Canada Provinces Ranked by Indoor Radon Levels
Measured averages from Airthings devices across Canada. Action level: 200 Bq/m³ — the threshold at which remediation is recommended.
Northwest Territories has the highest average indoor radon in Canada at 133.8 Bq/m³, based on Airthings device measurements across 13 provinces.
Updated October 19, 2026
Highest
133.8Bq/m³
Northwest Territories
Canada average
84.8Bq/m³
across all provinces
Above action level
0/ 13
provinces
| # | Location | Avg level | vs action level |
|---|---|---|---|
| 1 | Northwest Territories | 133.8 Bq/m³ | 0.7× under |
| 2 | Yukon | 122.4 Bq/m³ | 0.6× under |
| 3 | Prince Edward Island | 111.7 Bq/m³ | 0.6× under |
| 4 | Saskatchewan | 109.5 Bq/m³ | 0.5× under |
| 5 | Manitoba | 90.9 Bq/m³ | 0.5× under |
| 6 | Newfoundland And Labrador | 90.0 Bq/m³ | 0.4× under |
| 7 | New Brunswick | 83.7 Bq/m³ | 0.4× under |
| 8 | Alberta | 82.9 Bq/m³ | 0.4× under |
| 9 | Nova Scotia | 81.4 Bq/m³ | 0.4× under |
| 10 | Quebec | 70.8 Bq/m³ | 0.4× under |
| 11 | Ontario | 60.5 Bq/m³ | 0.3× under |
| 12 | British Columbia | 60.3 Bq/m³ | 0.3× under |
| 13 | Nunavut | 4.1 Bq/m³ | 0.0× under |