Canadian city radon rankings
Communities ordered by long-term average indoor radon from Health Canada's cross-Canada survey. Filter the table, then open a city atlas for testing context.
Highest average concentration — top 25
| Rank | Community | Province | Mean Bq/m³ | % above 200 Bq/m³ |
|---|---|---|---|---|
| 1 | Bathurst | New Brunswick | 385.1 | 42.2% |
| 2 | Regina | Saskatchewan | 301.7 | 56.3% |
| 3 | Niverville | Manitoba | 256.7 | 47.5% |
| 4 | Steinbach | Manitoba | 256.7 | 47.5% |
| 5 | Winnipeg | Manitoba | 256.7 | 47.5% |
| 6 | The Pas | Manitoba | 242.5 | 43.4% |
| 7 | Granby | Quebec | 238.2 | 24.0% |
| 8 | Sherbrooke | Quebec | 238.2 | 24.0% |
| 9 | Brandon | Manitoba | 202.9 | 36.2% |
| 10 | Dauphin | Manitoba | 202.9 | 36.2% |
| 11 | Neepawa | Manitoba | 202.9 | 36.2% |
| 12 | Campbellton | New Brunswick | 196.5 | 26.5% |
| 13 | Miramichi | New Brunswick | 195.2 | 32.8% |
| 14 | Halifax | Nova Scotia | 194.7 | 31.3% |
| 15 | Kentville | Nova Scotia | 194.7 | 31.3% |
| 16 | Truro | Nova Scotia | 194.7 | 31.3% |
| 17 | Castlegar | British Columbia | 190.9 | 30.8% |
| 18 | Nelson | British Columbia | 190.9 | 30.8% |
| 19 | Trail | British Columbia | 190.9 | 30.8% |
| 20 | Whitehorse | Yukon | 182.0 | 20.4% |
| 21 | Edmundston | New Brunswick | 178.3 | 30.9% |
| 22 | Grand Falls | New Brunswick | 178.3 | 30.9% |
| 23 | Cranbrook | British Columbia | 174.9 | 20.8% |
| 24 | Creston | British Columbia | 174.9 | 20.8% |
| 25 | Fernie | British Columbia | 174.9 | 20.8% |
Indoor radon guide · Radon atlas
Open radon atlas →How to read this ranking
This ranking is built from the same Health Canada Cross-Canada Survey of Radon Concentrations in Canadian Homes that supplies every city page on the OpenStats radon topic site. Each row opens that community's radon atlas page; matching City Score and pillar rankings live on openstats.ca. Regional proxies share a metro-area sample when no direct CMA reading exists (for example Moose Jaw and Weyburn use Regina CMA data).
Communities at the top cluster in parts of the Prairie provinces, the Kootenay region of British Columbia, and pockets of the Canadian Shield. Those elevated averages track uranium content and soil permeability in local bedrock.
A community average describes regional potential, not any single house. The only way to know the concentration in a specific home is to test that house. See the OpenStats guide to indoor radon in Canada for the guideline, long-term testing, and geology.
Related: Rankings hub · Compare cities · Methodology