SmogRank / World / Chile / August 2025

Most polluted cities in Chile, August 2025

45 cities in Chile ranked by their average PM2.5 over the 31 days. Worst: Coyhaique at 85.3 µg/m³, #3 of 2,503 cities in the world. Cleanest: Alto Hospicio at 16.5. A city needs measurements on 70% of the days to be ranked.

← Coyhaique 85.3 µg/m³ 80 µg/m³0
Every city in Chile ranked for August 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. 1CoyhaiqueAysén
    85.3
  2. 2NacimientoBiobio
    63.3
  3. 3OsornoLos Lagos Region
    59.9
  4. 4Puerto VarasLos Lagos Region
    58.8
  5. 5VillarricaAraucania
    45.7
  6. 6HualpénBiobio
    45.5
  7. 7San CarlosÑuble
    44.0
  8. 8Puerto MonttLos Lagos Region
    43.7
  9. 9LinaresMaule Region
    43.6
  10. 10CuricóMaule Region
    43.3
  11. 11ValdiviaLos Ríos Region
    42.4
  12. 12La UniónLos Ríos Region
    41.9
  13. 13CuranilahueBiobio
    41.6
  14. 14Puerto AysénAysén
    39.5
  15. 15RengoO'Higgins Region
    39.0
  16. 16ChillánÑuble
    38.5
  17. 17Los ÁngelesBiobio
    37.6
  18. 18TemucoAraucania
    37.0
  19. 19RancaguaO'Higgins Region
    36.6
  20. 20HualquiBiobio
    36.3
  21. 21TalaganteSantiago Metropolitan
    36.2
  22. 22CoronelBiobio
    34.9
  23. 23SantiagoSantiago Metropolitan
    34.4
  24. 24TalcaMaule Region
    33.2
  25. 25Puente AltoSantiago Metropolitan
    31.8
  26. 26TalcahuanoBiobio
    30.2
  27. 27QuilpuéValparaiso
    29.6
  28. 28ConcónValparaiso
    26.1
  29. 29ConcepciónBiobio
    26.0
  30. 30CauquenesMaule Region
    25.4
  31. 31ChiguayanteBiobio
    24.8
  32. 32QuillotaValparaiso
    24.0
  33. 33QuinteroValparaiso
    23.9
  34. 34TocopillaAntofagasta
    23.6
  35. 35San Pedro de la PazBiobio
    23.4
  36. 36ToméBiobio
    23.0
  37. 37AntofagastaAntofagasta
    22.4
  38. 38CopiapóAtacama
    22.2
  39. 39La SerenaCoquimbo Region
    21.7
  40. 40AricaArica y Parinacota Region
    19.7
  41. 41CoquimboCoquimbo Region
    19.5
  42. 42Viña del MarValparaiso
    19.0
  43. 43LotaBiobio
    17.8
  44. 44CalamaAntofagasta
    17.2
  45. 45Alto HospicioTarapacá
    16.5
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

PM2.5 in µg/m³, coloured by the US EPA's PM2.5 categories. 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, August 2025 · Chile now

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SmogRank, most polluted cities in Chile, PM2.5, August 2025, smogrank.com/cl/history/2025-08 (accessed 2 Oct 2026).

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