SmogRank / World / Chile / October 2025

Most polluted cities in Chile, October 2025

38 cities in Chile ranked by their average PM2.5 over the 31 days. Worst: Puerto Varas at 32.2 µg/m³, #183 of 2,296 cities in the world. Cleanest: Tomé at 15.0. A city needs measurements on 70% of the days to be ranked.

← Puerto Varas 32.2 µg/m³ 30 µg/m³0
Every city in Chile ranked for October 2025, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1Puerto VarasLos Lagos Region
    3
  2. 2CoyhaiqueAysén
    3
  3. 3NacimientoBiobio
    3
  4. 4Puerto MonttLos Lagos Region
    3
  5. 5OsornoLos Lagos Region
    3
  6. 6VillarricaAraucania
    3
  7. 7Puente AltoSantiago Metropolitan
    3
  8. 8ConcónValparaiso
    3
  9. 9TocopillaAntofagasta
    2
  10. 10AricaArica y Parinacota Region
    2
  11. 11SantiagoSantiago Metropolitan
    2
  12. 12TalaganteSantiago Metropolitan
    2
  13. 13QuinteroValparaiso
    2
  14. 13HualpénBiobio
    2
  15. 15RancaguaO'Higgins Region
    2
  16. 15CuricóMaule Region
    2
  17. 17Puerto AysénAysén
    2
  18. 18CopiapóAtacama
    2
  19. 19ValdiviaLos Ríos Region
    2
  20. 19CoronelBiobio
    2
  21. 19AntofagastaAntofagasta
    2
  22. 22QuilpuéValparaiso
    2
  23. 23HualquiBiobio
    2
  24. 24Viña del MarValparaiso
    2
  25. 25RengoO'Higgins Region
    2
  26. 26QuillotaValparaiso
    2
  27. 27Los ÁngelesBiobio
    2
  28. 28TemucoAraucania
    2
  29. 29Alto HospicioTarapacá
    2
  30. 30CuranilahueBiobio
    2
  31. 31CoquimboCoquimbo Region
    2
  32. 32TalcaMaule Region
    2
  33. 32CalamaAntofagasta
    2
  34. 34ChiguayanteBiobio
    2
  35. 35San Pedro de la PazBiobio
    2
  36. 36ChillánÑuble
    2
  37. 37TalcahuanoBiobio
    2
  38. 38ToméBiobio
    2
Low1–3
Moderate4–6
High7–9
Very high10

The UK's Daily Air Quality Index (1 to 10), PM2.5 bands. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, October 2025 · Chile now

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SmogRank, most polluted cities in Chile, PM2.5, October 2025, smogrank.com/cl/history/2025-10 (accessed 2 Oct 2026).

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