radon test during home inspection 4

https://myradontestresultsview.summitquill.com/posts/understanding-your-radon-test-results-what-st.-louis-homeowners-need-to-know

When we bought our house, the inspector pulled out a small canister to test for radon, explaining that this colorless, odorless gas can seep from the ground and build up in basements. He placed it in the lowest livable area for two days, then sent it to a lab. The results came back low, so we were relieved, but a friend found levels high enough to require expensive mitigation. It's a simple test that can save you from long-term health risks.