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 to16 Jul 2026 That day's board

The worst cities for PM2.5 over the 7 days to 16 Jul 2026: Gurugram 137.7 µg/m³, Superior 133.9 µg/m³ and Coyhaique 133.7 µg/m³.

  1. 1GurugramIndia137.7
  2. 2SuperiorUnited States133.9
  3. 3CoyhaiqueChile133.7
  4. 4DuluthUnited States112.3
  5. 5MarquetteUnited States110.4
  6. 6KinshasaDemocratic Republic of the Congo97.1
  7. 7Charkhi DādriIndia96.9
  8. 8JīndIndia92.7
  9. 9MānesarIndia88.4
  10. 10BhiwāniIndia86.8
  11. 11BahadurgarhIndia83.8
  12. 12CloquetUnited States80.9
  13. 13Sault Ste. MarieCanada80.8
  14. 14SonīpatIndia79.8
  15. 15FatehābādIndia77.5
  16. 16FaridabadIndia76.2
  17. 17NeelankaraiIndia72.0
  18. 18VirginiaUnited States71.8
  19. 19AlwarIndia71.4
  20. 20LilongweMalawi71.2

+ 2,933 more cities, 71.1 µg/m³ and below

Not counted on this day, too few days measured: Kaithal since 16 Jul 2026, Santa María since 10 Jul 2026 and Loni since 24 Jun 2026.

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.