1) What is Radon
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Radon is a naturally occurring radioactive gas produced by the breakdown of uranium in soil and rock.
It:
- Is colourless, odourless, and tasteless
- Enters homes through foundation cracks, slab joints, sump pits, and service penetrations
- Accumulates in lower levels (basements are highest risk)
Radon is the #1 cause of lung cancer among non-smokers in Canada.
2) Calgary Is a High Radon Area
Health Canada classifies much of Alberta — including Calgary — as high radon potential.
Key facts:
- Roughly 1 in 6 homes in Alberta test above the recommended limit.
- Radon levels vary house to house, even on the same street.
- Newer homes are not immune.
There is no “safe” neighbourhood assumption.
3) Acceptable Levels in Canada
According to Health Canada:
- Guideline level: 200 Bq/m³
- If above 200 Bq/m³ → mitigation recommended
- If above 600 Bq/m³ → urgent action
Testing must be:
- Long-term (minimum 3 months)
- Done during heating season (Oct–April ideal)
Short-term tests (48 hours) are less reliable.
The Digital Radon Detector that I use in my home can be purchased here .
https://www.airthings.com/en-ca/products/corentium-home-2-ca