Canada Radon reproduces published survey aggregates and cites Health Canada guidance. It does not operate a laboratory or invent missing municipal readings. Method detail: methodology.

Primary sources

• Cross-Canada Survey of Radon Concentrations in Homes (Health Canada / Open Government). Community mean Bq/m³ and share of tested homes at or above 200 Bq/m³.
• Radon overview and indoor air guidance (Health Canada). 200 Bq/m³ guideline framing and public testing advice.
• Radon reduction guide for Canadians (Health Canada). Mitigation timing and reduction practice context.
• Canadian National Radon Proficiency Program (C-NRPP). Certified measurement and mitigation professional directory.

Licence

Survey products used here typically release under the Open Government Licence – Canada. Confirm the licence statement on each downloaded file.

Corrections

If a city figure is wrong, email contact@openstats.ca with the page URL, the field, the expected value, and a link to the official document. Verified corrections land in the next scheduled refresh.