radon levels in PA homes 2

https://radonbasementpennsylvaniablog.brightpathdigest.com/posts/radon-in-basement-pennsylvania-a-persistent-health-risk-demands-attention

Many Pennsylvania homes, especially those with basements or in areas with certain geology, can have elevated radon levels. This naturally occurring radioactive gas seeps in from the soil, and since you can't see, smell, or taste it, the only way to know your home's level is to test it. I had a friend in Bucks County find their finished basement was well above the EPA action level, which was a real wake-up call about long-term lung cancer risk.