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 to9 May 2026 That day's board

The worst cities in Chile for PM2.5 over the 30 days to 9 May 2026: Osorno 51.4 µg/m³, Coyhaique 50.9 µg/m³ and Nacimiento 48.3 µg/m³.

  1. 1OsornoLos Lagos Region51.4
  2. 2CoyhaiqueAysén50.9
  3. 3NacimientoBiobio48.3
  4. 4Puerto VarasLos Lagos Region47.2
  5. 5LajaBiobio45.3
  6. 6CuranilahueBiobio43.0
  7. 7VillarricaAraucania42.3
  8. 8HualpénBiobio42.3
  9. 9HualquiBiobio41.0
  10. 10Puerto MonttLos Lagos Region39.0
  11. 11ValdiviaLos Ríos Region38.9
  12. 12TemucoAraucania36.9
  13. 13ChillánÑuble35.3
  14. 14La UniónLos Ríos Region35.2
  15. 15CuricóMaule Region35.2
  16. 16Los ÁngelesBiobio34.9
  17. 17San CarlosÑuble34.8
  18. 18LinaresMaule Region34.5
  19. 19Puerto AysénAysén32.6
  20. 20CoronelBiobio32.6

+ 27 more cities, 30.7 µg/m³ and below

Not counted on this day, too few days measured: Copiapó since 29 Apr 2026.

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.