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 26 Aug 2023: Nacimiento 75.1 µg/m³, Coyhaique 69.3 µg/m³ and Osorno 68.1 µg/m³.
- 1NacimientoBiobio75.1
- 2CoyhaiqueAysén69.3
- 3OsornoLos Lagos Region68.1
- 4Puerto VarasLos Lagos Region61.2
- 5San CarlosÑuble51.0
- 6LinaresMaule Region49.5
- 7La UniónLos Ríos Region47.3
- 8TemucoAraucania47.2
- 9Los ÁngelesBiobio46.1
- 10ChillánÑuble46.0
- 11CuranilahueBiobio45.5
- 12CoronelBiobio44.6
- 13CuricóMaule Region44.0
- 14Puerto MonttLos Lagos Region43.7
- 15HualquiBiobio41.5
- 16ValdiviaLos Ríos Region40.4
- 17SantiagoSantiago Metropolitan39.8
- 18RancaguaO'Higgins Region39.4
- 19RengoO'Higgins Region39.1
- 20Puerto AysénAysén38.5
+ 24 more cities, the next at 36.8 µg/m³
Not counted on this day, too few days measured: Laja since 31 Jul 2023 and Hualpén since 30 Jul 2023.
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.