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.

CountriesCities
The 30 days to6 Oct 2026 That day's board

The worst cities in Canada for PM2.5 over the 30 days to 6 Oct 2026: Castlegar 7.9 µg/m³, Edmonton 7.9 µg/m³ and Kamloops 7.8 µg/m³.

  1. 1CastlegarBritish Columbia7.9
  2. 2EdmontonAlberta7.9
  3. 3KamloopsBritish Columbia7.8
  4. 4ChilliwackBritish Columbia7.6
  5. 5HopeBritish Columbia7.5
  6. 6AgassizBritish Columbia7.3
  7. 7CalgaryAlberta7.2
  8. 8QuesnelBritish Columbia7.2
  9. 9VernonBritish Columbia7.2
  10. 10Red DeerAlberta7.1
  11. 11AbbotsfordBritish Columbia6.9
  12. 12Prince GeorgeBritish Columbia6.8
  13. 13Fort SaskatchewanAlberta6.5
  14. 14Drayton ValleyAlberta6.4
  15. 15HarewoodBritish Columbia6.4
  16. 16KelownaBritish Columbia6.3
  17. 17SquamishBritish Columbia6.3
  18. 18Sorel-TracyQuebec6.2
  19. 19DuncanBritish Columbia6.1
  20. 20VancouverBritish Columbia6.1

+ 98 more cities, 6.1 µg/m³ and below

Not counted on this day, too few days measured: Prince Albert since 25 Sep 2026.

30 days7 days
GoodModerateSensitive groupsUnhealthyVery unhealthyHazardousWHO 24-hour guideline, 15 µg/m³Fades where it stood: not counted that 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.