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

Delaware Residents click HERE for your free radon test kit. Is there a killer in your basement? According to both the U.S. Environmental Protection Agency and the American Lung Association, radon is the …

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, …

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 …

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 …

Oct 31, 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 …

Jul 16, 2025 · Learn about radon, how it affects lung health and what you can do about it. What Is Radon? Radon is a colorless, tasteless and odorless gas that causes lung cancer. Exposure to …

Check radon levels by zip code in your area with our updated database. Learn how to safeguard your home from radon exposure by seeing radon levels by zip code.

Learn how to test for radon, place devices correctly, read results, and decide next steps to keep your home and family safe from hidden gas all year round.

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.