Short answer: the median radon test in Westmoreland County was 3.1 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 Westmoreland County compares
Westmoreland County’s median of 3.1 pCi/L ranks #50 of 67 Pennsylvania counties with CDC data. The middle Pennsylvania county median is 3.8 pCi/L, so Westmoreland 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 Westmoreland 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.
Main Street Radon Remediation
Certified firm based in Irwin, PA
PA DEP certified mitigationCertification #3690
Restoration Contracting Services In
Certified firm based in New Kensington, PA
PA DEP certified mitigationCertification #3220
Alexander Martin
Certified individual based in New Florence, PA
PA DEP certified mitigationCertification #3631
Chad Warhold
Listed with: Main Street Radon Rem (name cut short on the state list)
Certified individual based in Irwin, PA
PA DEP certified mitigationCertification #3689
Jerry A. Petrill
Certified individual based in Greensburg, PA
PA DEP certified mitigationCertification #1801
Mathew Blank
Certified individual based in Trafford, PA
PA DEP certified mitigationCertification #3696
Michael Bonura Jr.
Listed with: Restoration
Certified individual based in New Kensington, PA
PA DEP certified mitigationCertification #3219
Certified firms in neighboring counties
- Steel City Radon (Pittsburgh, Allegheny County)
- Kennihan Plumbing And Heating Inc (Valencia, Butler County)
- Home Radon Pros (Venetia, Washington County)
Radon in counties next to Westmoreland
| County | Median pCi/L | EPA zone |
|---|---|---|
| Allegheny, PA | 2.9 | Zone 1 (high) |
| Armstrong, PA | 4.8 | Zone 1 (high) |
| Butler, PA | 3.8 | Zone 1 (high) |
| Cambria, PA | 3.5 | Zone 2 (moderate) |
| Fayette, PA | 2.8 | Zone 2 (moderate) |
| Indiana, PA | 4.2 | Zone 1 (high) |
| Somerset, PA | 3.5 | Zone 2 (moderate) |
| Washington, PA | 3.0 | Zone 2 (moderate) |
What to do in Westmoreland 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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