Canada Cities Ranked by Indoor Radon Levels
Measured averages from Airthings devices across Canada. Action level: 200 Bq/m³ — the threshold at which remediation is recommended.
Okanagan, British Columbia has the highest measured indoor radon of any Canada city at 478.9 Bq/m³, based on Airthings measurements across 615 cities.
Updated August 16, 2026
Highest city
478.9Bq/m³
Okanagan
Canada city average
117.7Bq/m³
across 615 cities
Above action level
72/ 615
cities
Showing the 100 highest of 615 ranked Canada cities. For the full list in one place, open a state ranking below.
| # | Location | Avg level | Monitors | vs action level |
|---|---|---|---|---|
| 1 | Okanagan, British Columbia | 478.9 Bq/m³ | 9 | 2.4× over |
| 2 | Altona, Manitoba | 428.0 Bq/m³ | 15 | 2.1× over |
| 3 | Rosetown, Saskatchewan | 352.2 Bq/m³ | 9 | 1.8× over |
| 4 | Wynyard, Saskatchewan | 349.4 Bq/m³ | 8 | 1.7× over |
| 5 | Dauphin, Manitoba | 327.0 Bq/m³ | 32 | 1.6× over |
| 6 | Carman, Manitoba | 324.7 Bq/m³ | 19 | 1.6× over |
| 7 | Swan River, Manitoba | 311.6 Bq/m³ | 11 | 1.6× over |
| 8 | Lumsden, Saskatchewan | 306.6 Bq/m³ | 38 | 1.5× over |
| 9 | Weyburn, Saskatchewan | 290.1 Bq/m³ | 19 | 1.5× over |
| 10 | Chandler, Quebec | 289.6 Bq/m³ | 7 | 1.4× over |
| 11 | Castlegar, British Columbia | 288.8 Bq/m³ | 86 | 1.4× over |
| 12 | Lumby, British Columbia | 287.7 Bq/m³ | 14 | 1.4× over |
| 13 | Tracadie-Sheila, New Brunswick | 281.8 Bq/m³ | 35 | 1.4× over |
| 14 | Elkford, British Columbia | 281.5 Bq/m³ | 8 | 1.4× over |
| 15 | Kindersley, Saskatchewan | 281.4 Bq/m³ | 25 | 1.4× over |
| 16 | Peachland, British Columbia | 280.4 Bq/m³ | 35 | 1.4× over |
| 17 | Dryden, Ontario | 280.1 Bq/m³ | 24 | 1.4× over |
| 18 | Gaspe, Quebec | 279.4 Bq/m³ | 25 | 1.4× over |
| 19 | Esterhazy, Saskatchewan | 277.6 Bq/m³ | 25 | 1.4× over |
| 20 | Terrace, British Columbia | 274.4 Bq/m³ | 16 | 1.4× over |
| 21 | Campbellton, New Brunswick | 274.2 Bq/m³ | 27 | 1.4× over |
| 22 | Roblin, Manitoba | 273.0 Bq/m³ | 8 | 1.4× over |
| 23 | Kimberley, British Columbia | 269.1 Bq/m³ | 20 | 1.3× over |
| 24 | Shellbrook, Saskatchewan | 265.6 Bq/m³ | 30 | 1.3× over |
| 25 | Regina, Saskatchewan | 257.6 Bq/m³ | 630 | 1.3× over |
| 26 | Tisdale, Saskatchewan | 257.6 Bq/m³ | 7 | 1.3× over |
| 27 | Rocky Mountain House, Alberta | 256.3 Bq/m³ | 19 | 1.3× over |
| 28 | Sparwood, British Columbia | 255.6 Bq/m³ | 32 | 1.3× over |
| 29 | Brant, Ontario | 255.5 Bq/m³ | 14 | 1.3× over |
| 30 | Amherst, Nova Scotia | 254.4 Bq/m³ | 8 | 1.3× over |
| 31 | New-Richmond, Quebec | 251.9 Bq/m³ | 14 | 1.3× over |
| 32 | Salmo, British Columbia | 249.2 Bq/m³ | 7 | 1.2× over |
| 33 | Rimbey, Alberta | 248.6 Bq/m³ | 14 | 1.2× over |
| 34 | Atikokan, Ontario | 241.4 Bq/m³ | 9 | 1.2× over |
| 35 | Sylvan Lake, Alberta | 239.8 Bq/m³ | 33 | 1.2× over |
| 36 | Thurso, Quebec | 238.4 Bq/m³ | 6 | 1.2× over |
| 37 | Plessisville, Quebec | 234.3 Bq/m³ | 11 | 1.2× over |
| 38 | Beauceville, Quebec | 233.9 Bq/m³ | 54 | 1.2× over |
| 39 | Shawville, Quebec | 231.9 Bq/m³ | 15 | 1.2× over |
| 40 | Invermere, British Columbia | 231.6 Bq/m³ | 48 | 1.2× over |
| 41 | Sainte-Anne-des-Monts, Quebec | 228.8 Bq/m³ | 10 | 1.1× over |
| 42 | Creston, British Columbia | 228.7 Bq/m³ | 18 | 1.1× over |
| 43 | Miramichi, New Brunswick | 226.2 Bq/m³ | 31 | 1.1× over |
| 44 | Morris, Manitoba | 225.5 Bq/m³ | 16 | 1.1× over |
| 45 | Outlook, Saskatchewan | 225.5 Bq/m³ | 10 | 1.1× over |
| 46 | Sundre, Alberta | 224.4 Bq/m³ | 8 | 1.1× over |
