Deborah has lived in her home since 2003. She was concerned with the level of radon in her home. Radon is the second leading cause of lung cancer in the United States. Radon gets trapped in the lowest level of homes and buildings and can be dangerous to you and your family. Radon levels in the air are measured in units of radioactivity per volume of air. According to the U.S. EPA, the average level of radon in a home is about 1.3 pCi/L. The EPA recommends fixing your home if the radon level is above 4 pCi/L. However, no level of radon is safe it is important to keep your home and family safe.