Radon is a radioactive gas that has been found in homes all over the United States. It comes from the natural breakdown of uranium in soil, rock, water and gets in the air you breathe. Radon typically moves up through the ground to the air and into cracks and other holes in a home. Any type of home can have radon problems. This means new and old homes, well sealed and drafty homes and all types of foundations including slabs. If your home has high radon levels, your family will likely get your greatest radiation exposure at home.
You cannot predict the radon levels based on state, local or neighborhood radon measurements. Homes next to each other can have different indoor radon levels. Testing is the only way to find out the radon levels in a home. The Surgeon General warns that radon is the second leading cause of lung cancer behind smoking. If you smoke and your home has high radon levels, your risk of lung cancer is especially high.