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 27 Jul 2023: Coyhaique 111.7 µg/m³, Hualpén 82.7 µg/m³ and Nacimiento 81.5 µg/m³.
- 1CoyhaiqueAysén111.7
- 2HualpénBiobio82.7
- 3NacimientoBiobio81.5
- 4OsornoLos Lagos Region80.6
- 5Puerto VarasLos Lagos Region71.6
- 6LajaBiobio71.0
- 7RancaguaO'Higgins Region56.4
- 8CuranilahueBiobio56.2
- 9LinaresMaule Region54.8
- 10TalcahuanoBiobio54.3
- 11TemucoAraucania53.8
- 12Puerto MonttLos Lagos Region53.2
- 13San CarlosÑuble52.9
- 14Puerto AysénAysén52.2
- 15RengoO'Higgins Region52.1
- 16ChillánÑuble51.7
- 17SantiagoSantiago Metropolitan51.5
- 18TalaganteSantiago Metropolitan51.3
- 19Los ÁngelesBiobio50.3
- 20La UniónLos Ríos Region49.8
+ 26 more cities, the next at 48.9 µg/m³
Days missing from the source archive fall in this window, so fewer countries are counted.
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.