What is radon?
Radon is a naturally occurring radioactive gas. It is invisible and has no odor or taste. It comes from the normal decay of uranium and thorium. These are two chemical elements that can be found in soil, rock, and groundwater. Radon breaks down quickly, giving off radioactive particles. Over time, breathing in high levels of these particles can cause lung cancer.
How would I be exposed to radon?
Outdoors, there are low levels of radon in the air. But radon can also be indoors. It can enter homes and buildings through cracks in the floors, walls, or foundations. Certain building materials can give off radon. And sometimes radon gets inside through well water.
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- Radon (National Library of Medicine)What is radon? Radon is a naturally occurring radioactive gas. It is invisible and has no odor or taste. It comes from the ... can be found in soil, rock, and groundwater. Radon breaks down quickly, giving off radioactive particles. Over ...
- ... and Stories View All January 3, 2025 Español Radon and Your Health At a glance Radon-associated ... a radon reduction system, if needed. What is Radon? Radon is an odorless, invisible, radioactive gas naturally ...
- Radon in Schools (Environmental Protection Agency)Radon/Learn More ... Radon ... High levels of Radon have been found in a number of schools across the country. Therefore, it is important that students, teachers ...
- Radon/Learn More ... Radon ... National Institute of Environmental Health Sciences ... From the National Institutes of Health ... Radon is a naturally occurring radioactive ...
- Radon (Environmental Protection Agency)Exposure to radon is the second leading cause of lung cancer after smoking. Radon is a colorless, odorless, tasteless and invisible gas ... Air > Indoor Air Pollution, Radiation & Radioactive Substances > Radon
- Find a Radon Test Kit or Measurement and Mitigation Professional (Environmental Protection Agency)Radon/Learn More ... Radon ... Environmental Protection Agency ... Find a qualified radon service professional to fix or mitigate your home. If you have questions about ...
- Lung Cancer/Related Issues ... Lung Cancer ... Radon/Learn More ... Radon ... National Cancer Institute ... A fact sheet about radon, an odorless radioactive gas, and its possible ...
- Inside Story: A Guide to Indoor Air Quality (Consumer Product Safety Commission)Indoor Air Pollution/Start Here ... Indoor Air Pollution ... Consumer Product Safety Commission ... Information provided in this safety guide is based on current scientific ...
- Lung Cancer Risk Factors (Centers for Disease Control and Prevention)Tobacco smoke, radon, and other things can increase your risk.
- Learning about Radon: A Part of Nature (Environmental Protection Agency) - PDFRadon/Learn More ... Radon
(Centers for Disease Control and Prevention) 
(National Institute of Environmental Health Sciences) 