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 10 Aug 2026: Coyhaique 108.3 µg/m³, Osorno 59.5 µg/m³ and Puerto Varas 53.6 µg/m³.
- 1CoyhaiqueAysén108.3
- 2OsornoLos Lagos Region59.5
- 3Puerto VarasLos Lagos Region53.6
- 4Puerto AysénAysén47.3
- 5LajaBiobio47.2
- 6HualpénBiobio46.7
- 7CuranilahueBiobio46.3
- 8NacimientoBiobio46.1
- 9VillarricaAraucania41.2
- 10Puerto MonttLos Lagos Region41.2
- 11ValdiviaLos Ríos Region40.6
- 12La UniónLos Ríos Region37.7
- 13TemucoAraucania36.9
- 14CuricóMaule Region34.4
- 15ChillánÑuble32.9
- 16RengoO'Higgins Region32.4
- 17SantiagoSantiago Metropolitan31.9
- 18TalcahuanoBiobio31.4
- 19HualquiBiobio31.4
- 20LinaresMaule Region31.0
+ 26 more cities, 30.1 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.