radon levels st louis 4

https://quebeck-wiki.win/index.php/Understanding_Radon_System_Installation_Cost_in_St._Louis

Radon levels in St. Louis vary a lot by neighborhood, with some areas showing higher readings due to the region's limestone and shale geology. I've seen test results from homes in the city and County that exceed the EPA action level, especially in basements and lower floors. It's one of those invisible risks that's easy to ignore, but local real estate agents and health departments encourage testing because you really can't predict it without a kit. After a few friends found surprising numbers…