radon mitigation for old homes 2

https://mag-wiki.win/index.php/Understanding_Radon_in_Well_Water:_What_Homeowners_Should_Know

If you've got an older home with a basement or crawlspace, radon can be a sneaky issue. It comes from the ground and seeps in through cracks and gaps, building up over time. I've seen folks test their air and get a surprise. Fixing it often means sealing up those entry points and installing a simple vent system to pull the gas out. It's not glamorous, but it makes the house a whole lot safer.