Radon is an invisible radioactive gas found in soil and rocks. It seeps into your home through cracks in the foundation, walls and joints. Any home can have high radon levels, whether it is old or new, has a basement or is built on a slab. Radon is the leading cause of lung cancer in non-smokers and the second leading cause in smokers. Test your home to find out if you and your family are at risk from exposure to radon.