with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Collinsville | 2.3 mi | 5.00 pCi/L | 1 |
| Glen Carbon | 3.3 mi | 2.50 pCi/L | 2 |
| Troy | 5.2 mi | 4.00 pCi/L | 1 |
| Caseyville | 6.1 mi | 7.50 pCi/L | 2 |
| Granite City | 7.9 mi | 8.00 pCi/L | 1 |
| Fairview Heights | 8.4 mi | 9.00 pCi/L | 1 |
| O Fallon | 10.5 mi | 6.00 pCi/L | 1 |
| Lebanon | 11.7 mi | 10.50 pCi/L | 2 |
Madison County Radon Profile
The soils and bedrock of Madison County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Homeowner-submitted tests from 8 cities in Madison County average 5.44 pCi/L across 9 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 Madison County to test, as levels can differ between neighboring homes.