Pennsylvania radon action level 6

https://quebeck-wiki.win/index.php/Navigating_Radon_Mitigation_for_Renters_in_York_County

In Pennsylvania, the radon action level is set at 4 picocuries per liter, meaning if your home tests at or above that, you're advised to take steps to reduce radon exposure. It's a common-sense threshold based on EPA guidelines, and many older homes in the state's geological regions can have elevated levels. Testing is simple and inexpensive; if you find high readings, a mitigation system can usually bring it down below that action level, reducing your long-term health risk naturally.