radon levels st louis 2

https://stlouishomeradontestinfo.keystonescope.com/posts/why-st.-louis-home-radon-test-matters-for-buyers-and-sellers

Radon levels in St. Louis can be a concern, especially in basements and crawl spaces, since the area has pockets of uranium-bearing rock underground. Many homes, particularly older ones, might trap this invisible gas without proper ventilation or mitigation systems. Local health officials recommend testing every few years because radon is the second leading cause of lung cancer, and I've known neighbors who found elevated readings after a simple test. It's worth looking up your specific zip cod…