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  1. Radon | US EPA

    4 days ago · 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 …

  2. Radon - Wikipedia

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

  3. Radon - Department of Health and Human Services

    Radon is a cancer-causing natural radioactive gas that you can't see, smell, or taste. If present in your home, it may pose a danger to you and your family's health.

  4. Radon and Your Health | Radon | CDC

    Dec 11, 2025 · Radon is an odorless, invisible, radioactive gas naturally released from rocks, soil, and water. Radon can get into homes and buildings through soil, small cracks or holes in your …

  5. Radon Gas: Causes, Exposure, Symptoms & Complications

    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 …

  6. Radon | Definition, Properties, Effects, & Facts | Britannica

    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 …

  7. Invisible Danger: Lung Association Urges Home Testing for ...

    Jan 5, 2026 · January is National Radon Action Month, and the American Lung Association is raising awareness of the potential health risks of radon and the importance of home testing. …

  8. Radon | National Institute of Environmental Health Sciences

    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, …

  9. Radon risk: Nebraska homes face high levels of radioactive gas

    Jan 2, 2026 · Radon exposure is the leading cause of lung cancer among non-smokers, with the EPA estimating it causes about 21,000 lung cancer deaths annually in the U.S. The risk is …

  10. Half of Colorado homes have elevated radon levels, which can ...

    Jan 5, 2026 · We encourage all Colorado homeowners to test regardless of their neighbors’ radon levels because radon levels vary from home to home. Homeowners who already have radon …