Pennsylvania radon action level 5

https://star-wiki.win/index.php/Why_Radon_Testing_for_Home_Buyers_Is_a_Non-Negotiable_Step_in_York_County

The Pennsylvania radon action level is set at 4 pCi/L, which means if your home's radon test shows a level at or above that, the state strongly recommends taking steps to fix it. Radon is a naturally occurring radioactive gas that can seep into basements and crawlspaces, and long-term exposure is linked to lung cancer. Mitigation can involve sealing cracks or installing a venting system, and it's a good idea to retest after any fixes to make sure levels drop below that threshold. Many Pennsylva…