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 17 Apr 2025: Coyhaique 54.8 µg/m³, Nacimiento 35.8 µg/m³ and Villarrica 34.1 µg/m³.
- 1CoyhaiqueAysén54.8
- 2NacimientoBiobio35.8
- 3VillarricaAraucania34.1
- 4HualpénBiobio29.3
- 5HualquiBiobio28.5
- 6TocopillaAntofagasta28.2
- 7Puente AltoSantiago Metropolitan27.9
- 8SantiagoSantiago Metropolitan27.6
- 9Puerto VarasLos Lagos Region27.4
- 10OsornoLos Lagos Region27.4
- 11La UniónLos Ríos Region27.4
- 12ConcónValparaiso26.5
- 13ChillánÑuble26.3
- 14ChiguayanteBiobio26.1
- 15CoronelBiobio25.6
- 16San CarlosÑuble25.4
- 17Puerto AysénAysén25.4
- 18Los ÁngelesBiobio25.2
- 19TemucoAraucania25.1
- 20TalcaMaule Region25.0
+ 26 more cities, the next at 24.8 µg/m³
Not counted on this day, too few days measured: Linares since 3 Apr 2025 and Curanilahue since 30 Mar 2025.
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.