Winfield, IL Radon Levels
Check local Winfield radon levels and find certified testing and mitigation professionals to keep your home safe
Winfield, IL Radon Facts
Winfield residents in DuPage County face elevated radon exposure, with local homes averaging 5.75 pCi/L — well above the EPA's 4.0 pCi/L action threshold. The western Chicago suburb's glacial till deposits over limestone bedrock create ideal conditions for radon accumulation in the area's predominantly full-basement homes built during the postwar suburban boom. Testing data from zip code 60190 shows readings ranging from 2.0 to 11.0 pCi/L, making mitigation systems a critical consideration for many properties.
Based on 4 user-submitted radon tests for homes in Winfield, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Winfield, IL Radon Mitigation
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Winfield, IL Radon Levels
User-submitted radon test readings from homes in the Winfield area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 5 pCi/L | Winfield, IL | 51-99 Years | Full Basement |
| 11 pCi/L | Winfield, IL | 21-50 Years | Full Basement |
| 2 pCi/L | Winfield, IL | 21-50 Years | Full Basement |
Have a radon test result for Winfield? Submit your reading to help other homeowners.
Radon Readings Near Winfield, IL
Compare radon levels in Winfield with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Carol Stream | 2.0 mi | 6.00 pCi/L | 1 |
| Wheaton | 2.9 mi | 4.00 pCi/L | 1 |
| Warrenville | 3.8 mi | 10.50 pCi/L | 2 |
| Glen Ellyn | 4.5 mi | 9.00 pCi/L | 3 |
| Glendale Heights | 4.9 mi | 11.00 pCi/L | 1 |
| Lisle | 6.9 mi | 7.25 pCi/L | 4 |
| Lombard | 7.0 mi | 6.25 pCi/L | 4 |
| Bartlett | 7.8 mi | 4.00 pCi/L | 3 |
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.