Millions of Canadian Homes Face Hidden Cancer Risk from Radon
Radon, an invisible and odorless radioactive gas, is present in millions of Canadian homes and can cause lung cancer. Experts warn that roughly one in five houses now has high radon levels, more than double the number recorded in the late 2000s. Each year, radon exposure contributes to an estimated 3,200 lung cancer deaths in Canada.
Scientists point out that modern construction and home renovations may be increasing the risk. “We are very efficient at keeping heat inside our homes, especially in cold climates,” said Pawel Mekarski, head of radon technical operations at Health Canada. “When we make homes more airtight during renovations, we often fail to introduce proper ventilation, which traps radon indoors.”
New Building Codes Aim to Reduce Radon Exposure
A recent update to Canada’s national building code requires all newly built homes to include a passive radon stack. This stack acts like a chimney, helping to reduce indoor radon accumulation. While the code sets construction standards nationwide, provinces and territories must formally adopt it before implementation.
“We hope to see these systems in all future Canadian homes,” Mekarski added.
Testing Existing Homes Is Essential
Homeowners cannot rely solely on building codes to protect against radon. Testing is the only way to determine if a home has dangerous radon levels. Canadians can either hire professionals or use test kits, some of which are available for free through local libraries or public health units.
Health Canada recommends testing for at least 91 days, preferably three to 12 months, for accurate results. Testing should be conducted in colder months when doors and windows are closed, which traps radon inside.
Taking proactive measures now can save lives and reduce the risk of radon-related lung cancer in Canadian households.
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