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 to27 Apr 2023 That day's board

The worst cities in Chile for PM2.5 over the 30 days to 27 Apr 2023: Coyhaique 53.5 µg/m³, Osorno 42.0 µg/m³ and Puerto Varas 41.3 µg/m³.

  1. 1CoyhaiqueAysén53.5
  2. 2OsornoLos Lagos Region42.0
  3. 3Puerto VarasLos Lagos Region41.3
  4. 4San CarlosÑuble35.9
  5. 5NacimientoBiobio34.6
  6. 6LinaresMaule Region34.5
  7. 7ChillánÑuble33.8
  8. 8Puerto MonttLos Lagos Region32.9
  9. 9Puerto AysénAysén31.1
  10. 10CuricóMaule Region30.6
  11. 11RancaguaO'Higgins Region30.3
  12. 12CuranilahueBiobio29.6
  13. 13ValdiviaLos Ríos Region29.5
  14. 14SantiagoSantiago Metropolitan29.3
  15. 15La UniónLos Ríos Region29.2
  16. 16HualpénBiobio29.2
  17. 17LajaBiobio29.0
  18. 18TalaganteSantiago Metropolitan27.7
  19. 19HualquiBiobio27.6
  20. 20TalcaMaule Region27.3

+ 25 more cities, 27.0 µg/m³ and below

Days missing from the source archive fall in this window, so fewer countries are counted.

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.