Health Risks Associated With Radon Gas

  • Radon is the #1 cause of lung cancer among non-smokers.

  • A smoker who is exposed to radon gas has a significantly higher risk of getting lung cancer than smoking alone.

  • Higher radon levels and the length of time exposed to radon increase your lung cancer risk.

  • An estimated 3200 people die per year in Canada from radon related lung cancer.

Health Canada recommends that all homeowners test their homes for radon gas in the interest of their family's safety.

Lung Association's Radon Quiz

The World Health Organization (WHO) estimates that radon causes up to 15% of lung cancers worldwide. Radon is estimated to be responsible for approximately 3,000 lung cancer deaths every year in Canada alone and some 21,000 deaths in the US every year.


When you breathe in radon gas, some of the particles stay in your lung tissue and begin to decay. As the radon particles decay they release bursts of radiation that can damage the lung tissue cells. Over time the cell damage can lead to the development of cancer.


Your risk of developing lung cancer from radon depends on the concentration of radon in the air you breathe, and the length of time you are exposed. Recent studies by the WHO have confirmed that the lung cancer risk extends to radon levels well below the current standards in North America and Europe.


© 2011-2017 Canadian Association of Radon Scientists and Technologists (CARST/ACSTR). All rights reserved.

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