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 to23 Nov 2023 That day's board

The worst cities in Chile for PM2.5 over the 30 days to 23 Nov 2023: Puerto Varas 30.9 µg/m³, Puerto Montt 26.8 µg/m³ and Hualpén 26.0 µg/m³.

  1. 1Puerto VarasLos Lagos Region30.9
  2. 2Puerto MonttLos Lagos Region26.8
  3. 3HualpénBiobio26.0
  4. 4CoyhaiqueAysén25.3
  5. 5La UniónLos Ríos Region23.9
  6. 6TocopillaAntofagasta23.1
  7. 7NacimientoBiobio22.9
  8. 8Puerto AysénAysén21.6
  9. 9TemucoAraucania20.7
  10. 10PuchuncavíValparaiso20.6
  11. 11CoronelBiobio20.5
  12. 12QuinteroValparaiso20.3
  13. 13QuillotaValparaiso19.9
  14. 14CoquimboCoquimbo Region19.7
  15. 15AntofagastaAntofagasta19.0
  16. 16HuascoAtacama18.9
  17. 17ValdiviaLos Ríos Region18.8
  18. 18TalcahuanoBiobio18.3
  19. 19LajaBiobio18.3
  20. 20San CarlosÑuble18.2

+ 11 more cities, 17.7 µg/m³ and below

Not counted on this day, too few days measured: Lota since 2 Nov 2023, Talagante since 1 Nov 2023, Santiago since 1 Nov 2023 and 11 more cities.

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.