Radon (RN) is a toxic gas that is naturally occurring and is the result of the radioactive decay of uranium and radium. It is odorless, colorless, and tasteless, making it difficult to detect without specialized equipment. RADON is found in soil, rocks, and water, and can enter homes through cracks in the foundation or other openings. Exposure to high levels of RADON can cause lung cancer, making it a serious health hazard.