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Where to test for radon
Choose the right room for a radon test, then the right spot in it: height, distance from walls, windows and vents, using Health Canada's placement guidance.
Radon tools and calculators
Free radon calculators and tools for Canadian homes: interpret a result, convert units, choose where to test, check a device or a retest, and find funding.
Each card below is one tool, in the order a homeowner usually needs them, from planning a test to finding help. Every tool prints its method on its page, so you can work out the result by hand.
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Radon result interpreter
Enter your radon level and test length to see where it sits against Canada's 200 Bq/m³ guideline, whether the test was long enough, and what to do next.
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Radon retest checker
Check whether your home needs a new radon test based on your last result, when it was taken, and renovations, mitigation or other changes since.
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Radon device checker
Look up a radon detector to see its C-NRPP performance listing, its Health Canada recall status and whether it is due for replacement, each with its date.
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Radon unit converter
Convert a radon reading between pCi/L and Bq/m³, with the conversion factor and its source, and see where the result sits against Canada's guideline.
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Radon funding finder
Free radon test kits, grants, rebates and library monitor loans by province and territory in Canada, each with its status and the date it was last checked.
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Radon map explorer
Explore Cross-Canada Radon Survey results by region, province, city and census division, with the source, weighting and sample for every figure.