Radon is a naturally occurring radioactive gas. It is released during the natural decay of uranium, which is found in most rock and soil and its occurrence in the state is influenced primarily by geology. Although certain areas of the state are more likely to encounter radon problems than other areas, radon is a house-to-house issue. You may live in an area of low radon potential yet; your house can have elevated radon while your neighbor's house has no radon. Radon is odorless, invisible, and without taste, and cannot be detected with the human senses. The only way to detect it is to test for it.