radon o'fallon mo 3

https://thestcharlescountyradonmag.oakmontscope.com/posts/understanding-st-charles-county-radon-risks-and-what-homeowners-can-do

Radon in O'Fallon, MO, is a silent concern many homeowners might not think about until they test for it. The area's soil composition can allow this radioactive gas to seep into basements, especially during colder months. A friend found elevated levels in their home after a simple test kit from the hardware store, and they quickly installed a mitigation system. It’s worth checking if you live there, since you can’t see or smell it.