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 25 Sep 2023: Coyhaique 55.0 µg/m³, Puerto Varas 54.5 µg/m³ and Osorno 53.0 µg/m³.
- 1CoyhaiqueAysén55.0
- 2Puerto VarasLos Lagos Region54.5
- 3OsornoLos Lagos Region53.0
- 4NacimientoBiobio46.0
- 5La UniónLos Ríos Region40.5
- 6Puerto MonttLos Lagos Region39.3
- 7San CarlosÑuble36.1
- 8CuranilahueBiobio34.8
- 9Puerto AysénAysén33.1
- 10SantiagoSantiago Metropolitan32.0
- 11ChillánÑuble32.0
- 12RancaguaO'Higgins Region31.7
- 13Puente AltoSantiago Metropolitan31.2
- 14HualquiBiobio30.1
- 15RengoO'Higgins Region29.6
- 16CuricóMaule Region29.3
- 17Los ÁngelesBiobio28.9
- 18TalcahuanoBiobio28.0
- 19TemucoAraucania27.9
- 20CauquenesMaule Region26.9
+ 23 more cities, the next at 26.3 µg/m³
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 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.