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 to15 Feb 2025 That day's board

The worst cities for PM2.5 over the 30 days to 15 Feb 2025: Dhaka 202.3 µg/m³, Lahore 179.3 µg/m³ and Kolkata 138.9 µg/m³.

  1. 1DhakaBangladesh202.3
  2. 2LahorePakistan179.3
  3. 3KolkataIndia138.9
  4. 4DelhiIndia126.7
  5. 5KampalaUganda117.2
  6. 6N'DjamenaChad109.8
  7. 7DushanbeTajikistan92.4
  8. 8MumbaiIndia90.9
  9. 9KathmanduNepal89.2
  10. 10PeshawarPakistan87.4
  11. 11Ulan BatorMongolia85.1
  12. 12IslamabadPakistan77.3
  13. 13KarachiPakistan76.4
  14. 14SarajevoBosnia and Herzegovina75.8
  15. 15Banja LukaBosnia and Herzegovina75.1
  16. 16AbujaNigeria72.9
  17. 17HyderabadIndia71.2
  18. 18BishkekKyrgyzstan67.9
  19. 19YangonMyanmar67.2
  20. 20AlmatyKazakhstan67.1

+ 2,630 more cities, 62.7 µg/m³ and below

Not counted on this day, too few days measured: Dhahran since 22 Jan 2025, Negotin since 19 Jan 2025, Zagreb since 19 Jan 2025 and 12 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.