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
    53
  2. 2CoyhaiqueAysén
    50
  3. 3NacimientoBiobio
    47
  4. 4Puerto MonttLos Lagos Region
    45
  5. 5OsornoLos Lagos Region
    43
  6. 6VillarricaAraucania
    43
  7. 7Puente AltoSantiago Metropolitan
    42
  8. 8ConcónValparaiso
    42
  9. 9TocopillaAntofagasta
    38
  10. 10AricaArica y Parinacota Region
    38
  11. 11SantiagoSantiago Metropolitan
    38
  12. 12TalaganteSantiago Metropolitan
    37
  13. 13QuinteroValparaiso
    37
  14. 13HualpénBiobio
    37
  15. 15RancaguaO'Higgins Region
    35
  16. 15CuricóMaule Region
    35
  17. 17Puerto AysénAysén
    35
  18. 18CopiapóAtacama
    35
  19. 19ValdiviaLos Ríos Region
    33
  20. 19CoronelBiobio
    33
  21. 19AntofagastaAntofagasta
    33
  22. 22QuilpuéValparaiso
    32
  23. 23HualquiBiobio
    32
  24. 24Viña del MarValparaiso
    32
  25. 25RengoO'Higgins Region
    32
  26. 26QuillotaValparaiso
    30
  27. 27Los ÁngelesBiobio
    30
  28. 28TemucoAraucania
    30
  29. 29Alto HospicioTarapacá
    30
  30. 30CuranilahueBiobio
    30
  31. 31CoquimboCoquimbo Region
    28
  32. 32TalcaMaule Region
    28
  33. 32CalamaAntofagasta
    28
  34. 34ChiguayanteBiobio
    28
  35. 35San Pedro de la PazBiobio
    27
  36. 36ChillánÑuble
    27
  37. 37TalcahuanoBiobio
    25
  38. 38ToméBiobio
    25
Good0–50
Satisfactory51–100
Moderate101–200
Poor201–300
Very poor301–400
Severe401+

India's National Air Quality Index (CPCB), PM2.5 sub-index. 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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