Williamsport, PA Radon Levels
Check local Williamsport radon levels and find certified testing and mitigation professionals to keep your home safe
Williamsport, PA Radon Facts
Williamsport in Lycoming County demonstrates significantly elevated radon levels, averaging 16.0 pCi/L - four times the EPA threshold. Pennsylvania's mountainous terrain and complex bedrock geology create prime conditions for radon accumulation in the 17701 area. Residents should prioritize immediate professional testing and mitigation, as readings have reached as high as 20.0 pCi/L in local homes.
Based on 4 user-submitted radon tests for homes in Williamsport, PA. The EPA recommends taking action at or above 4.0 pCi/L.
Williamsport, PA Radon Mitigation
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Williamsport, PA Radon Levels
User-submitted radon test readings from homes in the Williamsport area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 20 pCi/L | Williamsport, PA | — | Full Basement |
| 4 pCi/L | Williamsport, PA | 21-50 Years | Full Basement |
| 20 pCi/L | Williamsport, PA | 21-50 Years | Full Basement |
Have a radon test result for Williamsport? Submit your reading to help other homeowners.
Radon Readings Near Williamsport, PA
Compare radon levels in Williamsport with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Montoursville | 7.3 mi | 14.00 pCi/L | 1 |
| Jersey Shore | 12.8 mi | 15.00 pCi/L | 1 |
| New Columbia | 13.1 mi | 20.00 pCi/L | 1 |
| Lewisburg | 18.2 mi | 13.00 pCi/L | 1 |
| Mifflinburg | 20.5 mi | 4.00 pCi/L | 1 |
| Lock Haven | 22.2 mi | 6.00 pCi/L | 1 |
| Danville | 26.7 mi | 5.67 pCi/L | 3 |
| Shamokin Dam | 27.8 mi | 7.00 pCi/L | 2 |
Lycoming County Radon Profile
Because of its underlying geology, Lycoming County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 3 cities in Lycoming County average 15.50 pCi/L across 6 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 Lycoming County home regardless of zone or a neighbor's results.