Radon Across Canada — What the Data Shows
Radon is a national concern in Canada, but exposure risk is not uniform. Local geology, soil type, building stock, and climate all influence how much radon accumulates in homes. Understanding your region's risk profile is a good reason to test — but remember: the only way to know your actual level is to measure it.
Canada's National Context
Health Canada's National Radon Program has conducted cross-country surveys revealing that:
- Approximately 7% of Canadian homes have radon at or above the 200 Bq/m³ action level
- Canada has among the highest average residential radon concentrations of any country
- Radon is responsible for an estimated 3,200 lung cancer deaths per year in Canada
- About 16% of lung cancer deaths among non-smokers are attributed to radon exposure
Higher-Risk Regions
While every region of Canada has radon, certain areas have higher geological radon potential due to uranium-bearing granite, disturbed glacial soils, and other local factors. Higher-risk regions identified in Health Canada surveys include:
- British Columbia — Interior: The Okanagan Valley, Kootenays, and Thompson-Nicola regions show elevated average radon levels. Granite and metamorphic geology contribute to higher soil radon generation.
- Saskatchewan: Among the highest provincial averages in the country, particularly in Saskatoon and southern communities.
- Manitoba and northern Ontario
- New Brunswick: Fredericton area and portions of the St. John River Valley
- Nova Scotia: Parts of Cape Breton and areas with granite bedrock
Lower provincial averages have been recorded in Alberta, Quebec, and PEI — but elevated homes exist in every province. Regional risk is a predictor, not a guarantee.
Why Two Homes on the Same Street Can Be Different
Radon levels are hyper-local. Factors that cause variation between neighbouring homes include:
- Foundation type (poured concrete, block, slab-on-grade, crawlspace)
- Sub-slab material (gravel, sand, clay, or disturbed fill)
- Number and size of cracks or openings in the foundation
- Presence of a sump pit — open or covered
- HVAC system design and operation (pressure relationships)
- Occupant lifestyle (window use, ventilation habits)
Two identical homes built side-by-side can have radon levels an order of magnitude apart. This is why every home should be tested individually.
Testing Is the Only Answer
Health Canada recommends that all Canadians test their homes for radon, regardless of region. The cost is low ($59.95 for a lab-analyzed 90-day kit), the setup takes minutes, and the information is actionable.
Shop test kits → | How testing works →
If Your Level Is Elevated
Radon mitigation is effective regardless of region. An active sub-slab depressurization system works the same way whether you're in Kelowna, Saskatoon, or Halifax — reducing levels by 80–99% in most homes.
Learn how mitigation works → | Shop mitigation fans →
