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British Columbia Cities Ranked by Indoor Radon Levels

Measured averages from Airthings devices across British Columbia, Canada. Action level: 200 Bq/m³ — the threshold at which remediation is recommended.

Okanagan has the highest measured indoor radon in British Columbia at 478.9 Bq/m³, based on Airthings measurements across 86 cities.

Updated August 16, 2026

Highest city

478.9Bq/m³

Okanagan

British Columbia city average

104.4Bq/m³

across 86 cities

Above action level

15/ 86

cities

British Columbia Cities Ranked by Indoor Radon Levels
#LocationAvg levelMonitorsvs action level
1Okanagan478.9 Bq/m³9
2.4× over
2Castlegar288.8 Bq/m³86
1.4× over
3Lumby287.7 Bq/m³14
1.4× over
4Elkford281.5 Bq/m³8
1.4× over
5Peachland280.4 Bq/m³35
1.4× over
6Terrace274.4 Bq/m³16
1.4× over
7Kimberley269.1 Bq/m³20
1.3× over
8Sparwood255.6 Bq/m³32
1.3× over
9Salmo249.2 Bq/m³7
1.2× over
10Invermere231.6 Bq/m³48
1.2× over
11Creston228.7 Bq/m³18
1.1× over
12Nakusp222.8 Bq/m³9
1.1× over
13Grand Forks216.6 Bq/m³22
1.1× over
14Chase203.1 Bq/m³23
1.0× over
15Vernon203.0 Bq/m³146
1.0× over
✓ Below EPA action level (200 Bq/m³)
16Trail189.8 Bq/m³16
0.9× under
17Penticton185.4 Bq/m³96
0.9× under
18West Kelowna177.4 Bq/m³164
0.9× under
19Fernie175.1 Bq/m³38
0.9× under
20Salmon Arm172.3 Bq/m³64
0.9× under
21Princeton169.1 Bq/m³21
0.8× under
22Cranbrook155.1 Bq/m³41
0.8× under
23Nelson152.7 Bq/m³122
0.8× under
24Oliver152.5 Bq/m³19
0.8× under
25Prince George147.3 Bq/m³138
0.7× under
26Kelowna143.7 Bq/m³409
0.7× under
27Osoyoos141.6 Bq/m³14
0.7× under
28Armstrong140.6 Bq/m³12
0.7× under
29Rossland139.3 Bq/m³16
0.7× under
30Revelstoke129.6 Bq/m³41
0.6× under
31Fruitvale125.7 Bq/m³8
0.6× under
32Summerland122.8 Bq/m³33
0.6× under
33Sicamous119.5 Bq/m³13
0.6× under
34Williams Lake110.6 Bq/m³20
0.6× under
35Vanderhoof110.3 Bq/m³13
0.6× under
36Enderby105.1 Bq/m³6
0.5× under
37Fort St. John103.7 Bq/m³33
0.5× under
38Golden102.2 Bq/m³20
0.5× under
39Chetwynd93.9 Bq/m³6
0.5× under
40Ladysmith85.4 Bq/m³14
0.4× under
41Dawson Creek83.2 Bq/m³15
0.4× under
42Cache Creek76.3 Bq/m³13
0.4× under
43Quesnel72.7 Bq/m³15
0.4× under
44Chilliwack68.2 Bq/m³111
0.3× under
45Kamloops66.2 Bq/m³131
0.3× under
46North Cowichan64.4 Bq/m³13
0.3× under
47Colwood59.1 Bq/m³22
0.3× under
48North Saanich49.8 Bq/m³70
0.2× under
49Courtenay49.3 Bq/m³34
0.2× under
50Sooke49.2 Bq/m³10
0.2× under
51Lake Cowichan41.1 Bq/m³11
0.2× under
52Agassiz40.6 Bq/m³13
0.2× under
53Anmore40.5 Bq/m³20
0.2× under
54Lions Bay39.8 Bq/m³30
0.2× under
55Langford37.0 Bq/m³33
0.2× under
56Abbotsford36.6 Bq/m³85
0.2× under
57Parksville36.5 Bq/m³39
0.2× under
58Duncan35.7 Bq/m³33
0.2× under
59West Vancouver33.0 Bq/m³74
0.2× under
60Whistler31.1 Bq/m³21
0.2× under
61Nanaimo30.9 Bq/m³62
0.2× under
62Bowen Island30.7 Bq/m³17
0.2× under
63Sechelt28.2 Bq/m³14
0.1× under
64Victoria28.2 Bq/m³161
0.1× under
65Walnut Grove27.9 Bq/m³34
0.1× under
66Aldergrove27.8 Bq/m³11
0.1× under
67North Vancouver26.1 Bq/m³216
0.1× under
68Oak Bay25.9 Bq/m³54
0.1× under
69Pitt Meadows24.7 Bq/m³31
0.1× under
70Smithers24.4 Bq/m³15
0.1× under
71Port Alberni23.5 Bq/m³17
0.1× under
72Gibsons20.9 Bq/m³6
0.1× under
73Coquitlam19.6 Bq/m³163
0.1× under
74White Rock19.3 Bq/m³82
0.1× under
75Langley18.5 Bq/m³84
0.1× under
76Surrey17.9 Bq/m³53
0.1× under
77New Westminster17.4 Bq/m³161
0.1× under
78Vancouver17.3 Bq/m³223
0.1× under
79Burnaby16.8 Bq/m³203
0.1× under
80Maple Ridge16.7 Bq/m³68
0.1× under
81Port Moody16.7 Bq/m³103
0.1× under
82West End16.1 Bq/m³311
0.1× under
83Delta14.9 Bq/m³33
0.1× under
84Ladner12.4 Bq/m³19
0.1× under
85Campbell River9.8 Bq/m³25
0.0× under
86Richmond9.1 Bq/m³98
0.0× under
See Canada cities ranked by radon levelSee all Provinces ranked by radon level