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.
The worst cities in Chile for PM2.5 over the 30 days to 22 Feb 2024: Viña del Mar 26.6 µg/m³, Santiago 24.8 µg/m³ and Hualpén 24.2 µg/m³.
- 1Viña del MarValparaiso26.6
- 2SantiagoSantiago Metropolitan24.8
- 3HualpénBiobio24.2
- 4PuchuncavíValparaiso24.0
- 5Puente AltoSantiago Metropolitan23.8
- 6TalaganteSantiago Metropolitan22.4
- 7QuinteroValparaiso22.1
- 8Puerto VarasLos Lagos Region21.3
- 9NacimientoBiobio20.9
- 10RancaguaO'Higgins Region20.7
- 11San CarlosÑuble20.6
- 12TocopillaAntofagasta20.2
- 13Puerto MonttLos Lagos Region20.0
- 14HualquiBiobio20.0
- 15CoronelBiobio20.0
- 16San Pedro de la PazBiobio19.9
- 17ToméBiobio19.8
- 18RengoO'Higgins Region19.8
- 19TalcahuanoBiobio19.7
- 20ChillánÑuble19.6
+ 25 more cities, the next at 19.5 µg/m³
Days missing from the source archive fall in this window, so fewer countries are counted.
Cities counted each 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 reader for China's network. Turkey's network doesn't answer requests from outside the country, so we can't read it. Most cities there are missing from this board, not clean. Why.