Proudly Canadian
Radon Gas in Canadian Homes: Testing and Mitigation
Health Canada's guideline, long-term testing and how mitigation works.
Radon can be present in homes in every province. The only way to know your level is to test, and testing is simple.
Why radon matters
Health Canada identifies radon as a leading cause of lung cancer after smoking. It comes from uranium breaking down in soil and enters through foundation cracks, sumps and gaps around pipes.
How to test
Health Canada recommends a long-term test of at least three months. Place the detector in the lowest lived-in level of the home, following kit instructions, then send it to the lab.
What mitigation looks like
- Sub-slab depressurization: a pipe and fan draw radon from under the slab and vent it outside
- Sealing cracks and openings
- Improving ventilation
- Retesting after installation
Choosing a professional
Look for a professional certified under the Canadian National Radon Proficiency Program (C-NRPP). Ask for a written plan and retest after the system is installed.
Common questions
Yes. Age and construction don't rule it out.
Short tests give a snapshot. Health Canada recommends long-term testing.
From hardware stores, lung associations or C-NRPP professionals.