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 17 May 2025: Nacimiento 59.5 µg/m³, Linares 56.9 µg/m³ and Villarrica 56.3 µg/m³.
- 1NacimientoBiobio59.5
- 2LinaresMaule Region56.9
- 3VillarricaAraucania56.3
- 4CoyhaiqueAysén54.4
- 5San CarlosÑuble51.6
- 6HualpénBiobio50.2
- 7LajaBiobio46.2
- 8ChillánÑuble45.9
- 9CuricóMaule Region41.7
- 10CuranilahueBiobio41.6
- 11SantiagoSantiago Metropolitan41.2
- 12Puente AltoSantiago Metropolitan40.9
- 13OsornoLos Lagos Region40.8
- 14TalcaMaule Region39.9
- 15Puerto VarasLos Lagos Region39.6
- 16Los ÁngelesBiobio39.6
- 17TalcahuanoBiobio38.4
- 18CoronelBiobio37.1
- 19TemucoAraucania36.7
- 20TalaganteSantiago Metropolitan36.5
+ 27 more cities, the next at 36.5 µg/m³
Not counted on this day, too few days measured: Hualqui since 27 Apr 2025.
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.