Radon | US EPA

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Radon

January is National Radon Action Month

Radon is invisible - you can't see or smell it, but it can be deadly. Take action against the second leading cause of lung cancer. Test your nest today!
Find a radon test kit
Meet the Clean Air Superheroes!

Join Mateo and his friends as they learn about radon indoors and become superheroes defeating it in their homes. Follow along through fun, comic-book style illustrations and complete interactive activities.
Join the adventure

Radon is a naturally occurring radioactive gas that can cause lung cancer.

You can’t see or smell radon. Testing is the only way to know your level of exposure. Radon can have a big impact on your health and indoor air quality. All homes should be tested for radon.

Learn how you can reduce your risk and exposure to radon.
Protect your family
Read about the national multisector strategies to prevent exposure to radon.
Help advance NRAP goals
Review technical standards for radon professionals.
Learn about current standards
Search most common questions or send a question to our customer care team.
Find answers
Access resources on the EPA’s State and Tribal Indoor Radon Grants (SIRG) program.
Review SIRG resources
Stay informed and help communicate strategies to reduce radon risk.
Discover radon resources