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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 644 cities.

Updated August 30, 2026

Highest city

478.9Bq/m³

Okanagan

Canada city average

118.8Bq/m³

across 644 cities

Above action level

79/ 644

cities

Showing the 100 highest of 644 ranked Canada cities. For the full list in one place, open a state ranking below.

Canada Cities Ranked by Indoor Radon Levels
#LocationAvg levelvs action level
1Okanagan, British Columbia478.9 Bq/m³
2.4× over
2Kamsack, Saskatchewan476.9 Bq/m³
2.4× over
3Altona, Manitoba428.0 Bq/m³
2.1× over
4Rosetown, Saskatchewan352.2 Bq/m³
1.8× over
5Wynyard, Saskatchewan349.4 Bq/m³
1.7× over
6Dauphin, Manitoba327.0 Bq/m³
1.6× over
7Carman, Manitoba324.7 Bq/m³
1.6× over
8Parrsboro, Nova Scotia324.5 Bq/m³
1.6× over
9Swan River, Manitoba311.6 Bq/m³
1.6× over
10Lumsden, Saskatchewan306.6 Bq/m³
1.5× over
11Weyburn, Saskatchewan290.1 Bq/m³
1.5× over
12Chandler, Quebec289.6 Bq/m³
1.4× over
13Castlegar, British Columbia288.8 Bq/m³
1.4× over
14Lumby, British Columbia287.7 Bq/m³
1.4× over
15Tracadie-Sheila, New Brunswick281.8 Bq/m³
1.4× over
16Elkford, British Columbia281.5 Bq/m³
1.4× over
17Kindersley, Saskatchewan281.4 Bq/m³
1.4× over
18Peachland, British Columbia280.4 Bq/m³
1.4× over
19Dryden, Ontario280.1 Bq/m³
1.4× over
20Gaspe, Quebec279.4 Bq/m³
1.4× over
21Esterhazy, Saskatchewan277.6 Bq/m³
1.4× over
22Fort Macleod, Alberta275.4 Bq/m³
1.4× over
23Terrace, British Columbia274.4 Bq/m³
1.4× over
24Campbellton, New Brunswick274.2 Bq/m³
1.4× over
25Roblin, Manitoba273.0 Bq/m³
1.4× over
26Kimberley, British Columbia269.1 Bq/m³
1.3× over
27Shellbrook, Saskatchewan265.6 Bq/m³
1.3× over
28Tisdale, Saskatchewan257.6 Bq/m³
1.3× over
29Regina, Saskatchewan257.5 Bq/m³
1.3× over
30Rocky Mountain House, Alberta256.3 Bq/m³
1.3× over
31Sparwood, British Columbia255.6 Bq/m³
1.3× over
32Brant, Ontario255.5 Bq/m³
1.3× over
33Amherst, Nova Scotia254.4 Bq/m³
1.3× over
34New-Richmond, Quebec251.9 Bq/m³
1.3× over
35Chase, British Columbia250.8 Bq/m³
1.3× over
36Salmo, British Columbia249.2 Bq/m³
1.2× over
37Rimbey, Alberta248.6 Bq/m³
1.2× over
38Atikokan, Ontario241.4 Bq/m³
1.2× over
39Sylvan Lake, Alberta239.8 Bq/m³
1.2× over
40Thurso, Quebec238.4 Bq/m³
1.2× over
41La Ronge, Saskatchewan236.7 Bq/m³
1.2× over
42Carlyle, Saskatchewan236.2 Bq/m³
1.2× over
43Plessisville, Quebec234.3 Bq/m³
1.2× over
44Shawville, Quebec231.9 Bq/m³
1.2× over
45Invermere, British Columbia231.6 Bq/m³
1.2× over
46Beauceville, Quebec229.4 Bq/m³
1.1× over
47Sainte-Anne-des-Monts, Quebec228.8 Bq/m³
1.1× over
