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 to16 May 2025 That day's board

The worst cities in Chile for PM2.5 over the 30 days to 16 May 2025: Nacimiento 58.5 µg/m³, Villarrica 57.4 µg/m³ and Linares 56.7 µg/m³.

  1. 1NacimientoBiobio58.5
  2. 2VillarricaAraucania57.4
  3. 3LinaresMaule Region56.7
  4. 4CoyhaiqueAysén53.2
  5. 5San CarlosÑuble51.3
  6. 6HualpénBiobio50.8
  7. 7LajaBiobio46.7
  8. 8ChillánÑuble45.7
  9. 9OsornoLos Lagos Region41.7
  10. 10CuranilahueBiobio41.7
  11. 11CuricóMaule Region40.9
  12. 12SantiagoSantiago Metropolitan40.4
  13. 13Puente AltoSantiago Metropolitan40.1
  14. 14Los ÁngelesBiobio40.1
  15. 15TalcaMaule Region39.5
  16. 16Puerto VarasLos Lagos Region39.5
  17. 17TalcahuanoBiobio38.4
  18. 18CoronelBiobio37.4
  19. 19TemucoAraucania37.1
  20. 20TalaganteSantiago Metropolitan36.0

+ 27 more cities, 35.4 µg/m³ and below

Not counted on this day, too few days measured: Hualqui since 27 Apr 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.