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 to11 Dec 2025 That day's board

The worst cities for PM2.5 over the 30 days to 11 Dec 2025: Loni 292.2 µg/m³, Bawāna 272.6 µg/m³ and Multan 265.7 µg/m³.

  1. 1LoniIndia292.2
  2. 2BawānaIndia272.6
  3. 3MultanPakistan265.7
  4. 4GujranwalaPakistan262.8
  5. 5FaisalabadPakistan259.3
  6. 6PeshawarPakistan242.4
  7. 7DādriIndia236.2
  8. 8NarelaIndia236.1
  9. 9LahorePakistan233.4
  10. 10NoidaIndia225.6
  11. 11SialkotPakistan222.0
  12. 12GhāziābādIndia208.6
  13. 13HāpurIndia205.6
  14. 14DelhiIndia204.5
  15. 15BahawalpurPakistan192.8
  16. 16SonīpatIndia178.5
  17. 17BahadurgarhIndia173.7
  18. 18RawalpindiPakistan171.8
  19. 19Greater NoidaIndia171.4
  20. 20MeerutIndia168.3

+ 2,942 more cities, 165.6 µg/m³ and below

Not counted on this day, too few days measured: Siddharthanagar since 5 Dec 2025, Rohtak since 29 Nov 2025, Panipat since 27 Nov 2025 and Nagapattinam since 11 Nov 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.