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 21 Jul 2024: Coyhaique 99.7 µg/m³, Hualpén 86.5 µg/m³ and Nacimiento 78.8 µg/m³.
- 1CoyhaiqueAysén99.7
- 2HualpénBiobio86.5
- 3NacimientoBiobio78.8
- 4RancaguaO'Higgins Region78.2
- 5VillarricaAraucania77.1
- 6Puerto VarasLos Lagos Region75.5
- 7OsornoLos Lagos Region74.5
- 8TemucoAraucania73.1
- 9CuricóMaule Region69.4
- 10RengoO'Higgins Region68.5
- 11TalcahuanoBiobio63.7
- 12HualquiBiobio62.0
- 13ChillánÑuble61.6
- 14La UniónLos Ríos Region60.4
- 15SantiagoSantiago Metropolitan59.5
- 16Puerto MonttLos Lagos Region58.7
- 17ValdiviaLos Ríos Region58.5
- 18CauquenesMaule Region58.2
- 19CuranilahueBiobio58.0
- 20TalaganteSantiago Metropolitan57.9
+ 24 more cities, the next at 54.3 µg/m³
Not counted on this day, too few days measured: San Carlos since 18 Jul 2024, Quilpué since 22 Jun 2024 and Laja since 13 Jun 2024.
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.