Pennsylvania Radon Testing & Mitigation — All Cities

Pennsylvania has the highest radon exposure risk of any state in the continental U.S. Approximately 40% of homes in EPA Zone 1 counties — concentrated along the Reading Prong in Berks, Lehigh, Northampton, and Montgomery counties — test above the 4.0 pCi/L action level. Zone 2 coverage extends through the Cumberland Valley limestone belt, south-central counties, and the Marcellus Shale region of north-central PA.

This directory connects Pennsylvania homeowners with DEP-certified radon mitigation and testing professionals in every major city. All contractors referenced through PA Radon Hub hold current PA DEP certification under PA Code § 240. PA Radon Hub is an independent informational resource — not a service provider.

Browse radon risk by county: Pennsylvania County Radon Index →