Short answer: the median radon test in Allegheny County was 2.9 pCi/L (CDC, lab tests 2008 to 2017). That is under EPA’s action level of 4 pCi/L but in the 2 to 4 range where EPA suggests considering a fix. Because it is a median, many homes in the county tested higher.
How Allegheny County compares
Allegheny County’s median of 2.9 pCi/L ranks #55 of 67 Pennsylvania counties with CDC data. The middle Pennsylvania county median is 3.8 pCi/L, so Allegheny County is below 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 Allegheny 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.
Steel City Radon
Certified firm based in Pittsburgh, PA
PA DEP certified mitigationCertification #2002
Brian C. Bacchus
Certified individual based in Wexford, PA
PA DEP certified mitigationCertification #1771
Jon Shaffer
Certified individual based in Pittsburgh, PA
PA DEP certified mitigationCertification #2499
Michael Nowicki
Listed with: Steel City Radon (name cut short on the state list)
Certified individual based in Pittsburgh, PA
PA DEP certified mitigationCertification #2038
Steven Buffone
Certified individual based in Pittsburgh, PA
PA DEP certified mitigationCertification #3700
Certified firms in neighboring counties
- Radon Detection And Control (South Heights, Beaver County)
- Kennihan Plumbing And Heating Inc (Valencia, Butler County)
- Home Radon Pros (Venetia, Washington County)
- Main Street Radon Remediation (Irwin, Westmoreland County)
- Restoration Contracting Services In (New Kensington, Westmoreland County)
Radon in counties next to Allegheny
| County | Median pCi/L | EPA zone |
|---|---|---|
| Beaver, PA | 3.9 | Zone 1 (high) |
| Butler, PA | 3.8 | Zone 1 (high) |
| Washington, PA | 3.0 | Zone 2 (moderate) |
| Westmoreland, PA | 3.1 | Zone 1 (high) |
What to do in Allegheny 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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