Lemont, IL Radon Levels
Check local Lemont radon levels and find certified testing and mitigation professionals to keep your home safe
Lemont, IL Radon Facts
Positioned in Cook County along the Chicago Metro's southwestern edge, Lemont sits on glacial till deposits over limestone bedrock where radon readings can vary dramatically between neighboring properties. Current testing shows an average level of 16.0 pCi/L, which significantly exceeds the EPA action threshold of 4.0 pCi/L and requires immediate mitigation attention. The community's historic limestone quarries and dense glacial soils create ideal conditions for elevated radon accumulation in homes with full basements typical of this area.
Based on 1 user-submitted radon test for homes in Lemont, IL. The EPA recommends taking action at or above 4.0 pCi/L.
Lemont, IL Radon Mitigation
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Lemont, IL Radon Levels
User-submitted radon test readings from homes in the Lemont area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 16 pCi/L | Lemont, IL | 21-50 Years | — |
Have a radon test result for Lemont? Submit your reading to help other homeowners.
Radon Readings Near Lemont, IL
Compare radon levels in Lemont with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Darien | 2.5 mi | 5.00 pCi/L | 1 |
| Willowbrook | 3.4 mi | 6.00 pCi/L | 1 |
| Westmont | 4.5 mi | 4.00 pCi/L | 1 |
| Woodridge | 4.9 mi | 5.00 pCi/L | 1 |
| Willow Springs | 5.4 mi | 5.50 pCi/L | 2 |
| Downers Grove | 5.5 mi | 14.00 pCi/L | 2 |
| Romeoville | 6.7 mi | 15.00 pCi/L | 1 |
| Bolingbrook | 7.3 mi | 9.00 pCi/L | 2 |
Cook County Radon Profile
Cook County is mapped as EPA Radon Zone 2, where the local geology is predicted to produce moderate indoor screening levels between 2 and 4 pCi/L. Homeowner-submitted tests from 40 cities in Cook County average 6.44 pCi/L across 82 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Cook County.