Radon is a contaminant that affects indoor air quality worldwide. Because radon is denser than air it accumulates in basements and crawlspaces under dwellings.

Feb 16, 2024 · Radon is an odorless and invisible radioactive gas naturally released from rocks, soil, and water. Radon can get trapped inside homes and buildings, and build up in the air. Over time, …

Radon is a radioactive substance, which means it emits radiation (a type of energy). Radiation can damage your cells, leading to cancer. Experts estimate that radon exposure is the second most …

Nov 13, 2025 · 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 …

Oct 27, 2023 · 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. On October 27, 2023, new …

Apr 13, 2023 · Long-term exposure to high levels of radon can be dangerous to your health. Learn where you’re likely to find high levels of radon, how to test for it, and how it can impact your health.

Jun 5, 2025 · Radon is a naturally occurring radioactive gas that is colorless and odorless. Radon comes from the natural decay of uranium or thorium, elements found in rocks, soils, and water.

Information about how radon gets into your home, how it affects you, and how to reduce it.

6 days ago · Radon is a naturally occurring radioactive gas that can enter homes from the ground and build up to dangerous levels. Learn how you can reduce your risk and exposure to radon. For …

National Radon Program Services by Cooperative Agreement between the US EPA and Kansas State University 2005 Research Park Cir - Manhattan, KS 66502 | 1-800-SOS-RADON (767-7236) …