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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 645 cities.

Updated October 19, 2026

Highest city

478.9Bq/m³

Okanagan

Canada city average

118.7Bq/m³

across 645 cities

Above action level

73/ 645

cities

Showing the 100 highest of 645 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
6Carman, Manitoba324.7 Bq/m³
1.6× over
7Parrsboro, Nova Scotia324.5 Bq/m³
1.6× over
8Dauphin, Manitoba323.0 Bq/m³
1.6× over
9Elkford, British Columbia318.3 Bq/m³
1.6× over
10Swan River, Manitoba311.6 Bq/m³
1.6× over
11Lumsden, Saskatchewan304.2 Bq/m³
1.5× over
12Weyburn, Saskatchewan290.1 Bq/m³
1.5× over
13Chandler, Quebec289.6 Bq/m³
1.4× over
14Castlegar, British Columbia288.9 Bq/m³
1.4× over
15Gaspe, Quebec287.5 Bq/m³
1.4× over
16Shawville, Quebec285.4 Bq/m³
1.4× over
17Dryden, Ontario280.1 Bq/m³
1.4× over
18Lumby, British Columbia278.7 Bq/m³
1.4× over
19Kindersley, Saskatchewan276.3 Bq/m³
1.4× over
20Fort Macleod, Alberta275.4 Bq/m³
1.4× over
21Campbellton, New Brunswick274.2 Bq/m³
1.4× over
22Peachland, British Columbia272.8 Bq/m³
1.4× over
23Tracadie-Sheila, New Brunswick272.4 Bq/m³
1.4× over
24Esterhazy, Saskatchewan270.7 Bq/m³
1.4× over
25Kimberley, British Columbia269.1 Bq/m³
1.3× over
26Shellbrook, Saskatchewan265.6 Bq/m³
1.3× over
27Roblin, Manitoba263.5 Bq/m³
1.3× over
28Tisdale, Saskatchewan257.6 Bq/m³
1.3× over
29Rocky Mountain House, Alberta256.3 Bq/m³
1.3× over
30Regina, Saskatchewan255.7 Bq/m³
1.3× over
31Sparwood, British Columbia255.6 Bq/m³
1.3× over
32Brant, Ontario255.5 Bq/m³
1.3× over
33Chase, British Columbia250.8 Bq/m³
1.3× over
34Rimbey, Alberta244.7 Bq/m³
1.2× over
35Terrace, British Columbia243.8 Bq/m³
1.2× over
36Creston, British Columbia243.4 Bq/m³
1.2× over
37Atikokan, Ontario241.4 Bq/m³
1.2× over
38Sylvan Lake, Alberta239.8 Bq/m³
1.2× over
39Alberton, Prince Edward Island239.2 Bq/m³
1.2× over
40Thurso, Quebec238.4 Bq/m³
1.2× over
41Florenceville-Bristol, New Brunswick238.0 Bq/m³
1.2× over
42Invermere, British Columbia237.7 Bq/m³
1.2× over
43Carlyle, Saskatchewan236.2 Bq/m³
1.2× over
44Plessisville, Quebec234.3 Bq/m³
1.2× over
45Sainte-Anne-des-Monts, Quebec228.8 Bq/m³
1.1× over
46Sundre, Alberta228.4 Bq/m³
1.1× over
47Miramichi, New Brunswick227.3 Bq/m³
1.1× over
48Amherst, Nova Scotia226.0 Bq/m³
1.1× over
49Morris, Manitoba225.5 Bq/m³
1.1× over
50Outlook, Saskatchewan225.5 Bq/m³
1.1× over
51Salmo, British Columbia224.5 Bq/m³
1.1× over
52Morden, Manitoba224.0 Bq/m³
1.1× over
53Nakusp, British Columbia222.8 Bq/m³
1.1× over
54Deux-Montagnes, Quebec222.6 Bq/m³
1.1× over
55Beauceville, Quebec221.1 Bq/m³
1.1× over
56Portage la Prairie, Manitoba219.6 Bq/m³
1.1× over
57La Ronge, Saskatchewan218.4 Bq/m³
1.1× over
58Mont-Laurier, Quebec216.8 Bq/m³
1.1× over
59Riviere-Rouge, Quebec216.6 Bq/m³
1.1× over
60Hinton, Alberta216.2 Bq/m³
1.1× over
61Flin Flon, Manitoba214.8 Bq/m³
1.1× over
62Kensington, Prince Edward Island211.7 Bq/m³
1.1× over
63Hay River, Northwest Territories210.5 Bq/m³
1.1× over
64Carleton-sur-Mer, Quebec209.5 Bq/m³
1.0× over
65Fossambault-sur-lac, Quebec208.0 Bq/m³
1.0× over
66Hanna, Alberta207.2 Bq/m³
1.0× over
67Pasadena, Newfoundland And Labrador207.0 Bq/m³
1.0× over
68Black Diamond, Alberta206.2 Bq/m³
1.0× over
69Grand Forks, British Columbia206.1 Bq/m³
1.0× over
70Stephenville, Newfoundland And Labrador204.1 Bq/m³
1.0× over
71Maniwaki, Quebec203.3 Bq/m³
1.0× over
72Bellechasse Regional County Municipality, Quebec202.3 Bq/m³
1.0× over
73Winkler, Manitoba200.2 Bq/m³
1.0× over
✓ Below EPA action level (200 Bq/m³)
74Killarney, Manitoba199.7 Bq/m³
1.0× under
75Langham, Saskatchewan199.7 Bq/m³
1.0× under
76Vernon, British Columbia199.0 Bq/m³
1.0× under
77New-Richmond, Quebec198.5 Bq/m³
1.0× under
78Bathurst, New Brunswick197.3 Bq/m³
1.0× under
79Dorchester, Ontario197.3 Bq/m³
1.0× under
80Crossfield, Alberta196.8 Bq/m³
1.0× under
81Edmundston, New Brunswick196.6 Bq/m³
1.0× under
82Sydney, Nova Scotia195.6 Bq/m³
1.0× under
83Deer Lake, Newfoundland And Labrador194.7 Bq/m³
1.0× under
84Mont-Joli, Quebec194.3 Bq/m³
1.0× under
85Shaunavon, Saskatchewan192.7 Bq/m³
1.0× under
86Beaconsfield, Quebec190.9 Bq/m³
1.0× under
87Cornwall, Prince Edward Island190.4 Bq/m³
1.0× under
88Nanton, Alberta189.8 Bq/m³
0.9× under
89Renfrew, Ontario188.6 Bq/m³
0.9× under
90Swift Current, Saskatchewan187.8 Bq/m³
0.9× under
91Boissevain, Manitoba187.7 Bq/m³
0.9× under
92Brandon, Manitoba186.8 Bq/m³
0.9× under
93Nackawic, New Brunswick186.8 Bq/m³
0.9× under
94Espanola, Ontario186.2 Bq/m³
0.9× under
95Smiths Falls, Ontario185.4 Bq/m³
0.9× under
96Stonewall, Manitoba185.4 Bq/m³
0.9× under
97Olds, Alberta185.3 Bq/m³
0.9× under
98Yorkton, Saskatchewan184.8 Bq/m³
0.9× under
99Claresholm, Alberta184.6 Bq/m³
0.9× under
100Gambo, Newfoundland And Labrador184.4 Bq/m³
0.9× under
See all Provinces ranked by radon level