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 30 days to2 Aug 2026 That day's board

The worst cities for PM2.5 over the 30 days to 2 Aug 2026: Coyhaique 124.1 µg/m³, Gurugram 91.8 µg/m³ and Osorno 90.8 µg/m³.

  1. 1CoyhaiqueChile124.1
  2. 2GurugramIndia91.8
  3. 3OsornoChile90.8
  4. 4KinshasaDemocratic Republic of the Congo90.1
  5. 5RoparIndia82.5
  6. 6NohanIndia82.5
  7. 7Puerto VarasChile81.0
  8. 8KampalaUganda73.5
  9. 9Charkhi DādriIndia64.8
  10. 10NarnaulIndia62.6
  11. 11BahadurgarhIndia62.3
  12. 12LilongweMalawi60.4
  13. 13CuranilahueChile60.3
  14. 14KarnālIndia59.4
  15. 15BawānaIndia57.8
  16. 16MānesarIndia57.7
  17. 17FatehābādIndia57.6
  18. 18GummidipundiIndia57.3
  19. 19JīndIndia56.9
  20. 20RājgīrIndia56.1

+ 2,896 more cities, 55.4 µg/m³ and below

Not counted on this day, too few days measured: Panipat since 20 Jul 2026, Santa María since 17 Jul 2026, Sonīpat since 5 Jul 2026 and Loni since 30 Jun 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.