If you're a homeowner near St. Charles worried about radon, mitigation here usually starts with testing in your basement or crawlspace since the local clay soils can trap the gas. Once levels are confirmed, a contractor will likely install a sub-slab suction system—a pipe and fan setup that pulls radon from under the foundation and vents it safely above the roofline. It's a straightforward fix that can bring your home's radon down to safe levels, and many locals recommend sealing cracks first t… radon mitigation st charles 9