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 to19 Feb 2025 That day's board

The worst cities for PM2.5 over the 7 days to 19 Feb 2025: Dhaka 151.7 µg/m³, Lahore 146.3 µg/m³ and N'Djamena 119.0 µg/m³.

  1. 1DhakaBangladesh151.7
  2. 2LahorePakistan146.3
  3. 3N'DjamenaChad119.0
  4. 4KathmanduNepal101.4
  5. 5KampalaUganda99.1
  6. 6DelhiIndia86.2
  7. 7KrotoszynPoland85.5
  8. 8Banja LukaBosnia and Herzegovina82.9
  9. 9KolkataIndia78.8
  10. 10MumbaiIndia77.7
  11. 11AlmatyKazakhstan77.1
  12. 12PhraeThailand76.8
  13. 13PeshawarPakistan76.6
  14. 14Ulan BatorMongolia71.6
  15. 15HyderabadIndia70.9
  16. 16ZaječarSerbia69.2
  17. 17Şabāḩ as SālimKuwait69.0
  18. 18NanThailand65.4
  19. 19ValjevoSerbia63.7
  20. 20LeskovacSerbia63.4

+ 2,883 more cities, the next at 63.4 µg/m³

Not counted on this day, too few days measured: Kinshasa since 19 Feb 2025 and Racibórz since 14 Feb 2025.

30 days7 days
GoodModerateUnhealthy for sensitive 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, Turkey and Iran, which publish only on their own websites. We are building the reader for China's network. The networks of Turkey and Iran don't answer requests from outside their countries, so we can't read them. Most cities there are missing from this board, not clean. Why.