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 Aug 2023 That day's board

The worst cities in Chile for PM2.5 over the 30 days to 25 Aug 2023: Nacimiento 74.0 µg/m³, Coyhaique 72.4 µg/m³ and Osorno 62.8 µg/m³.

  1. 1NacimientoBiobio74.0
  2. 2CoyhaiqueAysén72.4
  3. 3OsornoLos Lagos Region62.8
  4. 4Puerto VarasLos Lagos Region57.0
  5. 5San CarlosÑuble51.8
  6. 6LinaresMaule Region49.7
  7. 7TemucoAraucania47.2
  8. 8ChillánÑuble46.3
  9. 9La UniónLos Ríos Region46.0
  10. 10Los ÁngelesBiobio45.7
  11. 11CoronelBiobio45.5
  12. 12CuricóMaule Region44.5
  13. 13CuranilahueBiobio44.5
  14. 14Puerto MonttLos Lagos Region43.5
  15. 15HualquiBiobio41.8
  16. 16ValdiviaLos Ríos Region40.6
  17. 17RancaguaO'Higgins Region40.2
  18. 18SantiagoSantiago Metropolitan40.1
  19. 19RengoO'Higgins Region39.6
  20. 20Puerto AysénAysén38.5

+ 24 more cities, 36.9 µg/m³ and below

Not counted on this day, too few days measured: Laja since 31 Jul 2023 and Hualpén since 30 Jul 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.