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 to13 Jun 2025 That day's board

The worst cities in Chile for PM2.5 over the 30 days to 13 Jun 2025: Coyhaique 91.8 µg/m³, Osorno 87.4 µg/m³ and Nacimiento 84.0 µg/m³.

  1. 1CoyhaiqueAysén91.8
  2. 2OsornoLos Lagos Region87.4
  3. 3NacimientoBiobio84.0
  4. 4Puerto VarasLos Lagos Region79.7
  5. 5HualpénBiobio78.3
  6. 6VillarricaAraucania73.2
  7. 7TemucoAraucania71.1
  8. 8LinaresMaule Region71.0
  9. 9LajaBiobio70.1
  10. 10San CarlosÑuble66.3
  11. 11CuricóMaule Region62.8
  12. 12CuranilahueBiobio60.9
  13. 13Los ÁngelesBiobio58.3
  14. 14TalaganteSantiago Metropolitan57.6
  15. 15ChillánÑuble57.5
  16. 16TalcahuanoBiobio56.5
  17. 17SantiagoSantiago Metropolitan55.3
  18. 18HualquiBiobio55.2
  19. 19RengoO'Higgins Region53.7
  20. 20ValdiviaLos Ríos Region53.5

+ 27 more cities, 53.5 µg/m³ and below

Not counted on this day, too few days measured: Quillota since 25 May 2025.

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.