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 May 2023: Osorno 66.3 µg/m³, Nacimiento 56.3 µg/m³ and Puerto Varas 55.2 µg/m³.
- 1OsornoLos Lagos Region66.3
- 2NacimientoBiobio56.3
- 3Puerto VarasLos Lagos Region55.2
- 4LinaresMaule Region52.5
- 5CoyhaiqueAysén52.2
- 6SantiagoSantiago Metropolitan47.4
- 7LajaBiobio47.2
- 8CuricóMaule Region47.2
- 9RancaguaO'Higgins Region45.5
- 10HualquiBiobio44.6
- 11TalaganteSantiago Metropolitan44.1
- 12San CarlosÑuble42.8
- 13CoronelBiobio41.9
- 14La UniónLos Ríos Region41.3
- 15Puerto MonttLos Lagos Region40.8
- 16Puente AltoSantiago Metropolitan38.6
- 17CuranilahueBiobio38.6
- 18Puerto AysénAysén38.5
- 19ChillánÑuble38.4
- 20QuillotaValparaiso36.5
+ 24 more cities, the next at 34.7 µg/m³
Not counted on this day, too few days measured: Hualpén since 20 May 2023 and Rengo since 9 May 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.