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 10 Nov 2025: Puerto Varas 28.5 µg/m³, Puente Alto 25.0 µg/m³ and Coyhaique 24.3 µg/m³.
- 1Puerto VarasLos Lagos Region28.5
- 2Puente AltoSantiago Metropolitan25.0
- 3CoyhaiqueAysén24.3
- 4TocopillaAntofagasta24.1
- 5ConcónValparaiso24.1
- 6AricaArica y Parinacota Region23.9
- 7OsornoLos Lagos Region22.4
- 8VillarricaAraucania22.2
- 9PuchuncavíValparaiso21.8
- 10SantiagoSantiago Metropolitan21.1
- 11QuinteroValparaiso21.1
- 12Puerto MonttLos Lagos Region21.1
- 13TalaganteSantiago Metropolitan20.6
- 14RancaguaO'Higgins Region20.6
- 15CopiapóAtacama20.2
- 16La SerenaCoquimbo Region19.1
- 17CoronelBiobio19.1
- 18Alto HospicioTarapacá18.9
- 19AntofagastaAntofagasta18.8
- 20Viña del MarValparaiso18.3
+ 15 more cities, 18.3 µg/m³ and below
Not counted on this day, too few days measured: Quilpué since 10 Nov 2025, Curanilahue since 10 Nov 2025, Tomé since 4 Nov 2025 and 7 more cities.
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 readers for them. Most cities there are missing from this board, not clean. Why.