radon test results 2

https://radonbasementnews.inkharbory.com/posts/understanding-radon-in-basement-what-st.-louis-homeowners-need-to-know

The radon test results from the basement came back at 5.2 pCi/L, which is above the EPA's action level of 4.0. We need to install a mitigation system soon; the long-term test we ran for 90 days confirmed the initial short-term findings, so this isn't a fluke. It's unsettling to think about breathing that in every day.