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 to9 May 2026 That day's board

The worst cities in Canada for PM2.5 over the 30 days to 9 May 2026: Edmonton 7.3 µg/m³, Prince George 7.3 µg/m³ and Abbotsford 6.9 µg/m³.

  1. 1EdmontonAlberta7.3
  2. 2Prince GeorgeBritish Columbia7.3
  3. 3AbbotsfordBritish Columbia6.9
  4. 4AgassizBritish Columbia6.9
  5. 5VictoriaBritish Columbia6.9
  6. 6ChilliwackBritish Columbia6.8
  7. 7HarewoodBritish Columbia6.7
  8. 8CastlegarBritish Columbia6.5
  9. 9HamiltonOntario6.5
  10. 10LangleyBritish Columbia6.5
  11. 11Port AlberniBritish Columbia6.5
  12. 12Red DeerAlberta6.5
  13. 13QuesnelBritish Columbia6.4
  14. 14Sorel-TracyQuebec6.4
  15. 15SquamishBritish Columbia6.3
  16. 16DuncanBritish Columbia6.2
  17. 17VernonBritish Columbia6.2
  18. 18CalgaryAlberta6.1
  19. 19Port CoquitlamBritish Columbia6.1
  20. 20Strawberry HillBritish Columbia6.0

+ 97 more cities, 6.0 µg/m³ and below

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.