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
    172
  2. 2NacimientoBiobio
    156
  3. 3OsornoLos Lagos Region
    154
  4. 4Puerto VarasLos Lagos Region
    153
  5. 5VillarricaAraucania
    126
  6. 6HualpénBiobio
    126
  7. 7San CarlosÑuble
    122
  8. 8Puerto MonttLos Lagos Region
    121
  9. 9LinaresMaule Region
    121
  10. 10CuricóMaule Region
    120
  11. 11ValdiviaLos Ríos Region
    118
  12. 12La UniónLos Ríos Region
    117
  13. 13CuranilahueBiobio
    116
  14. 14Puerto AysénAysén
    111
  15. 15RengoO'Higgins Region
    110
  16. 16ChillánÑuble
    108
  17. 17Los ÁngelesBiobio
    106
  18. 18TemucoAraucania
    105
  19. 19RancaguaO'Higgins Region
    104
  20. 20HualquiBiobio
    103
  21. 21TalaganteSantiago Metropolitan
    103
  22. 22CoronelBiobio
    99
  23. 23SantiagoSantiago Metropolitan
    98
  24. 24TalcaMaule Region
    96
  25. 25Puente AltoSantiago Metropolitan
    93
  26. 26TalcahuanoBiobio
    90
  27. 27QuilpuéValparaiso
    89
  28. 28ConcónValparaiso
    83
  29. 29ConcepciónBiobio
    82
  30. 30CauquenesMaule Region
    81
  31. 31ChiguayanteBiobio
    80
  32. 32QuillotaValparaiso
    79
  33. 33QuinteroValparaiso
    79
  34. 34TocopillaAntofagasta
    78
  35. 35San Pedro de la PazBiobio
    78
  36. 36ToméBiobio
    77
  37. 37AntofagastaAntofagasta
    76
  38. 38CopiapóAtacama
    75
  39. 39La SerenaCoquimbo Region
    74
  40. 40AricaArica y Parinacota Region
    71
  41. 41CoquimboCoquimbo Region
    70
  42. 42Viña del MarValparaiso
    69
  43. 43LotaBiobio
    67
  44. 44CalamaAntofagasta
    66
  45. 45Alto HospicioTarapacá
    65
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). 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

Use this board

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

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.