radon mitigation west st louis county
https://radonlevelsstlouiscountyfacts.inkharbory.com/posts/understanding-radon-levels-st-louis-county-a-homeowner-s-guide
We just had radon mitigation done in west st louis county after our home test showed high levels. The crew sealed the basement slab cracks and installed a vent pipe system that pulls radon from below the foundation and exhausts it above the roofline. It took them a day and a half, and the follow-up test came back well below the EPA action level. Now we finally feel safe spending time in the basement.