st louis home radon test 4

https://radontestduringhomeblog.solsticebrief.com/posts/why-a-radon-test-during-home-inspection-matters-for-st.-louis-buyers

When I bought my 1920s St. Louis bungalow last year, the home inspector strongly recommended a radon test since many older homes in the region have elevated levels due to soil composition. I ordered a simple charcoal test kit from the local health department, placed it in the basement for the required 48 hours, and sent it to the lab. Sure enough, the results came back at 3.8 pCi/L—just below the EPA action level of 4.0, but high enough that I installed a mitigation system anyway for peace of m…