SmogRank / History / City race

Cities in Chile, 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 to24 Jun 2023 That day's board

The worst cities in Chile for PM2.5 over the 30 days to 24 Jun 2023: Coyhaique 89.6 µg/m³, Nacimiento 80.8 µg/m³ and Temuco 77.0 µg/m³.

  1. 1CoyhaiqueAysén89.6
  2. 2NacimientoBiobio80.8
  3. 3TemucoAraucania77.0
  4. 4Puerto VarasLos Lagos Region74.2
  5. 5OsornoLos Lagos Region73.6
  6. 6HualpénBiobio72.1
  7. 7San CarlosÑuble66.6
  8. 8LinaresMaule Region64.0
  9. 9ChillánÑuble63.5
  10. 10CuricóMaule Region58.9
  11. 11CuranilahueBiobio58.4
  12. 12RancaguaO'Higgins Region56.8
  13. 13LajaBiobio56.5
  14. 14Puerto MonttLos Lagos Region56.4
  15. 15SantiagoSantiago Metropolitan53.2
  16. 16RengoO'Higgins Region53.0
  17. 17TalaganteSantiago Metropolitan52.5
  18. 18La UniónLos Ríos Region51.7
  19. 19HualquiBiobio49.8
  20. 20Los ÁngelesBiobio47.8

+ 26 more cities, 46.6 µg/m³ and below

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.