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

Radon is a colorless, odorless, tasteless and chemically inert radioactive gas. It is formed by the natural radioactive decay of uranium in rock, soil and water. Testing for radon is the only way to know how …

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 …

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, …

Dec 11, 2025 · Radon, chemical element, a heavy radioactive gas of Group 18 (noble gases) of the periodic table, generated by the radioactive decay of radium. It is a colorless gas, 7.5 times heavier …

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.

Sep 10, 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.

Dec 14, 2025 · Radon monitors will soon be available at Columbus libraries. Here's what to know about the deadly gas.

2 days ago · PORTLAND, Maine — Health officials are emphasizing the importance of testing homes for radon this month. That’s because January is National Radon Action Month. Radon is a radioactive …

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