Radon is a radioactive gas. It is the second leading cause of lung cancer deaths in the United States next to smoking and is thought to be the number one cause of lung cancer deaths in non-smokers. It 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 old homes, well sealed and drafty homes, and homes with or without basements.
Radon from soil gas is the main cause of radon problems. Sometimes radon enters the home through well water. In a small number of homes, the building materials can give off radon, too. However, building materials rarely cause radon problems by themselves. Any home may have a radon problem. Nearly 1 out of every 15 homes in the U.S. is estimated to have elevated radon levels. Elevated levels of radon gas have been found in homes in your state. Contact your state radon office (see back cover) for general information about radon in your area. While radon problems may be more common in some areas, any home may have a problem. The only way to know about your home is to test. Radon can also be a problem in schools and workplaces.
For additional information visit: http://www.epa.gov/iaq/radon/