Why 40% of Pennsylvania Homes Fail Radon Tests

Pennsylvania has the highest residential radon exposure rates in the nation, with 40% of homes exceeding the EPA’s 4.0 pCi/L action level. This video traces the geological forces behind the crisis—from the billion-year-old Reading Prong granite belt to Marcellus Shale deposits—and explains why certain regions face dramatically elevated risk. Learn what radon testing protocols exist, when mitigation is required, and how DEP-certified professionals assess and address elevated levels.