What Is Radon And What Are The Risks Radon is a natuarlly occuring radioactive gas, a byproduct of uranium decay, that becomes dangerous when it builds up in your home. It escapes from soil into homes and buildings through cracks in solid floors, construction joints, wall cracks and cavities, gaps in suspended floors, gaps around service pipes, and even through the water supply. Because nearly all soils contain uranium, radon is everywhere (see interactive radon map of U.S.). You can’t see, smell or taste radon, but it could be present at a dangerous level in your home. Dangerously elevated levels…