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 to13 Aug 2026 That day's board

The worst cities for PM2.5 over the 7 days to 13 Aug 2026: Coyhaique 125.4 µg/m³, Castlegar 94.8 µg/m³ and Kamloops 90.2 µg/m³.

  1. 1CoyhaiqueChile125.4
  2. 2CastlegarCanada94.8
  3. 3KamloopsCanada90.2
  4. 4Puerto VarasChile84.3
  5. 5HualpénChile81.7
  6. 6VernonCanada78.9
  7. 7OsornoChile75.8
  8. 8KampalaUganda75.6
  9. 9PrinevilleUnited States74.7
  10. 10Charkhi DādriIndia72.9
  11. 11GurugramIndia67.5
  12. 12LilongweMalawi67.3
  13. 13NacimientoChile66.5
  14. 14LajaChile64.0
  15. 15GujranwalaPakistan63.5
  16. 16LahorePakistan62.7
  17. 17CuranilahueChile62.1
  18. 18PāliIndia60.9
  19. 19GummidipundiIndia59.4
  20. 20PalembangIndonesia58.2

+ 3,086 more cities, the next at 58.0 µg/m³

Not counted on this day, too few days measured: Samāstipur since 13 Aug 2026, Saltillo since 11 Aug 2026, Chāpra since 5 Aug 2026 and 2 more cities.

30 days7 days
GoodModerateUnhealthy for sensitive 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 reader for China's network. Turkey's network doesn't answer requests from outside the country, so we can't read it. Most cities there are missing from this board, not clean. Why.