radon levels in Pennsylvania 3

https://delta-wiki.win/index.php/New_Guidance_on_Home_Radon_Mitigation_Highlights_Growing_Health_Concerns

Radon levels in Pennsylvania are a serious concern due to the state's geology, with high concentrations found in many homes. Testing is advised, especially in basements, as this radioactive gas can seep in from the soil and increase lung cancer risk over time.