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 to27 Jun 2023 That day's board

The worst cities in Chile for PM2.5 over the 30 days to 27 Jun 2023: Coyhaique 97.0 µg/m³, Nacimiento 78.0 µg/m³ and Temuco 75.1 µg/m³.

  1. 1CoyhaiqueAysén97.0
  2. 2NacimientoBiobio78.0
  3. 3TemucoAraucania75.1
  4. 4HualpénBiobio67.8
  5. 5Puerto VarasLos Lagos Region67.1
  6. 6OsornoLos Lagos Region65.9
  7. 7San CarlosÑuble61.2
  8. 8LinaresMaule Region61.1
  9. 9ChillánÑuble60.3
  10. 10CuranilahueBiobio57.4
  11. 11CuricóMaule Region55.0
  12. 12RancaguaO'Higgins Region54.8
  13. 13LajaBiobio53.1
  14. 14RengoO'Higgins Region52.1
  15. 15SantiagoSantiago Metropolitan51.4
  16. 16Puerto MonttLos Lagos Region50.4
  17. 17TalaganteSantiago Metropolitan50.2
  18. 18La UniónLos Ríos Region50.0
  19. 19HualquiBiobio48.4
  20. 20Los ÁngelesBiobio46.4

+ 26 more cities, the next at 45.0 µg/m³

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 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.