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  1. Radon | Colorado Department of Public Health and Environment

    Learn what radon is, how it affects your health, and the steps you can take to protect yourself and your family. Radon is the leading cause of lung cancer among non-smokers in the United …

  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 | US EPA

    Jan 8, 2026 · 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 …

  4. Radon and Your Health | Radon | CDC

    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. …

  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 gas in homes: What to know - State Farm®

    3 days ago · Radon gas is odorless, colorless and the second leading cause of lung cancer. These are some common methods for assessing, preventing or removing it.

  7. 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 …

  8. Radon City of Fort Collins

    Radon is an invisible, odorless radioactive gas. It forms when uranium in soil breaks down naturally. Radon is everywhere, and Colorado has higher levels than other regions. Radon …

  9. Radon | American Lung Association

    3 days ago · 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 …

  10. 2026 Radon Awareness and Safety Guide - Respiratory Health …

    2026 Radon Awareness and Safety Guide What is Radon? Radon is an odorless, colorless, and tasteless radioactive gas caused by the decay of uranium in soil. Exposure to radon can …