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 Sep 2023: Puerto Varas 64.9 µg/m³, Osorno 63.6 µg/m³ and Coyhaique 53.0 µg/m³.
- 1Puerto VarasLos Lagos Region64.9
- 2OsornoLos Lagos Region63.6
- 3CoyhaiqueAysén53.0
- 4NacimientoBiobio51.3
- 5La UniónLos Ríos Region44.2
- 6Puerto MonttLos Lagos Region42.7
- 7San CarlosÑuble38.4
- 8CuranilahueBiobio37.0
- 9Puerto AysénAysén35.2
- 10ChillánÑuble34.6
- 11Los ÁngelesBiobio32.5
- 12SantiagoSantiago Metropolitan31.7
- 13RancaguaO'Higgins Region31.1
- 14TalcahuanoBiobio31.0
- 15TemucoAraucania30.3
- 16HualquiBiobio30.3
- 17Puente AltoSantiago Metropolitan30.2
- 18CuricóMaule Region29.8
- 19RengoO'Higgins Region29.5
- 20ValdiviaLos Ríos Region28.3
+ 23 more cities, 27.6 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.