Naperville, IL Radon Levels
Check local Naperville radon levels and find certified testing and mitigation professionals to keep your home safe
Naperville, IL Radon Facts
Spanning DuPage County and Will County in the western suburbs of the Chicago Metro, Naperville demonstrates significant radon concerns with an average reading of 6.25 pCi/L that exceeds the EPA action level. The community's glacial till deposits over limestone bedrock, combined with predominantly basement-equipped homes built between the 1950s-1990s across zip codes 60540, 60563, 60564, and 60565, create conditions favorable for radon accumulation.
Based on 4 user-submitted radon tests for homes in Naperville, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Naperville, IL Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Naperville, IL Radon Levels
User-submitted radon test readings from homes in the Naperville area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 4 pCi/L | Naperville, IL | 21-50 Years | Partial Basement |
| 11 pCi/L | Naperville, IL | 21-50 Years | Partial Basement |
| 4 pCi/L | Naperville, IL | 21-50 Years | Full Basement |
| 6 pCi/L | Naperville, IL | 0-20 Years | Full Basement |
Have a radon test result for Naperville? Submit your reading to help other homeowners.
Radon Readings Near Naperville, IL
Compare radon levels in Naperville with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Lisle | 4.5 mi | 7.25 pCi/L | 4 |
| Bolingbrook | 4.7 mi | 9.00 pCi/L | 2 |
| Woodridge | 5.6 mi | 5.00 pCi/L | 1 |
| Warrenville | 5.8 mi | 10.50 pCi/L | 2 |
| Aurora | 6.3 mi | 6.75 pCi/L | 4 |
| Downers Grove | 7.8 mi | 14.00 pCi/L | 2 |
| Wheaton | 8.0 mi | 4.00 pCi/L | 1 |
| Winfield | 8.7 mi | 5.75 pCi/L | 4 |
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.