SmogRank / World / Chile / March 2025

Most polluted cities in Chile, March 2025

42 cities in Chile ranked by their average PM2.5 over the 31 days. Worst: Coyhaique at 36.4 µg/m³, #205 of 2,500 cities in the world. Cleanest: Lota at 16.1. A city needs measurements on 70% of the days to be ranked.

← Coyhaique 36.4 µg/m³ 30 µg/m³0
Every city in Chile ranked for March 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
    103
  2. 2ChiguayanteBiobio
    92
  3. 3TocopillaAntofagasta
    87
  4. 4HualpénBiobio
    85
  5. 5ConcónValparaiso
    83
  6. 6NacimientoBiobio
    83
  7. 7Puente AltoSantiago Metropolitan
    80
  8. 8SantiagoSantiago Metropolitan
    77
  9. 9Puerto VarasLos Lagos Region
    75
  10. 10QuinteroValparaiso
    75
  11. 11AricaArica y Parinacota Region
    75
  12. 12Viña del MarValparaiso
    74
  13. 12Puerto AysénAysén
    74
  14. 12CopiapóAtacama
    74
  15. 15TalcaMaule Region
    74
  16. 16QuillotaValparaiso
    73
  17. 17CoronelBiobio
    73
  18. 18VillarricaAraucania
    72
  19. 19CoquimboCoquimbo Region
    72
  20. 20TalcahuanoBiobio
    72
  21. 20San CarlosÑuble
    72
  22. 20RancaguaO'Higgins Region
    72
  23. 23HualquiBiobio
    71
  24. 23San Pedro de la PazBiobio
    71
  25. 25LinaresMaule Region
    71
  26. 25AntofagastaAntofagasta
    71
  27. 27QuilpuéValparaiso
    71
  28. 28ToméBiobio
    70
  29. 29TalaganteSantiago Metropolitan
    70
  30. 30OsornoLos Lagos Region
    70
  31. 31CauquenesMaule Region
    70
  32. 32RengoO'Higgins Region
    69
  33. 33Los ÁngelesBiobio
    69
  34. 33La SerenaCoquimbo Region
    69
  35. 35Puerto MonttLos Lagos Region
    68
  36. 36TemucoAraucania
    68
  37. 37CalamaAntofagasta
    67
  38. 38ConcepciónBiobio
    66
  39. 39Alto HospicioTarapacá
    66
  40. 40ChillánÑuble
    65
  41. 41ValdiviaLos Ríos Region
    65
  42. 42LotaBiobio
    64
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, March 2025 · Chile now

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SmogRank, most polluted cities in Chile, PM2.5, March 2025, smogrank.com/cl/history/2025-03 (accessed 2 Oct 2026).

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