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 15 Jun 2025: Coyhaique 93.2 µg/m³, Osorno 87.6 µg/m³ and Nacimiento 85.3 µg/m³.
- 1CoyhaiqueAysén93.2
- 2OsornoLos Lagos Region87.6
- 3NacimientoBiobio85.3
- 4Puerto VarasLos Lagos Region79.6
- 5HualpénBiobio78.4
- 6VillarricaAraucania70.6
- 7TemucoAraucania69.5
- 8LinaresMaule Region69.3
- 9LajaBiobio68.5
- 10San CarlosÑuble62.6
- 11CuricóMaule Region62.2
- 12CuranilahueBiobio60.0
- 13Los ÁngelesBiobio57.0
- 14TalaganteSantiago Metropolitan56.8
- 15HualquiBiobio54.6
- 16ChillánÑuble54.2
- 17TalcahuanoBiobio54.0
- 18Puerto MonttLos Lagos Region53.9
- 19ValdiviaLos Ríos Region53.6
- 20SantiagoSantiago Metropolitan53.6
+ 27 more cities, 52.8 µg/m³ and below
Not counted on this day, too few days measured: Quillota since 25 May 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 readers for them. Most cities there are missing from this board, not clean. Why.