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Certified radon testers and mitigators in Pennsylvania

337 certified radon testers and mitigation contractors in Pennsylvania, from the state's official list or the national NRPP directory.

39 cities & counties337 certified pros

Source: PA DEP Radon Services Directory, list dated Oct 1, 2026. Get Radon Quotes is independent and not affiliated with the PA Department of Environmental Protection. Certifications expire, so check before you hire: Verify a certification or call the PA Radon Hotline at 800-237-2366.

Pennsylvania requires anyone who tests for radon or installs mitigation systems to be certified by the Department of Environmental Protection. Thanks to its geology, nearly every county in the state has locations with high radon levels.

Major cities

Pittsburgh 24Philadelphia 8Doylestown 5Erie 5

Counties in Pennsylvania A–Z

Smaller counties in Pennsylvania

Counties with only a few listings so far, grouped by county.

Bedford County 1

Bradford County 1

Carbon County 2

Clearfield County 1

Clinton County 2

Columbia County 2

Elk County 1

Indiana County 2

Lawrence County 2

Mifflin County 1

Northumberland County 1

Perry County 1

Snyder County 2

Somerset County 1

Susquehanna County 1

Tioga County 1

Union County 1

Venango County 2

Warren County 1

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