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.

CountriesCities
The 30 days to10 Mar 2026 That day's board

The worst cities in Chile for PM2.5 over the 30 days to 10 Mar 2026: Copiapó 27.0 µg/m³, Tocopilla 26.6 µg/m³ and Hualpén 25.7 µg/m³.

  1. 1CopiapóAtacama27.0
  2. 2TocopillaAntofagasta26.6
  3. 3HualpénBiobio25.7
  4. 4TalaganteSantiago Metropolitan24.6
  5. 5PuchuncavíValparaiso22.3
  6. 6AricaArica y Parinacota Region22.0
  7. 7QuinteroValparaiso21.4
  8. 8Puente AltoSantiago Metropolitan21.4
  9. 9RancaguaO'Higgins Region21.3
  10. 10CoyhaiqueAysén20.6
  11. 11SantiagoSantiago Metropolitan20.2
  12. 12ConcónValparaiso20.1
  13. 13CuricóMaule Region19.8
  14. 14Puerto VarasLos Lagos Region19.7
  15. 15Viña del MarValparaiso19.6
  16. 16La SerenaCoquimbo Region18.8
  17. 17RengoO'Higgins Region18.0
  18. 18QuilpuéValparaiso17.8
  19. 19QuillotaValparaiso17.8
  20. 20San Pedro de la PazBiobio17.6

+ 23 more cities, 17.4 µg/m³ and below

Not counted on this day, too few days measured: San Carlos since 16 Feb 2026, Laja since 15 Feb 2026 and Cauquenes since 13 Feb 2026.

30 days7 days
GoodModerateSensitive groupsUnhealthyVery unhealthyHazardousWHO 24-hour guideline, 15 µg/m³Fades where it stood: not counted that 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.