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 to13 Mar 2026 That day's board

The worst cities in Chile for PM2.5 over the 30 days to 13 Mar 2026: Tocopilla 27.2 µg/m³, Copiapó 27.1 µg/m³ and Hualpén 26.7 µg/m³.

  1. 1TocopillaAntofagasta27.2
  2. 2CopiapóAtacama27.1
  3. 3HualpénBiobio26.7
  4. 4TalaganteSantiago Metropolitan24.6
  5. 5PuchuncavíValparaiso22.8
  6. 6AricaArica y Parinacota Region22.6
  7. 7QuinteroValparaiso22.0
  8. 8Puente AltoSantiago Metropolitan22.0
  9. 9RancaguaO'Higgins Region21.9
  10. 10SantiagoSantiago Metropolitan21.0
  11. 11CoyhaiqueAysén20.7
  12. 12ConcónValparaiso20.6
  13. 13Puerto VarasLos Lagos Region20.4
  14. 14CuricóMaule Region20.4
  15. 15Viña del MarValparaiso20.1
  16. 16La SerenaCoquimbo Region19.1
  17. 17QuilpuéValparaiso18.4
  18. 18RengoO'Higgins Region18.2
  19. 19QuillotaValparaiso18.2
  20. 20San Pedro de la PazBiobio18.0

+ 24 more cities, 17.9 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.