Radon is found all over the world.  It is a naturally occurring colorless, odorless, tasteless radioactive gas produced by the breakdown of uranium and radium in soil, rock and water. 

The EPA and Surgeon General have warned that exposure to Radon is the second leading cause of lung cancer in the United States. An estimated 15,000 to 22,000 deaths per year.

Radon can be found all over the World. Radon problems have been identified in every state. The EPA estimates that nearly 1 in every 15 homes in the U.S. has indoor radon levels at or above the recommended action guideline level of 4 picocuries per liter (4 pCi/L) on a yearly average.

Any home may have a Radon problem; new, old, well-sealed, drafty, and homes with or without basements. The EPA and Surgeon General recommend testing all homes below the 3rd floor.

To get an accurate understanding of the Radon level in a home, long term testing of 90 days or more should be done, since levels in a home can vary greatly going from safe to dangerous in short periods of time. 

The EPA and the Centers for Disease Control recommend fixing a home with Radon levels that exceed 4 pCi/L (4 picocuries per liter, a measurement of radioactivity per volume of air) on a long-term basis.

Radon comes from the natural (radioactive) breakdown of uranium in soil, rock and water and gets into the air we breathe.  Radon gas decays into radioactive particles that can get trapped in your lungs when you breathe. As they break down further, these particles release small bursts of energy. This can damage lung tissue and lead to lung cancer.