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 to21 Jun 2025 That day's board

The worst cities for PM2.5 over the 7 days to 21 Jun 2025: Būndi 101.4 µg/m³, Khurja 99.5 µg/m³ and Karauli 84.6 µg/m³.

  1. 1BūndiIndia101.4
  2. 2KhurjaIndia99.5
  3. 3KarauliIndia84.6
  4. 4KigaliRwanda79.0
  5. 5NacimientoChile76.3
  6. 6HualpénChile68.2
  7. 7CuddaloreIndia66.5
  8. 8VillarricaChile66.0
  9. 9CuricóChile62.7
  10. 10Santa MaríaPeru60.5
  11. 11TonkIndia59.4
  12. 12DispurIndia58.7
  13. 13OsornoChile58.7
  14. 14CuranilahueChile57.1
  15. 15Puerto VarasChile56.9
  16. 16LinaresChile55.9
  17. 17RamanathapuramIndia55.8
  18. 18Santa Anita - Los FicusPeru55.8
  19. 19PeshawarPakistan55.7
  20. 20LoniIndia55.7

+ 2,392 more cities, 54.9 µg/m³ and below

Not counted on this day, too few days measured: Pāli since 21 Jun 2025, Singrauli since 16 Jun 2025, Rājgīr since 20 May 2025 and Ooty since 29 Apr 2025.

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.