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 to25 May 2023 That day's board

The worst cities in Chile for PM2.5 over the 30 days to 25 May 2023: Osorno 57.3 µg/m³, Linares 55.8 µg/m³ and Nacimiento 55.7 µg/m³.

  1. 1OsornoLos Lagos Region57.3
  2. 2LinaresMaule Region55.8
  3. 3NacimientoBiobio55.7
  4. 4CoyhaiqueAysén52.8
  5. 5Puerto VarasLos Lagos Region47.8
  6. 6CuricóMaule Region47.5
  7. 7SantiagoSantiago Metropolitan47.2
  8. 8RancaguaO'Higgins Region47.0
  9. 9LajaBiobio45.9
  10. 10San CarlosÑuble45.3
  11. 11TalaganteSantiago Metropolitan43.5
  12. 12HualquiBiobio43.2
  13. 13ChillánÑuble41.5
  14. 14CoronelBiobio40.7
  15. 15Puente AltoSantiago Metropolitan39.1
  16. 16TalcaMaule Region38.1
  17. 17CuranilahueBiobio38.1
  18. 18La UniónLos Ríos Region37.7
  19. 19QuillotaValparaiso36.5
  20. 20Puerto AysénAysén36.4

+ 23 more cities, 34.4 µg/m³ and below

Not counted on this day, too few days measured: Hualpén since 20 May 2023 and Rengo since 9 May 2023.

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.