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 Oct 2023: Puerto Varas 36.5 µg/m³, Coyhaique 31.8 µg/m³ and Osorno 30.7 µg/m³.
- 1Puerto VarasLos Lagos Region36.5
- 2CoyhaiqueAysén31.8
- 3OsornoLos Lagos Region30.7
- 4NacimientoBiobio30.3
- 5TemucoAraucania29.4
- 6La UniónLos Ríos Region29.0
- 7SantiagoSantiago Metropolitan27.3
- 8Puente AltoSantiago Metropolitan26.2
- 9Puerto MonttLos Lagos Region26.0
- 10HualquiBiobio25.0
- 11RancaguaO'Higgins Region23.9
- 12CoronelBiobio23.9
- 13ValdiviaLos Ríos Region23.4
- 14QuillotaValparaiso23.4
- 15San CarlosÑuble22.3
- 16TalaganteSantiago Metropolitan22.2
- 17CuricóMaule Region22.2
- 18PuchuncavíValparaiso22.0
- 19CuranilahueBiobio21.9
- 20AntofagastaAntofagasta21.6
+ 24 more cities, 21.2 µg/m³ and below
Not counted on this day, too few days measured: Linares since 4 Sep 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.