Radon is an odorless, invisible radioactive gas. It's naturally released from rocks, soil and water—and it can get trapped inside homes, offices or schools. There's no known safe level of radon. There ...

There is a silent threat building up in the basements and crawl spaces of millions of American homes, and most people have no idea it is there. Radon is a naturally occurring radioactive gas that is ...

In Colorado, as of 2025, about 500 people a year die from lung cancer as the result of radon gas exposure. Nationally, the number of lung cancer deaths attributed to radon is about 21,000 per year.