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 22 May 2024: Coyhaique 102.7 µg/m³, Nacimiento 87.8 µg/m³ and Osorno 75.5 µg/m³.
- 1CoyhaiqueAysén102.7
- 2NacimientoBiobio87.8
- 3OsornoLos Lagos Region75.5
- 4HualpénBiobio74.8
- 5Puerto VarasLos Lagos Region67.2
- 6San CarlosÑuble61.2
- 7CuranilahueBiobio60.9
- 8VillarricaAraucania58.6
- 9ChillánÑuble58.1
- 10LajaBiobio55.4
- 11La UniónLos Ríos Region54.2
- 12CoronelBiobio52.3
- 13TemucoAraucania51.7
- 14TalcahuanoBiobio51.2
- 15Puerto AysénAysén51.0
- 16Los ÁngelesBiobio50.9
- 17Puerto MonttLos Lagos Region49.9
- 18CuricóMaule Region48.3
- 19RengoO'Higgins Region44.7
- 20RancaguaO'Higgins Region40.0
+ 25 more cities, the next at 39.7 µg/m³
Not counted on this day, too few days measured: Hualqui since 12 May 2024.
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 reader for China's network. Turkey's network doesn't answer requests from outside the country, so we can't read it. Most cities there are missing from this board, not clean. Why.