Greencastle, PA Radon Levels
Check local Greencastle radon levels and find certified testing and mitigation professionals to keep your home safe
Greencastle, PA Radon Facts
Located in south-central Pennsylvania's Franklin County, Greencastle has recorded notably high radon levels with one recent test showing 9.0 pCi/L. This reading substantially exceeds EPA action levels, reflecting the area's limestone bedrock and soil conditions that promote radon accumulation. Residents in zip code 17225 should prioritize professional radon testing and consider mitigation systems for their homes.
Based on 1 user-submitted radon test for homes in Greencastle, PA. The EPA recommends taking action at or above 4.0 pCi/L.
Greencastle, PA Radon Mitigation
Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.
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Greencastle, PA Radon Levels
User-submitted radon test readings from homes in the Greencastle area.
| Radon Level | City | Home Age | Foundation |
|---|---|---|---|
| 9 pCi/L | Greencastle, PA | 21-50 Years | Full Basement |
Have a radon test result for Greencastle? Submit your reading to help other homeowners.
Radon Readings Near Greencastle, PA
Compare radon levels in Greencastle with the closest nearby cities that have user-submitted test data.
| City | Distance | Avg User Level | Readings |
|---|---|---|---|
| Mercersburg | 8.9 mi | 6.50 pCi/L | 2 |
| Waynesboro | 9.6 mi | 5.00 pCi/L | 1 |
| Chambersburg | 10.9 mi | 10.14 pCi/L | 7 |
| Fayetteville | 14.3 mi | 7.00 pCi/L | 3 |
| Mc Connellsburg | 17.1 mi | 8.00 pCi/L | 1 |
| Fairfield | 20.4 mi | 7.50 pCi/L | 2 |
| Orrtanna | 20.6 mi | 20.00 pCi/L | 1 |
| Gettysburg | 28.1 mi | 6.50 pCi/L | 2 |
Franklin County Radon Profile
Because of its underlying geology, Franklin 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 5 cities in Franklin County average 8.50 pCi/L across 14 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 Franklin County home regardless of zone or a neighbor's results.