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 8 Oct 2026: Coyhaique 43.0 µg/m³, Puerto Varas 37.3 µg/m³ and Hualpén 36.6 µg/m³.
- 1CoyhaiqueAysén43.0
- 2Puerto VarasLos Lagos Region37.3
- 3HualpénBiobio36.6
- 4OsornoLos Lagos Region34.6
- 5VillarricaAraucania31.6
- 6ValdiviaLos Ríos Region30.6
- 7La UniónLos Ríos Region30.5
- 8CuranilahueBiobio30.4
- 9Puerto AysénAysén29.5
- 10NacimientoBiobio28.8
- 11Puerto MonttLos Lagos Region28.4
- 12ChillánÑuble26.2
- 13Puente AltoSantiago Metropolitan25.8
- 14San CarlosÑuble25.5
- 15SantiagoSantiago Metropolitan25.2
- 16RancaguaO'Higgins Region25.1
- 17HualquiBiobio24.6
- 18TemucoAraucania24.2
- 19LinaresMaule Region24.2
- 20CuricóMaule Region23.0
+ 26 more cities, 22.6 µg/m³ and below
Not counted on this day, too few days measured: Laja since 8 Oct 2026 and Quilpué since 21 Sep 2026.
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.