Downers Grove, IL Radon Levels
Check local Downers Grove radon levels and find certified testing and mitigation professionals to keep your home safe
Downers Grove, IL Radon Facts
Established in DuPage County within Chicago's western suburbs, Downers Grove sits on glacial till deposits from the Wisconsin glaciation that create ideal conditions for radon gas production and migration. Testing data reveals an average radon level of 14.0 pCi/L across zip codes 60515 and 60516, significantly exceeding the EPA action threshold. The community's predominantly single-family homes built between the 1950s and 1990s, most featuring full poured-concrete basements, require immediate radon testing and likely mitigation.
Based on 2 user-submitted radon tests for homes in Downers Grove, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Downers Grove, IL Radon Mitigation
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Downers Grove, IL Radon Levels
User-submitted radon test readings from homes in the Downers Grove area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 11 pCi/L | Downers Grove, IL | 51-99 Years | Full Basement |
| 17 pCi/L | Downers Grove, IL | 0-20 Years | Full Basement |
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Radon Readings Near Downers Grove, IL
Compare radon levels in Downers Grove with the closest nearby cities that have user-submitted test data.
Dupage County Radon Profile
EPA mapping assigns Dupage 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 25 cities in Dupage County average 6.98 pCi/L across 45 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 Dupage County home regardless of zone or a neighbor's results.