Radon is a naturally occurring radioactive gas that is formed from the decay of uranium in soil, rock, and water. It is colorless, odorless, and tasteless, which makes it impossible to detect without specialized testing. Radon can seep into homes and buildings through cracks and openings in the foundation. Prolonged exposure to high levels of radon can significantly increase the risk of lung cancer. According to the Environmental Protection Agency (EPA), radon is the second leading cause of lung cancer in the United States making it a serious health concern for homeowners.