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 12 Sep 2024: Fort McMurray 34.9 µg/m³, Flin Flon 34.7 µg/m³ and Edmonton 26.0 µg/m³.
- 1Fort McMurrayAlberta34.9
- 2Flin FlonManitoba34.7
- 3EdmontonAlberta26.0
- 4Fort SaskatchewanAlberta24.9
- 5Grande PrairieAlberta24.6
- 6Prince AlbertSaskatchewan24.2
- 7SaskatoonSaskatchewan21.6
- 8Grand CentreAlberta20.8
- 9EstevanSaskatchewan18.4
- 10ReginaSaskatchewan18.3
- 11Drayton ValleyAlberta18.0
- 12St. AlbertAlberta17.8
- 13Prince GeorgeBritish Columbia17.7
- 14Swift CurrentSaskatchewan17.1
- 15Sherwood ParkAlberta14.9
- 16QuesnelBritish Columbia14.8
- 17Red DeerAlberta14.4
- 18CalgaryAlberta13.6
- 19Medicine HatAlberta12.9
- 20NepeanOntario12.7
+ 98 more cities, 12.0 µg/m³ and below
Not counted on this day, too few days measured: Fort St. John since 6 Aug 2024.
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 readers for them. Most cities there are missing from this board, not clean. Why.