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 to21 Dec 2023 That day's board

The worst cities in Chile for PM2.5 over the 30 days to 21 Dec 2023: Puerto Varas 23.0 µg/m³, Tocopilla 21.5 µg/m³ and Puchuncaví 21.5 µg/m³.

  1. 1Puerto VarasLos Lagos Region23.0
  2. 2TocopillaAntofagasta21.5
  3. 3PuchuncavíValparaiso21.5
  4. 4QuinteroValparaiso20.6
  5. 5AricaArica y Parinacota Region20.2
  6. 6CoyhaiqueAysén20.0
  7. 7QuillotaValparaiso19.5
  8. 8Viña del MarValparaiso19.4
  9. 9HualpénBiobio19.3
  10. 10CoquimboCoquimbo Region19.1
  11. 11RancaguaO'Higgins Region19.0
  12. 12ConcónValparaiso18.7
  13. 13Puerto MonttLos Lagos Region18.6
  14. 14HuascoAtacama18.2
  15. 15RengoO'Higgins Region17.9
  16. 16CoronelBiobio17.9
  17. 17NacimientoBiobio17.8
  18. 18HualquiBiobio17.6
  19. 19AntofagastaAntofagasta17.6
  20. 20ToméBiobio17.4

+ 19 more cities, 17.4 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 4 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.