radon levels in PA homes 3

https://charlie-wiki.win/index.php/Radon_Mitigation_Cost_York:_What_Homeowners_Need_to_Know_About_Testing_and_Remediation

Radon levels in PA homes can be surprisingly high, especially in basements and lower floors. This naturally occurring radioactive gas seeps from soil into houses, and in Pennsylvania, around 40% of homes test above the EPA action level. The good news is testing is simple, often done with a basic kit from a hardware store. I've seen houses in Bucks County where levels were almost double the recommended limit, but after installing a proper vent system, they dropped to near zero. It's something ev…