radon levels in Pennsylvania 2

https://astro-wiki.win/index.php/Pennsylvania_Radon_Certification_Standards_See_Increased_Scrutiny_Amid_Home_Sales

Radon levels in Pennsylvania are a serious concern due to the state's geology, particularly in regions with underlying granite and shale. This naturally occurring radioactive gas can seep into homes, posing long-term health risks. Testing is recommended, especially in basements, to ensure safe indoor air. Many areas, like the Reading Prong, show elevated readings, so mitigation systems are common for affected households.