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 12 May 2026: Osorno 56.4 µg/m³, Coyhaique 53.0 µg/m³ and Puerto Varas 50.9 µg/m³.
- 1OsornoLos Lagos Region56.4
- 2CoyhaiqueAysén53.0
- 3Puerto VarasLos Lagos Region50.9
- 4NacimientoBiobio49.4
- 5LajaBiobio47.7
- 6CuranilahueBiobio46.3
- 7HualquiBiobio44.6
- 8HualpénBiobio41.5
- 9Puerto MonttLos Lagos Region41.0
- 10VillarricaAraucania40.6
- 11La UniónLos Ríos Region39.3
- 12TemucoAraucania39.2
- 13ValdiviaLos Ríos Region39.0
- 14LinaresMaule Region38.0
- 15San CarlosÑuble37.6
- 16ChillánÑuble36.2
- 17CuricóMaule Region35.8
- 18CoronelBiobio35.6
- 19Puerto AysénAysén33.7
- 20Los ÁngelesBiobio33.6
+ 27 more cities, 32.4 µg/m³ and below
Not counted on this day, too few days measured: Copiapó since 29 Apr 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.