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 to3 Jul 2026 That day's board

The worst cities for PM2.5 over the 30 days to 3 Jul 2026: Coyhaique 112.9 µg/m³, Gurugram 107.1 µg/m³ and Panipat 102.3 µg/m³.

  1. 1CoyhaiqueChile112.9
  2. 2GurugramIndia107.1
  3. 3PanipatIndia102.3
  4. 4KinshasaDemocratic Republic of the Congo82.6
  5. 5HualpénChile77.6
  6. 6OsornoChile77.1
  7. 7KarnālIndia77.0
  8. 8JīndIndia76.9
  9. 9SonīpatIndia75.8
  10. 10Charkhi DādriIndia75.0
  11. 11NacimientoChile74.6
  12. 12BahadurgarhIndia73.5
  13. 13BhiwāniIndia72.9
  14. 14Puerto VarasChile72.8
  15. 15RoparIndia72.3
  16. 16NohanIndia72.3
  17. 17LajaChile71.3
  18. 18CuranilahueChile68.5
  19. 19FaridabadIndia67.2
  20. 20MānesarIndia66.6

+ 2,573 more cities, 62.7 µg/m³ and below

Not counted on this day, too few days measured: Loni since 30 Jun 2026, Hāpur since 26 Jun 2026, Joda since 16 Jun 2026 and 2 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.