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 Oct 2023 That day's board

The worst cities in Chile for PM2.5 over the 30 days to 24 Oct 2023: Puerto Varas 34.9 µg/m³, Coyhaique 30.5 µg/m³ and Temuco 29.9 µg/m³.

  1. 1Puerto VarasLos Lagos Region34.9
  2. 2CoyhaiqueAysén30.5
  3. 3TemucoAraucania29.9
  4. 4NacimientoBiobio29.7
  5. 5OsornoLos Lagos Region28.6
  6. 6La UniónLos Ríos Region27.6
  7. 7SantiagoSantiago Metropolitan26.9
  8. 8Puente AltoSantiago Metropolitan25.4
  9. 9Puerto MonttLos Lagos Region25.3
  10. 10HualquiBiobio24.3
  11. 11CoronelBiobio23.9
  12. 12ValdiviaLos Ríos Region23.3
  13. 13QuillotaValparaiso23.3
  14. 14RancaguaO'Higgins Region23.2
  15. 15San CarlosÑuble22.4
  16. 16TalaganteSantiago Metropolitan22.2
  17. 17CuricóMaule Region22.2
  18. 18CuranilahueBiobio22.2
  19. 19PuchuncavíValparaiso22.1
  20. 20AntofagastaAntofagasta21.8

+ 24 more cities, 21.4 µg/m³ and below

Not counted on this day, too few days measured: Linares since 4 Sep 2023.

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.