Understanding your
radon test results.
Got a number back and not sure what it means? Here's how to read it against Health Canada's guideline of 200 Bq/m³ — and what each range means for your home.
Health Canada's official action level — the point at which they recommend you actively reduce your radon levels. It's not a hard line between "safe" and "dangerous"; it's the threshold where the science says the risk clearly outweighs the cost of fixing it.
How results are measured
Your result comes back as a number in becquerels per cubic metre (Bq/m³) — essentially how much radioactivity is in the air you're breathing. The number itself matters less than where it sits relative to the guideline below.
What your number means.
Find your result in the ranges below to see where your home stands and what the next step looks like.
Below the World Health Organization's stricter guideline. This is the range mitigation systems typically aim for — no action needed.
Below Health Canada's action level, but above the WHO guideline. Some homeowners choose to monitor or retest over a longer period.
Retesting or a professional consultation is worth considering. Levels this close to the threshold can climb into the action range seasonally.
This is Health Canada's action level. Mitigation is recommended to bring your home back below the guideline.
Not sure what to do with your result?
Bring us your number and we'll translate it into a clear recommendation for your home — free, and with no obligation.
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