SmogRank / History / City race

Cities, 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 7 days to8 Aug 2026 That day's board

The worst cities for PM2.5 over the 7 days to 8 Aug 2026: Prineville 99.6 µg/m³, Wenatchee 98.2 µg/m³ and Coyhaique 98.0 µg/m³.

  1. 1PrinevilleUnited States99.6
  2. 2WenatcheeUnited States98.2
  3. 3CoyhaiqueChile98.0
  4. 4KamloopsCanada87.6
  5. 5KinshasaDemocratic Republic of the Congo75.5
  6. 6QuincyUnited States73.2
  7. 7LilongweMalawi64.2
  8. 8KampalaUganda64.1
  9. 9EphrataUnited States63.4
  10. 10Airway HeightsUnited States62.7
  11. 11MeadUnited States62.3
  12. 12WeiserUnited States61.2
  13. 13Spokane ValleyUnited States61.0
  14. 14FairwoodUnited States60.9
  15. 15SpokaneUnited States59.8
  16. 16CheneyUnited States59.0
  17. 17VernonCanada58.8
  18. 18GurugramIndia58.5
  19. 19GobindgarhIndia57.8
  20. 20Moses LakeUnited States57.5

+ 3,013 more cities, 57.4 µg/m³ and below

Not counted on this day, too few days measured: Pāli since 6 Aug 2026, Chāpra since 5 Aug 2026, Ropar since 1 Aug 2026 and 4 more cities.

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.