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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 September 28, 2026

Highest city

478.9Bq/m³

Okanagan

Canada city average

118.5Bq/m³

across 645 cities

Above action level

75/ 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, Saskatchewan306.6 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
15Lumby, British Columbia287.7 Bq/m³
1.4× over
16Gaspe, Quebec282.5 Bq/m³
1.4× over
17Shawville, Quebec281.7 Bq/m³
1.4× over
18Kindersley, Saskatchewan281.4 Bq/m³
1.4× over
19Dryden, Ontario280.1 Bq/m³
1.4× over
20Tracadie-Sheila, New Brunswick276.7 Bq/m³
1.4× over
21Peachland, British Columbia276.1 Bq/m³
1.4× over
22Fort Macleod, Alberta275.4 Bq/m³
1.4× over
23Campbellton, New Brunswick274.2 Bq/m³
1.4× over
24Roblin, Manitoba273.0 Bq/m³
1.4× over
25Esterhazy, Saskatchewan270.7 Bq/m³
1.4× over
26Kimberley, British Columbia269.1 Bq/m³
1.3× over
27Terrace, British Columbia266.1 Bq/m³
1.3× over
28Shellbrook, Saskatchewan265.6 Bq/m³
1.3× over
29Tisdale, Saskatchewan257.6 Bq/m³
1.3× over
30Regina, Saskatchewan256.6 Bq/m³
1.3× over
31Rocky Mountain House, Alberta256.3 Bq/m³
1.3× over
32Sparwood, British Columbia255.6 Bq/m³
1.3× over
33Brant, Ontario255.5 Bq/m³
1.3× over
34Chase, British Columbia250.8 Bq/m³
1.3× over
35Florenceville-Bristol, New Brunswick250.8 Bq/m³
1.3× over
36Rimbey, Alberta244.7 Bq/m³
1.2× over
37Atikokan, Ontario241.4 Bq/m³
1.2× over
38Sylvan Lake, Alberta239.8 Bq/m³
1.2× over
39Thurso, Quebec238.4 Bq/m³
1.2× over
40Amherst, Nova Scotia237.5 Bq/m³
1.2× over
41Carlyle, Saskatchewan236.2 Bq/m³
1.2× over
42Salmo, British Columbia235.0 Bq/m³
1.2× over
43Plessisville, Quebec234.3 Bq/m³
1.2× over
44Creston, British Columbia233.4 Bq/m³
1.2× over
45Invermere, British Columbia231.6 Bq/m³
1.2× over
46Sainte-Anne-des-Monts, Quebec228.8 Bq/m³
1.1× over
47Miramichi, New Brunswick227.3 Bq/m³
1.1× over
48Beauceville, Quebec226.1 Bq/m³
1.1× over
49Morris, Manitoba225.5 Bq/m³
1.1× over
50Outlook, Saskatchewan225.5 Bq/m³
1.1× over
51Sundre, Alberta224.4 Bq/m³
1.1× over
52Morden, Manitoba224.0 Bq/m³
1.1× over
53Nakusp, British Columbia222.8 Bq/m³
1.1× over
54New-Richmond, Quebec220.5 Bq/m³
1.1× over
55Alberton, Prince Edward Island220.1 Bq/m³
1.1× over
56Deux-Montagnes, Quebec219.6 Bq/m³
1.1× over
57La Ronge, Saskatchewan218.4 Bq/m³
1.1× over
58Riviere-Rouge, Quebec216.6 Bq/m³
1.1× over
59Hinton, Alberta216.2 Bq/m³
1.1× over
60Mont-Laurier, Quebec215.9 Bq/m³
1.1× over
61Portage la Prairie, Manitoba215.4 Bq/m³
1.1× over
62Flin Flon, Manitoba214.8 Bq/m³
1.1× over
63Killarney, Manitoba213.4 Bq/m³
1.1× over
64Grand Forks, British Columbia213.1 Bq/m³
1.1× over
65Kensington, Prince Edward Island211.4 Bq/m³
1.1× over
66Carleton-sur-Mer, Quebec209.5 Bq/m³
1.0× over
67Fossambault-sur-lac, Quebec208.0 Bq/m³
1.0× over
68Hanna, Alberta207.2 Bq/m³
1.0× over
69Pasadena, Newfoundland And Labrador207.0 Bq/m³
1.0× over
70Black Diamond, Alberta206.2 Bq/m³
1.0× over
71Hay River, Northwest Territories205.0 Bq/m³
1.0× over
72Stephenville, Newfoundland And Labrador204.1 Bq/m³
1.0× over
73Maniwaki, Quebec202.5 Bq/m³
1.0× over
74Vernon, British Columbia201.4 Bq/m³
1.0× over
75Winkler, Manitoba200.2 Bq/m³
1.0× over
✓ Below EPA action level (200 Bq/m³)
76Dorchester, Ontario199.8 Bq/m³
1.0× under
77Langham, Saskatchewan199.7 Bq/m³
1.0× under
78Mont-Joli, Quebec198.4 Bq/m³
1.0× under
79Sydney, Nova Scotia197.2 Bq/m³
1.0× under
80Crossfield, Alberta196.8 Bq/m³
1.0× under
81Edmundston, New Brunswick196.6 Bq/m³
1.0× under
82Bellechasse Regional County Municipality, Quebec195.0 Bq/m³
1.0× under
83Deer Lake, Newfoundland And Labrador194.7 Bq/m³
1.0× under
84Bathurst, New Brunswick194.5 Bq/m³
1.0× under
85Cornwall, Prince Edward Island193.4 Bq/m³
1.0× under
86Shaunavon, Saskatchewan192.7 Bq/m³
1.0× under
87Renfrew, Ontario192.5 Bq/m³
1.0× under
88Beaconsfield, Quebec190.4 Bq/m³
1.0× under
89Nanton, Alberta189.8 Bq/m³
0.9× under
90Swift Current, Saskatchewan189.0 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
95Coaticook, Quebec186.1 Bq/m³
0.9× under
96Oka, Quebec185.9 Bq/m³
0.9× under
97Bay Roberts, Newfoundland And Labrador185.8 Bq/m³
0.9× under
98Stonewall, Manitoba185.5 Bq/m³
0.9× under
99Olds, Alberta185.3 Bq/m³
0.9× under
100Smiths Falls, Ontario185.0 Bq/m³
0.9× under
See all Provinces ranked by radon level