Radon and cancer
The International Agency for Research on Cancer (IARC) classifies radon as a known cause of cancer. Exposure to radon gas increases your risk of lung cancer. This risk depends on how much radon you are exposed to and for how long, as well as if you are a smoker.
Health Canada estimates that about 16% of lung cancer deaths are related to being exposed to radon in the home. Radon exposure is the leading cause of lung cancer in non-smokers and it’s estimated that in Canada there are more than 3,300 lung cancer deaths related to radon each year. If you smoke, you are at an even higher risk of developing lung cancer if you are exposed to radon.