Downingtown, PA Radon Levels
Check local Downingtown radon levels and find certified testing and mitigation professionals to keep your home safe
Downingtown, PA Radon Facts
Nestled in Chester County within southeastern Pennsylvania's Piedmont region, Downingtown sits on metamorphic bedrock and residual soils that can produce elevated radon concentrations in residential properties. Recent testing shows an average radon level of 20.0 pCi/L in zip code 19335, significantly exceeding the EPA action threshold. Homeowners throughout this Philadelphia Metro community should prioritize immediate radon testing and mitigation, particularly in properties with traditional stone or block foundation basements.
Based on 1 user-submitted radon test for homes in Downingtown, PA. The EPA recommends taking action at or above 4.0 pCi/L.
Downingtown, PA Radon Mitigation
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Downingtown, PA Radon Levels
User-submitted radon test readings from homes in the Downingtown area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 20 pCi/L | Downingtown, PA | 0-20 Years | Full Basement |
Have a radon test result for Downingtown? Submit your reading to help other homeowners.
Radon Readings Near Downingtown, PA
Compare radon levels in Downingtown with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| West Chester | 7.6 mi | 6.67 pCi/L | 3 |
| Elverson | 10.4 mi | 16.00 pCi/L | 1 |
| Kennett Square | 11.2 mi | 9.00 pCi/L | 1 |
| Morgantown | 13.6 mi | 8.00 pCi/L | 1 |
| Glen Mills | 13.8 mi | 3.00 pCi/L | 1 |
| Pottstown | 15.2 mi | 7.00 pCi/L | 1 |
| Garnet Valley | 16.2 mi | 7.00 pCi/L | 1 |
| Wayne | 17.1 mi | 5.00 pCi/L | 1 |
Chester County Radon Profile
The bedrock and soils beneath Chester County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 8 cities in Chester County average 9.00 pCi/L across 10 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 Chester County.