st charles county radon 3
https://radonfaninstallationplace.northstarcolumn.com/posts/what-to-expect-during-a-radon-fan-installation-in-st.-charles-county
Radon is a naturally occurring radioactive gas that can seep into homes from the soil, and St. Charles County has areas with elevated potential. Testing your home is the only way to know the levels, and mitigation can reduce health risks. Many local hardware stores sell test kits, and the county health department provides guidance.