Radon is a radioactive gas. You can’t see, taste, or smell Radon, but it may be a problem in your home. Radon comes from the natural decay of uranium that is found in nearly all soils. It typically moves up through the ground to the air above and into your home through cracks and other holes in the foundation. Your home traps Radon inside, where it can build up. Any home may have a Radon problem. This means new and older homes, well-sealed as well as drafty homes, and both homes with and without basements. According to the Pennsylvania Department of Environmental Protection, an estimated 40% of the homes in Pennsylvania are believed to have elevated radon levels.