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 to10 Jul 2026 That day's board

The worst cities for PM2.5 over the 30 days to 10 Jul 2026: Coyhaique 119.4 µg/m³, Gurugram 108.0 µg/m³ and Osorno 92.3 µg/m³.

  1. 1CoyhaiqueChile119.4
  2. 2GurugramIndia108.0
  3. 3OsornoChile92.3
  4. 4Puerto VarasChile85.4
  5. 5KinshasaDemocratic Republic of the Congo84.9
  6. 6CuranilahueChile78.2
  7. 7HualpénChile77.6
  8. 8NacimientoChile77.5
  9. 9LinaresChile75.0
  10. 10KarnālIndia73.6
  11. 11LajaChile72.3
  12. 12BahadurgarhIndia71.6
  13. 13CuricóChile69.9
  14. 14BhiwāniIndia67.8
  15. 15MānesarIndia66.9
  16. 16Charkhi DādriIndia66.2
  17. 17San CarlosChile66.2
  18. 18LilongweMalawi64.7
  19. 19La UniónChile63.7
  20. 20VillarricaChile63.5

+ 2,782 more cities, 63.4 µg/m³ and below

Not counted on this day, too few days measured: Panipat since 10 Jul 2026, Sonīpat since 5 Jul 2026, Loni since 30 Jun 2026 and 3 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.