Clarendon Hills, IL Radon Levels
Check local Clarendon Hills radon levels and find certified testing and mitigation professionals to keep your home safe
Clarendon Hills, IL Radon Facts
Located in DuPage County within Chicago's western suburbs, Clarendon Hills sits on glacial till deposits that create favorable conditions for radon accumulation in basements. Testing data for zip code 60514 is currently limited, though the area's EPA Zone 2 status and predominant full-basement construction typical of 1950s-1990s suburban development warrant homeowner attention. The region's dense clay soils over limestone bedrock can trap radon gas, making testing particularly important for residents with finished lower levels.
Dupage County average: 6.98 pCi/L, based on 45 user-submitted tests across 25 cities in the county. No homeowner readings have been submitted for Clarendon Hills itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.
Clarendon Hills, IL Radon Mitigation
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Radon Readings Near Clarendon Hills, IL
No homeowner tests have been submitted for Clarendon Hills yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Westmont | 1.9 mi | 4.00 pCi/L | 1 |
| Oak Brook | 2.8 mi | 10.00 pCi/L | 1 |
| Western Springs | 3.0 mi | 7.00 pCi/L | 1 |
| Hinsdale | 3.1 mi | 5.00 pCi/L | 1 |
| Downers Grove | 3.2 mi | 14.00 pCi/L | 2 |
| Willowbrook | 3.8 mi | 6.00 pCi/L | 1 |
| Darien | 3.9 mi | 5.00 pCi/L | 1 |
| Westchester | 5.4 mi | 4.00 pCi/L | 1 |
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.