| 47 | Florenceville-Bristol, New Brunswick | 223.6 Bq/m³ | 8 | 1.1× over |
| 48 | Nakusp, British Columbia | 222.8 Bq/m³ | 9 | 1.1× over |
| 49 | Deux-Montagnes, Quebec | 220.5 Bq/m³ | 146 | 1.1× over |
| 50 | Alberton, Prince Edward Island | 220.1 Bq/m³ | 7 | 1.1× over |
| 51 | Mont-Laurier, Quebec | 219.5 Bq/m³ | 18 | 1.1× over |
| 52 | Morden, Manitoba | 219.1 Bq/m³ | 38 | 1.1× over |
| 53 | Portage la Prairie, Manitoba | 217.3 Bq/m³ | 39 | 1.1× over |
| 54 | Grand Forks, British Columbia | 216.6 Bq/m³ | 22 | 1.1× over |
| 55 | Riviere-Rouge, Quebec | 216.6 Bq/m³ | 14 | 1.1× over |
| 56 | Flin Flon, Manitoba | 214.8 Bq/m³ | 10 | 1.1× over |
| 57 | Labelle, Quebec | 213.9 Bq/m³ | 6 | 1.1× over |
| 58 | Kensington, Prince Edward Island | 209.7 Bq/m³ | 12 | 1.0× over |
| 59 | Fossambault-sur-lac, Quebec | 208.0 Bq/m³ | 9 | 1.0× over |
| 60 | Black Diamond, Alberta | 207.8 Bq/m³ | 55 | 1.0× over |
| 61 | Killarney, Manitoba | 206.0 Bq/m³ | 11 | 1.0× over |
| 62 | Nanton, Alberta | 206.0 Bq/m³ | 6 | 1.0× over |
| 63 | Bay Roberts, Newfoundland And Labrador | 205.9 Bq/m³ | 10 | 1.0× over |
| 64 | Hay River, Northwest Territories | 205.0 Bq/m³ | 23 | 1.0× over |
| 65 | Dorchester, Ontario | 204.7 Bq/m³ | 33 | 1.0× over |
| 66 | Carleton-sur-Mer, Quebec | 203.4 Bq/m³ | 14 | 1.0× over |
| 67 | Chase, British Columbia | 203.1 Bq/m³ | 23 | 1.0× over |
| 68 | Vernon, British Columbia | 203.0 Bq/m³ | 146 | 1.0× over |
| 69 | Bellechasse Regional County Municipality, Quebec | 202.9 Bq/m³ | 16 | 1.0× over |
| 70 | Maniwaki, Quebec | 201.5 Bq/m³ | 9 | 1.0× over |
| 71 | Winkler, Manitoba | 201.2 Bq/m³ | 21 | 1.0× over |
| 72 | Pasadena, Newfoundland And Labrador | 200.7 Bq/m³ | 6 | 1.0× over |
| ✓ Below EPA action level (200 Bq/m³) | ||||
| 73 | Langham, Saskatchewan | 199.7 Bq/m³ | 8 | 1.0× under |
| 74 | Sydney, Nova Scotia | 198.1 Bq/m³ | 50 | 1.0× under |
| 75 | Crossfield, Alberta | 196.8 Bq/m³ | 12 | 1.0× under |
| 76 | Edmundston, New Brunswick | 196.6 Bq/m³ | 44 | 1.0× under |
| 77 | Bathurst, New Brunswick | 195.9 Bq/m³ | 43 | 1.0× under |
| 78 | Cornwall, Prince Edward Island | 195.9 Bq/m³ | 30 | 1.0× under |
| 79 | Deer Lake, Newfoundland And Labrador | 194.7 Bq/m³ | 6 | 1.0× under |
| 80 | Shaunavon, Saskatchewan | 192.7 Bq/m³ | 21 | 1.0× under |
| 81 | Renfrew, Ontario | 192.5 Bq/m³ | 39 | 1.0× under |
| 82 | Trail, British Columbia | 189.8 Bq/m³ | 16 | 0.9× under |
| 83 | Oka, Quebec | 189.7 Bq/m³ | 31 | 0.9× under |
| 84 | Swift Current, Saskatchewan | 189.5 Bq/m³ | 60 | 0.9× under |
| 85 | Beaconsfield, Quebec | 189.3 Bq/m³ | 138 | 0.9× under |
| 86 | Mont-Joli, Quebec | 189.2 Bq/m³ | 21 | 0.9× under |
| 87 | Brandon, Manitoba | 188.8 Bq/m³ | 79 | 0.9× under |
| 88 | Stonewall, Manitoba | 188.0 Bq/m³ | 69 | 0.9× under |
| 89 | Nackawic, New Brunswick | 186.8 Bq/m³ | 10 | 0.9× under |
| 90 | Coaticook, Quebec | 186.3 Bq/m³ | 21 | 0.9× under |
| 91 | Espanola, Ontario | 186.2 Bq/m³ | 7 | 0.9× under |
| 92 | Penticton, British Columbia | 185.4 Bq/m³ | 96 | 0.9× under |
| 93 | Olds, Alberta | 185.3 Bq/m³ | 18 | 0.9× under |
| 94 | Smiths Falls, Ontario | 185.0 Bq/m³ | 74 | 0.9× under |
| 95 | Yorkton, Saskatchewan | 184.8 Bq/m³ | 16 | 0.9× under |
| 96 | Claresholm, Alberta | 184.6 Bq/m³ | 6 | 0.9× under |
| 97 | Gambo, Newfoundland And Labrador | 184.4 Bq/m³ | 10 | 0.9× under |
| 98 | Neebing, Ontario | 184.1 Bq/m³ | 8 | 0.9× under |
| 99 | Bancroft, Ontario | 183.5 Bq/m³ | 89 | 0.9× under |
| 100 | Moose Jaw, Saskatchewan | 183.3 Bq/m³ | 50 | 0.9× under |