Belleville, IL Radon Levels
Check local Belleville radon levels and find certified testing and mitigation professionals to keep your home safe
Belleville, IL Radon Facts
Located in St. Clair County on the Illinois side of the St. Louis Metro, Belleville records an average radon level of 7.33 pCi/L, exceeding the EPA action threshold. The city's position over Mississippi River floodplain deposits and underlying Mississippian limestone creates moderate radon potential, though individual homes near bluffs can see significantly elevated readings. Residents across zip codes 62220, 62221, 62223, and 62226 should test their homes, particularly those with basements or crawl spaces.
Based on 3 user-submitted radon tests for homes in Belleville, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Belleville, IL Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Belleville, IL Radon Levels
User-submitted radon test readings from homes in the Belleville area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 8 pCi/L | Belleville, IL | 51-99 Years | Full Basement |
| 6 pCi/L | Belleville, IL | 51-99 Years | Full Basement |
Have a radon test result for Belleville? Submit your reading to help other homeowners.
Radon Readings Near Belleville, IL
Compare radon levels in Belleville with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Fairview Heights | 4.4 mi | 9.00 pCi/L | 1 |
| O Fallon | 6.0 mi | 6.00 pCi/L | 1 |
| Caseyville | 7.1 mi | 7.50 pCi/L | 2 |
| Collinsville | 10.4 mi | 5.00 pCi/L | 1 |
| Lebanon | 11.7 mi | 10.50 pCi/L | 2 |
| Mascoutah | 11.9 mi | 6.50 pCi/L | 2 |
| Maryville | 12.6 mi | 11.00 pCi/L | 1 |
| Columbia | 13.2 mi | 8.00 pCi/L | 4 |
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.