Radon Awareness
Radon is the second leading cause of lung cancer in the United States, and it could be in your home right now.
What Is Radon?
Radon is a naturally occurring, invisible, odorless radioactive gas produced by the breakdown of uranium in soil, rock, and water. It seeps into homes through cracks in foundations, walls, and around pipes. When radon is inhaled, radioactive particles can damage cells lining the lungs, leading to lung cancer over time.
The EPA estimates that radon causes approximately 21,000 lung cancer deaths per year in the U.S., making it the leading cause of lung cancer among non-smokers.
Sources: EPA radon health information.
You cannot see it.
You can test for it.
The EPA recommends fixing your home when the radon level is 4 pCi/L or higher. Consider reducing levels between 2 and 4 pCi/L, too.
EPA action level
There is no known safe level of radon exposure. The scale highlights the EPA’s action thresholds; it does not show individual cancer risk. EPA guidance on radon levels.
Testing & Mitigation
Every home should be tested for radon. Testing is simple, affordable, and could save your life.
Test Your Home
Use a radon test kit or a qualified testing professional, and follow the instructions for placement and duration. Short-term and long-term tests are available. Your state radon program can help you find testing options.
EPA Action Level
The EPA recommends taking action if your radon level is 4 pCi/L or higher. Even levels between 2–4 pCi/L warrant consideration for mitigation, as there is no known safe level of radon exposure.
Radon Mitigation
A qualified radon mitigation professional can recommend a system to reduce radon in your home. A vent pipe and fan is one common approach. The appropriate system and cost depend on the property; test again after mitigation to confirm the result.
Beyond Smoking & Radon
While smoking and radon are the top two causes, other factors can also increase lung cancer risk.
Secondhand Smoke
Exposure to secondhand smoke increases lung cancer risk by 20–30% in non-smokers.
Asbestos
Occupational exposure to asbestos fibers significantly increases lung cancer risk, especially in combination with smoking.
Air Pollution
Long-term exposure to fine particulate matter (PM2.5) in outdoor air is a recognized lung cancer risk factor.
Family History
A family history of lung cancer may increase your risk, even if you have never smoked.