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 to10 Mar 2025 That day's board

The worst cities for PM2.5 over the 7 days to 10 Mar 2025: Loni 165.2 µg/m³, Dhaka 133.0 µg/m³ and Kampala 126.0 µg/m³.

  1. 1LoniIndia165.2
  2. 2DhakaBangladesh133.0
  3. 3KampalaUganda126.0
  4. 4HājīpurIndia112.8
  5. 5AngulIndia105.5
  6. 6BawānaIndia103.3
  7. 7Dera MāndiIndia99.5
  8. 8NegotinSerbia98.5
  9. 9N'DjamenaChad98.4
  10. 10ZaječarSerbia94.6
  11. 11BhiwadiIndia94.4
  12. 12TumkūrIndia94.2
  13. 13HāpurIndia88.4
  14. 14SasarāmIndia87.0
  15. 15Kahi KuchiIndia86.9
  16. 16GhāziābādIndia86.6
  17. 17GuwahatiIndia84.0
  18. 18ŠabacSerbia83.6
  19. 19KathmanduNepal83.5
  20. 20Charkhi DādriIndia82.9

+ 2,955 more cities, 82.2 µg/m³ and below

Not counted on this day, too few days measured: El Paso since 10 Mar 2025, Koppal since 9 Mar 2025, Beijing since 7 Mar 2025 and 5 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.