Caseyville, IL Radon Levels
Check local Caseyville radon levels and find certified testing and mitigation professionals to keep your home safe
Caseyville, IL Radon Facts
Positioned on the Illinois side of the St. Louis metropolitan area, Caseyville sits within St. Clair County where Mississippi River floodplain deposits and underlying limestone create moderate-to-high radon potential. Based on 2 residential tests, this 62232 community reports an average radon level of 7.5 pCi/L, which exceeds the EPA action level of 4.0 pCi/L.
Based on 2 user-submitted radon tests for homes in Caseyville, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Caseyville, IL Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Caseyville, IL Radon Levels
User-submitted radon test readings from homes in the Caseyville area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 4 pCi/L | Caseyville, IL | 51-99 Years | Full Basement |
| 11 pCi/L | Caseyville, IL | 0-20 Years | Full Basement |
Have a radon test result for Caseyville? Submit your reading to help other homeowners.
Radon Readings Near Caseyville, IL
Compare radon levels in Caseyville with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Fairview Heights | 2.7 mi | 9.00 pCi/L | 1 |
| Collinsville | 3.7 mi | 5.00 pCi/L | 1 |
| Maryville | 6.1 mi | 11.00 pCi/L | 1 |
| Belleville | 7.1 mi | 7.33 pCi/L | 3 |
| O Fallon | 7.7 mi | 6.00 pCi/L | 1 |
| Granite City | 8.2 mi | 8.00 pCi/L | 1 |
| Glen Carbon | 9.0 mi | 2.50 pCi/L | 2 |
| Troy | 9.9 mi | 4.00 pCi/L | 1 |
St Clair County Radon Profile
EPA mapping assigns St Clair County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Homeowner-submitted tests from 7 cities in St Clair County average 7.50 pCi/L across 12 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every St Clair County home regardless of zone or a neighbor's results.