SmogRank / History / City race
Cities in Canada, worst air first, day by day
Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.
The worst cities in Canada for PM2.5 over the 30 days to 26 Aug 2023: Kamloops 53.4 µg/m³, Vernon 42.0 µg/m³ and Kelowna 39.5 µg/m³.
- 1KamloopsBritish Columbia53.4
- 2VernonBritish Columbia42.0
- 3KelownaBritish Columbia39.5
- 4PentictonBritish Columbia38.9
- 5CastlegarBritish Columbia30.0
- 6Fort McMurrayAlberta27.3
- 7CranbrookBritish Columbia23.6
- 8HopeBritish Columbia21.2
- 9Prince AlbertSaskatchewan21.2
- 10QuesnelBritish Columbia20.6
- 11CrestonBritish Columbia20.1
- 12EdmontonAlberta19.9
- 13ReginaSaskatchewan17.4
- 14Swift CurrentSaskatchewan16.7
- 15SaskatoonSaskatchewan16.5
- 16CalgaryAlberta16.3
- 17Grand CentreAlberta16.2
- 18EstevanSaskatchewan15.8
- 19Fort St. JohnBritish Columbia15.2
- 20Fort SaskatchewanAlberta14.7
+ 93 more cities, the next at 14.3 µg/m³
Not counted on this day, too few days measured: Flin Flon since 7 Aug 2023 and Bécancour since 15 Jul 2023.
Cities counted each day
A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.
Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites. We are building the reader for China's network. Turkey's network doesn't answer requests from outside the country, so we can't read it. Most cities there are missing from this board, not clean. Why.