radon measurement 2
https://getradonbasementworld.northcrestbrief.com/posts/understanding-radon-in-basement-why-testing-matters-for-st.-louis-homes
Radon measurement involves using specialized detectors to track the levels of this invisible, odorless radioactive gas that seeps from the ground into homes. I grab a small monitor, place it in the lowest lived-in area for a few weeks, then mail it off for lab analysis. Knowing the results matters because long-term exposure can harm your lungs—yet it's a silent hazard you can easily fix once you measure it.