Short answer: the median radon test in Lehigh County was 3.9 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 Lehigh County compares
Lehigh County’s median of 3.9 pCi/L ranks #31 of 67 Pennsylvania counties with CDC data. The middle Pennsylvania county median is 3.8 pCi/L, so Lehigh 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 Lehigh 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.
Integra Environmental LLC
Certified firm based in Allentown, PA
PA DEP certified mitigationCertification #3398
SWAT of PA
Certified firm based in Allentown, PA
PA DEP certified mitigationCertification #3567
Dale Metzger
Certified individual based in Macungie, PA
PA DEP certified mitigationCertification #2921
Dominic Romagnoli Jr
Listed with: Swat Of Pa
Certified individual based in Allentown, PA
PA DEP certified mitigationCertification #3272
Justin Clark-Bailey
Listed with: Bailey, Justin
Certified individual based in Allentown, PA
PA DEP certified mitigationCertification #3586
Tony Domingues
Listed with: Integra Environme (name cut short on the state list)
Certified individual based in Allentown, PA
PA DEP certified mitigationCertification #2621
Waqas Anwar
Certified individual based in Allentown, PA
PA DEP certified mitigationCertification #3318
Certified firms in neighboring counties
- S. J. Watras, Inc. (Boyertown, Berks County)
- Indoor Air Surgeons, LLC (Bensalem, Bucks County)
- The Radon Bros (Quakertown, Bucks County)
- Accurate Radon Control Inc (Green Lane, Montgomery County)
- Airotox (Lansdale, Montgomery County)
- Radon Technology & Enviromental Inc (Royersford, Montgomery County)
- Radon-Rid LLC (Phoenixville, Montgomery County)
Radon in counties next to Lehigh
| County | Median pCi/L | EPA zone |
|---|---|---|
| Berks, PA | 4.3 | Zone 1 (high) |
| Bucks, PA | 2.1 | Zone 1 (high) |
| Carbon, PA | 4.5 | Zone 1 (high) |
| Montgomery, PA | 2.2 | Zone 1 (high) |
| Northampton, PA | 4.0 | Zone 1 (high) |
| Schuylkill, PA | 5.0 | Zone 1 (high) |
What to do in Lehigh 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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