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 to26 Jun 2023 That day's board

The worst cities in Chile for PM2.5 over the 30 days to 26 Jun 2023: Coyhaique 93.8 µg/m³, Nacimiento 80.8 µg/m³ and Temuco 76.8 µg/m³.

  1. 1CoyhaiqueAysén93.8
  2. 2NacimientoBiobio80.8
  3. 3TemucoAraucania76.8
  4. 4HualpénBiobio70.1
  5. 5Puerto VarasLos Lagos Region68.2
  6. 6OsornoLos Lagos Region67.9
  7. 7San CarlosÑuble65.0
  8. 8LinaresMaule Region63.0
  9. 9ChillánÑuble62.9
  10. 10CuranilahueBiobio58.1
  11. 11CuricóMaule Region57.3
  12. 12RancaguaO'Higgins Region56.0
  13. 13LajaBiobio55.2
  14. 14RengoO'Higgins Region52.8
  15. 15SantiagoSantiago Metropolitan52.7
  16. 16TalaganteSantiago Metropolitan51.4
  17. 17Puerto MonttLos Lagos Region50.9
  18. 18La UniónLos Ríos Region50.1
  19. 19HualquiBiobio49.3
  20. 20Los ÁngelesBiobio47.6

+ 26 more cities, 46.0 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.