Radon is a naturally occurring, radioactive gas that can pose serious health risks when it accumulates indoors.

The EPA recommends taking action if your home or building is found to have a radon level higher than 4.0 pCi/L. Over time, exposure to higher levels of radon could lead to lung cancer.

It's most commonly associated with basements, but it can creep up to the first floor of a home if allowed to. According to the EPA, radon causes about 21,000 lung cancer deaths in the U.S. each ...

Findings reveal that nearly 25% of the U.S. population may be exposed to radon concentrations exceeding 148 Bq/m3, a level associated with cancer risks.

Radon levels of just 4 pCi/L are equivalent to smoking eight cigarettes per day, while inhaling 100 pCi/L amounts to 200 cigarettes per day. Plessinger has also seen firsthand how levels can vary from ...

Radon levels are usually higher in homes during the winter months, when temperatures freeze the ground, trapping the gas in the soil. At-home tests cost $10 to $12 and can be purchased at a ...