Radon is the second leading cause of lung cancer in the United States and is estimated to be responsible for more than 20,000 lung cancer deaths each year.

You can’t see, smell, or taste radon—it’s a radioactive gas that comes from the natural breakdown of uranium in soil, rock, and water and gets into the air you breathe. Radon can be present outdoors and in any type of building, but you’re likely to get the most exposure to radon in your own home.

To help protect your health, you can test your home for radon and take measures to lower radon levels if needed.

Is a colorless, odorless, deadly gas seeping into your home? Unless you test your home for radon, you’ll never know.

Radon is the number one cause of lung cancer among non-smokers, and overall it is the second leading cause of lung cancer. It’s responsible for about 21,000 lung cancer deaths each year, and about one in 15 homes have elevated radon levels.

Radon comes from the natural breakdown of uranium in soil, rock and water and gets into the air you breathe. It can be found all over the United States, and it can get into any type of building. Take action, and test your home. Test kits are inexpensive and widely available at hardware and home improvement stores. If a high radon level is detected in your home, you can take steps to fix the problem to protect yourself and your family.

Learn more about testing for radon in your home during national radon action month.