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 28 Apr 2023: Coyhaique 54.0 µg/m³, Osorno 41.0 µg/m³ and Puerto Varas 39.8 µg/m³.
- 1CoyhaiqueAysén54.0
- 2OsornoLos Lagos Region41.0
- 3Puerto VarasLos Lagos Region39.8
- 4San CarlosÑuble36.0
- 5LinaresMaule Region35.5
- 6ChillánÑuble34.7
- 7NacimientoBiobio34.5
- 8Puerto MonttLos Lagos Region32.1
- 9RancaguaO'Higgins Region31.8
- 10CuricóMaule Region31.4
- 11Puerto AysénAysén31.2
- 12SantiagoSantiago Metropolitan30.2
- 13CuranilahueBiobio29.8
- 14ValdiviaLos Ríos Region29.3
- 15HualpénBiobio28.9
- 16LajaBiobio28.6
- 17La UniónLos Ríos Region28.4
- 18TalaganteSantiago Metropolitan28.3
- 19TalcaMaule Region27.9
- 20Puente AltoSantiago Metropolitan27.5
+ 25 more cities, the next at 27.5 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.