Springfield, IL Radon Levels
Check local Springfield radon levels and find certified testing and mitigation professionals to keep your home safe
Springfield, IL Radon Facts
Illinois's capital city sits in Sangamon County within the central prairie region, where deep glacial deposits over limestone bedrock create significant radon potential. Springfield's average reading of 6.5 pCi/L substantially exceeds the EPA action level, with readings ranging from 3.0 to 10.0 pCi/L across zip codes 62701-62712. The city's mix of historic homes and postwar construction, predominantly featuring full basements, requires professional radon testing and potential mitigation.
Based on 2 user-submitted radon tests for homes in Springfield, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Springfield, IL Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Springfield, IL Radon Levels
User-submitted radon test readings from homes in the Springfield area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 10 pCi/L | Springfield, IL | 0-20 Years | — |
| 3 pCi/L | Springfield, IL | 51-99 Years | Full Basement |
Have a radon test result for Springfield? Submit your reading to help other homeowners.
Radon Readings Near Springfield, IL
Compare radon levels in Springfield with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Chatham | 8.7 mi | 3.00 pCi/L | 1 |
| Williamsville | 12.6 mi | 1.00 pCi/L | 1 |
| Auburn | 14.6 mi | 6.00 pCi/L | 1 |
| Divernon | 15.4 mi | 7.00 pCi/L | 1 |
| Lincolns New Salem | 18.0 mi | 8.00 pCi/L | 1 |
| Taylorville | 25.4 mi | 2.00 pCi/L | 1 |
| Jacksonville | 30.8 mi | 9.00 pCi/L | 2 |
| Moweaqua | 35.6 mi | 7.00 pCi/L | 1 |
Sangamon County Radon Profile
Sangamon County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Homeowner-submitted tests from 5 cities in Sangamon County average 5.00 pCi/L across 6 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 Sangamon County to test, as levels can differ between neighboring homes.