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 14 Aug 2025: Coyhaique 101.2 µg/m³, Nacimiento 73.5 µg/m³ and Osorno 66.9 µg/m³.
- 1CoyhaiqueAysén101.2
- 2NacimientoBiobio73.5
- 3OsornoLos Lagos Region66.9
- 4LinaresMaule Region64.5
- 5CuricóMaule Region60.6
- 6LajaBiobio58.6
- 7VillarricaAraucania58.0
- 8Puerto VarasLos Lagos Region56.9
- 9RengoO'Higgins Region53.4
- 10San CarlosÑuble53.1
- 11TalaganteSantiago Metropolitan51.8
- 12TemucoAraucania50.6
- 13HualpénBiobio50.4
- 14RancaguaO'Higgins Region49.8
- 15SantiagoSantiago Metropolitan49.2
- 16ChillánÑuble46.7
- 17Puerto MonttLos Lagos Region44.1
- 18Los ÁngelesBiobio44.1
- 19CuranilahueBiobio43.7
- 20TalcaMaule Region43.0
+ 27 more cities, 42.6 µg/m³ and below
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.