Check Your Local Canadian Radon Level
Radon exposure is the leading cause of lung cancer in non-smokers. Explore average residential radon by province, health region, and postal area — based on 11,168 long-term measurements. Health Canada's indoor Action Level is 200 Bq/m³.
Toggle this switch to see how future radon levels could increase (by up to 2.6 times) in modern, energy-efficient homes with less fresh air ventilation.
Based on building science data from the 2024 Cross-Canada Radon Survey.
What Is Your Radon Risk?
Enter your postal code to see local radon exposure for your area and learn what the numbers mean for your home.
Learn about radon
Short guides to testing, safe levels, health effects, and reducing radon in your home.
Why radon is the leading cause of lung cancer in non-smokers and what to watch for.
Long-term kits vs real-time monitors — the only way to know your number.
What to do once your reading exceeds 200 Bq/m³, plus typical costs in Canada.
Canada's 200 Bq/m³ guideline, the WHO 100 Bq/m³ reference, and how to read your result.
See local radon exposure for your area and how it compares to the national average.
Provinces ranked by mean indoor radon
| Province / Territory | Readings | Mean | Relative mean | % ≥ 200 |
|---|---|---|---|---|
| NBNew Brunswick | 728 | 203 | 28.3% | |
| YTYukon Territory | 216 | 182 | 20.4% | |
| MBManitoba | 1,102 | 160 | 25.4% | |
| SKSaskatchewan | 1,169 | 130 | 16.9% | |
| NSNova Scotia | 428 | 126 | 12.1% | |
| QCQuebec | 1,348 | 104 | 13.4% | |
| BCBritish Columbia | 1,162 | 103 | 12.3% | |
| ABAlberta | 1,077 | 96 | 7.0% | |
| ONOntario | 3,231 | 95 | 8.9% | |
| NLNewfoundland and Labrador | 479 | 87 | 8.8% | |
| NTNorthwest Territories | 146 | 86 | 6.8% | |
| PEPrince Edward Island | 71 | 68 | 5.6% | |
| NUNunavut | 11 | 25 | 0.0% |
Health regions with highest exposure
Ranked by share of homes at or above 200 Bq/m³ (min. 20 readings).
- MBParkland45%
- MBBrandon44%
- MBCentral43%
- NBRegion 642%
- MBAssiniboine36%
- NBRegion 733%
- NBRegion 431%
- BCKootenay/Boundary31%
- QCGaspesie - Iles-de-la-Madeleine30%
- NBRegion 527%
Highest-mean postal areas (FSA)
Forward sortation areas with the highest mean radon (min. 10 readings).
- R6MMB · n=13477
- E2ANB · n=20467
- R7NMB · n=31453
- V2MBC · n=14333
- E8NNB · n=10323
- B0MNS · n=26290
- E3YNB · n=13286
- E8KNB · n=11285
- V0HBC · n=32283
- V1NBC · n=12282
- R0KMB · n=46281
- P8NON · n=24265
- A8ANL · n=16258
- G4XQC · n=30258
- B0ENS · n=48250