Indoor Air Quality
Radon
Indoor radon averages, risk categories, and geology notes for 70 communities. Sourced from Health Canada Cross-Canada Radon Survey data.
Indoor air quality
Radon Levels Across Canada
Mean indoor radon, homes above the Health Canada reference level, and regional geology for every tracked community.
From geology to indoor levels
Understanding Radon Risk By City
Radon is a colourless, odourless gas that varies house to house. Each community page shows mean indoor radon levels, the share of homes above 200 Bq/m³, risk category, and underlying geology — drawn from Health Canada's national survey data.
Browse by region
All Provinces & Territories
Select a province to explore local radon profiles
Featured communities
Highest Mean Radon Levels
Communities with the highest average indoor radon in our sample
Burnaby, BC
279 Bq/m³ avg · 19% above 200
Explore →Belleville - Quinte West, ON
279 Bq/m³ avg · 49% above 200
Explore →Centre Wellington, ON
279 Bq/m³ avg · 34% above 200
Explore →Dolbeau-Mistassini, QC
278 Bq/m³ avg · 28% above 200
Explore →Winkler, MB
276 Bq/m³ avg · 21% above 200
Explore →Kentville, NS
276 Bq/m³ avg · 21% above 200
Explore →Mississauga, ON
275 Bq/m³ avg · 20% above 200
Explore →Spruce Grove, AB
274 Bq/m³ avg · 39% above 200
Explore →Test Your Home
Explore radon levels for Canadian communities — mean concentrations, risk categories, and geology on every city page.
Mitigation guide