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 24 Sep 2023: Puerto Varas 58.8 µg/m³, Osorno 58.7 µg/m³ and Coyhaique 53.9 µg/m³.
- 1Puerto VarasLos Lagos Region58.8
- 2OsornoLos Lagos Region58.7
- 3CoyhaiqueAysén53.9
- 4NacimientoBiobio48.4
- 5La UniónLos Ríos Region42.2
- 6Puerto MonttLos Lagos Region39.6
- 7San CarlosÑuble37.0
- 8CuranilahueBiobio35.9
- 9Puerto AysénAysén34.5
- 10ChillánÑuble33.1
- 11SantiagoSantiago Metropolitan32.2
- 12RancaguaO'Higgins Region31.9
- 13Puente AltoSantiago Metropolitan31.1
- 14Los ÁngelesBiobio30.8
- 15HualquiBiobio30.4
- 16RengoO'Higgins Region29.9
- 17TemucoAraucania29.5
- 18CuricóMaule Region29.3
- 19TalcahuanoBiobio28.9
- 20CauquenesMaule Region27.3
+ 23 more cities, 26.6 µg/m³ and below
Not counted on this day, too few days measured: Linares since 4 Sep 2023, Laja since 31 Jul 2023 and Hualpén since 30 Jul 2023.
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 readers for them. Most cities there are missing from this board, not clean. Why.