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 Jul 2023 That day's board

The worst cities in Chile for PM2.5 over the 30 days to 24 Jul 2023: Coyhaique 109.6 µg/m³, Nacimiento 78.7 µg/m³ and Osorno 77.2 µg/m³.

  1. 1CoyhaiqueAysén109.6
  2. 2NacimientoBiobio78.7
  3. 3OsornoLos Lagos Region77.2
  4. 4HualpénBiobio77.2
  5. 5Puerto VarasLos Lagos Region70.5
  6. 6LajaBiobio66.2
  7. 7CuranilahueBiobio55.4
  8. 8RancaguaO'Higgins Region54.0
  9. 9Puerto MonttLos Lagos Region52.5
  10. 10TalcahuanoBiobio51.9
  11. 11TemucoAraucania51.5
  12. 12RengoO'Higgins Region51.1
  13. 13LinaresMaule Region51.0
  14. 14Puerto AysénAysén50.8
  15. 15SantiagoSantiago Metropolitan49.9
  16. 16TalaganteSantiago Metropolitan49.3
  17. 17San CarlosÑuble48.8
  18. 18La UniónLos Ríos Region48.7
  19. 19ChillánÑuble48.7
  20. 20Los ÁngelesBiobio47.5

+ 26 more cities, 47.2 µg/m³ and below

Days missing from the source archive fall in this window, so fewer countries are counted.

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.