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 23 Mar 2024: Puerto Montt 32.9 µg/m³, Coyhaique 26.2 µg/m³ and Tocopilla 24.0 µg/m³.
- 1Puerto MonttLos Lagos Region32.9
- 2CoyhaiqueAysén26.2
- 3TocopillaAntofagasta24.0
- 4Puente AltoSantiago Metropolitan23.6
- 5PuchuncavíValparaiso23.6
- 6Puerto VarasLos Lagos Region23.5
- 7HualpénBiobio23.4
- 8SantiagoSantiago Metropolitan22.6
- 9QuinteroValparaiso22.4
- 10QuillotaValparaiso21.2
- 11Viña del MarValparaiso21.1
- 12TalaganteSantiago Metropolitan20.9
- 13San CarlosÑuble20.5
- 14Puerto AysénAysén20.5
- 15ConcónValparaiso20.2
- 16NacimientoBiobio20.1
- 17CoronelBiobio19.8
- 18AricaArica y Parinacota Region19.6
- 19San Pedro de la PazBiobio19.1
- 20La UniónLos Ríos Region18.9
+ 23 more cities, the next at 18.8 µg/m³
Not counted on this day, too few days measured: Rengo since 9 Mar 2024 and Alto Hospicio since 3 Mar 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.