BISMARCK, ND (KXNET) — January is National Radon Month, a time to assess the threat you face from this naturally-occurring radioactive gas. You can't see it or taste it or smell it — but you can test for it. And it can be a health threat to you in North Dakota. Radon is the leading cause of lung cancer deaths among nonsmokers in America, and claims the lives of about 21,000 Americans each year. In fact, the EPA and the U.S. Surgeon General urge all Americans to protect their health by testing their homes, schools, and other buildings for radon. The gas is literally found just about everywhere in the United States, but North Dakota is among the states where radon levels are well above normal and at a point where your health could be affected. According to the North Dakota Department of Environmental Quality, radon gas continually seeps into the air from the ground.  Concentrations are low outside because the gas is quickly diluted in the air.  In poorly ventilated areas and enclosed spaces, however, radon concentrations can build up.  What to know about potential hospital project in Minot There are test kits available, ranging in price from $10 to $30 or more. In North Dakota, you can request a free radon test kit from the state. Testing is simple: You place collection containers in lower areas of your home, basement, or garage. You leave the test collectors in place for anywhere from a few hours to a day or so, depending on the kit. Then you seal things up and send them in for testing. Results can take a few days to several weeks. If radon is detected at unhealthy levels, you'll be given tips on what you can do to lower the radon exposure in your home. You can also go to the Department of Environmental Quality's radon page for tips and advice, and relatively simple ways to fix a radon problem if one is found in your home. For everything you need to know about radon — from what it is to what to do about it, visit the environmental quality page, as well as the Environmental Protection Agency's radon page. Close Thanks for signing up! Watch for us in your inbox. Subscribe Now Today's Top Stories SIGN UP NOW