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 20 Aug 2024: Nacimiento 83.2 µg/m³, Osorno 81.2 µg/m³ and Puerto Varas 74.6 µg/m³.
- 1NacimientoBiobio83.2
- 2OsornoLos Lagos Region81.2
- 3Puerto VarasLos Lagos Region74.6
- 4HualpénBiobio71.6
- 5VillarricaAraucania70.7
- 6CoyhaiqueAysén69.4
- 7TemucoAraucania63.3
- 8La UniónLos Ríos Region58.4
- 9ValdiviaLos Ríos Region57.9
- 10HualquiBiobio55.6
- 11CuricóMaule Region55.0
- 12CuranilahueBiobio53.0
- 13CoronelBiobio51.9
- 14ChillánÑuble51.2
- 15RancaguaO'Higgins Region50.9
- 16Puerto MonttLos Lagos Region50.5
- 17RengoO'Higgins Region50.4
- 18TalcaMaule Region46.7
- 19SantiagoSantiago Metropolitan46.3
- 20Los ÁngelesBiobio45.9
+ 24 more cities, the next at 45.6 µg/m³
Not counted on this day, too few days measured: Lota since 7 Aug 2024 and San Carlos since 18 Jul 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.