48Creston, British Columbia228.7 Bq/m³
1.1× over
49Miramichi, New Brunswick226.2 Bq/m³
1.1× over
50Morris, Manitoba225.5 Bq/m³
1.1× over
51Outlook, Saskatchewan225.5 Bq/m³
1.1× over
52Sundre, Alberta224.4 Bq/m³
1.1× over
53Florenceville-Bristol, New Brunswick223.6 Bq/m³
1.1× over
54Nakusp, British Columbia222.8 Bq/m³
1.1× over
55Deux-Montagnes, Quebec220.5 Bq/m³
1.1× over
56Alberton, Prince Edward Island220.1 Bq/m³
1.1× over
57Mont-Laurier, Quebec219.5 Bq/m³
1.1× over
58Morden, Manitoba219.1 Bq/m³
1.1× over
59Portage la Prairie, Manitoba217.3 Bq/m³
1.1× over
60Grand Forks, British Columbia216.6 Bq/m³
1.1× over
61Riviere-Rouge, Quebec216.6 Bq/m³
1.1× over
62Flin Flon, Manitoba214.8 Bq/m³
1.1× over
63Labelle, Quebec213.9 Bq/m³
1.1× over
64Kensington, Prince Edward Island209.7 Bq/m³
1.0× over
65Fossambault-sur-lac, Quebec208.0 Bq/m³
1.0× over
66Black Diamond, Alberta207.8 Bq/m³
1.0× over
67Hanna, Alberta207.2 Bq/m³
1.0× over
68Killarney, Manitoba206.0 Bq/m³
1.0× over
69Nanton, Alberta206.0 Bq/m³
1.0× over
70Bay Roberts, Newfoundland And Labrador205.9 Bq/m³
1.0× over
71Hay River, Northwest Territories205.0 Bq/m³
1.0× over
72Dorchester, Ontario204.7 Bq/m³
1.0× over
73Stephenville, Newfoundland And Labrador204.1 Bq/m³
1.0× over
74Carleton-sur-Mer, Quebec203.4 Bq/m³
1.0× over
75Vernon, British Columbia203.0 Bq/m³
1.0× over
76Bellechasse Regional County Municipality, Quebec202.9 Bq/m³
1.0× over
77Maniwaki, Quebec201.5 Bq/m³
1.0× over
78Winkler, Manitoba201.2 Bq/m³
1.0× over
79Pasadena, Newfoundland And Labrador200.7 Bq/m³
1.0× over
✓ Below EPA action level (200 Bq/m³)
80Langham, Saskatchewan199.7 Bq/m³
1.0× under
81Sydney, Nova Scotia198.1 Bq/m³
1.0× under
82Crossfield, Alberta196.8 Bq/m³
1.0× under
83Edmundston, New Brunswick196.6 Bq/m³
1.0× under
84Bathurst, New Brunswick195.9 Bq/m³
1.0× under
85Cornwall, Prince Edward Island195.9 Bq/m³
1.0× under
86Deer Lake, Newfoundland And Labrador194.7 Bq/m³
1.0× under
87Shaunavon, Saskatchewan192.7 Bq/m³
1.0× under
88Renfrew, Ontario192.5 Bq/m³
1.0× under
89Trail, British Columbia189.8 Bq/m³
0.9× under
90Oka, Quebec189.7 Bq/m³
0.9× under
91Swift Current, Saskatchewan189.5 Bq/m³
0.9× under
92Beaconsfield, Quebec189.3 Bq/m³
0.9× under
93Mont-Joli, Quebec189.2 Bq/m³
0.9× under
94Brandon, Manitoba188.6 Bq/m³
0.9× under
95Stonewall, Manitoba188.0 Bq/m³
0.9× under
96Boissevain, Manitoba187.7 Bq/m³
0.9× under
97Nackawic, New Brunswick186.8 Bq/m³
0.9× under
98Coaticook, Quebec186.3 Bq/m³
0.9× under
99Espanola, Ontario186.2 Bq/m³
0.9× under
100Penticton, British Columbia185.4 Bq/m³
0.9× under
See all Provinces ranked by radon level