Short answer: the median radon test in Cumberland County was 5.8 pCi/L (CDC, lab tests 2008 to 2017). That means at least half of the tested buildings were at or above EPA’s action level of 4 pCi/L.
How Cumberland County compares
Cumberland County’s median of 5.8 pCi/L ranks #9 of 67 Pennsylvania counties with CDC data. The middle Pennsylvania county median is 3.8 pCi/L, so Cumberland County is above the state’s typical county. EPA puts the county in Zone 1, the highest-potential zone on EPA’s map (predicted average indoor level above 4 pCi/L).
These numbers come from tests homeowners and buyers chose to run, not a random survey. They show local risk; they cannot predict the level in your house.
Certified radon mitigation pros based in Cumberland County
Each listing below appears on Pennsylvania DEP’s certified mitigation list dated September 1, 2026. We show the city on file and the DEP certification number so you can confirm it.
American Radon Solutions, Inc.
Certified firm based in Camp Hill, PA
PA DEP certified mitigationCertification #1418
Precision Inspections & Radon Solut
Certified firm based in Mechanicsburg, PA
PA DEP certified mitigationCertification #3355
Jeremy Ling
Listed with: Precision Inspection (name cut short on the state list)
Certified individual based in Mechanicsburg, PA
PA DEP certified mitigationCertification #2404
Jooik Ro
Certified individual based in Carlisle, PA
PA DEP certified mitigationCertification #2760
Mike Sheely
Certified individual based in Enola, PA
PA DEP certified mitigationCertification #2691
Tuan Nguyen
Listed with: American Radon Sol
Certified individual based in Camp Hill, PA
PA DEP certified mitigationCertification #1419
Certified firms in neighboring counties
- Radon Protection Services Of Gettys (Gettysburg, Adams County)
- Enviroquest Inc (Harrisburg, Dauphin County)
- Absolute Radon Mitigation, LLC (York, York County)
Radon in counties next to Cumberland
| County | Median pCi/L | EPA zone |
|---|---|---|
| Adams, PA | 3.6 | Zone 1 (high) |
| Dauphin, PA | 4.8 | Zone 1 (high) |
| Franklin, PA | 6.0 | Zone 1 (high) |
| Perry, PA | 6.6 | Zone 1 (high) |
| York, PA | 5.4 | Zone 1 (high) |
What to do in Cumberland County
- Test your home. EPA recommends testing every home below the third floor, whatever the county average.
- Fix it at 4 pCi/L or higher. EPA also suggests considering a fix between 2 and 4 pCi/L.
- Use a certified pro. In Pennsylvania, radon mitigation for pay requires DEP certification. Check the number against the state list before you sign.
- Retest after the system is installed.
Sources
- County median radon levels and test counts: CDC Environmental Public Health Tracking Network, radon tests from labs, 10-year period 2008 to 2017 (ephtracking.cdc.gov).
- Radon zones: U.S. EPA Map of Radon Zones (epa.gov/radon).
- Certified mitigation firms and individuals: Pennsylvania DEP list of certified radon mitigation firms dated September 1, 2026 (PDF), checked October 24, 2026.
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