SmogRank / World / Chile / May 2025

Most polluted cities in Chile, May 2025

44 cities in Chile ranked by their average PM2.5 over the 31 days. Worst: Nacimiento at 70.2 µg/m³, #7 of 2,451 cities in the world. Cleanest: Calama at 17.4. A city needs measurements on 70% of the days to be ranked.

← Nacimiento 70.2 µg/m³ 70 µg/m³0
Every city in Chile ranked for May 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. 1NacimientoBiobio
    132
  2. 2Puerto VarasLos Lagos Region
    125
  3. 3HualpénBiobio
    121
  4. 4VillarricaAraucania
    115
  5. 5OsornoLos Lagos Region
    108
  6. 6LinaresMaule Region
    98
  7. 7CoyhaiqueAysén
    97
  8. 8San CarlosÑuble
    90
  9. 9TemucoAraucania
    88
  10. 10CuranilahueBiobio
    85
  11. 11CuricóMaule Region
    83
  12. 12TalcahuanoBiobio
    80
  13. 13SantiagoSantiago Metropolitan
    80
  14. 14ChillánÑuble
    76
  15. 15HualquiBiobio
    75
  16. 16TalaganteSantiago Metropolitan
    75
  17. 17CoronelBiobio
    75
  18. 18Puente AltoSantiago Metropolitan
    73
  19. 19Los ÁngelesBiobio
    73
  20. 20La UniónLos Ríos Region
    73
  21. 21TalcaMaule Region
    73
  22. 22ValdiviaLos Ríos Region
    71
  23. 23Puerto AysénAysén
    70
  24. 24RengoO'Higgins Region
    70
  25. 25Puerto MonttLos Lagos Region
    66
  26. 26RancaguaO'Higgins Region
    66
  27. 27CauquenesMaule Region
    54
  28. 28ToméBiobio
    53
  29. 29ChiguayanteBiobio
    53
  30. 30ConcónValparaiso
    51
  31. 31QuilpuéValparaiso
    51
  32. 31San Pedro de la PazBiobio
    51
  33. 33ConcepciónBiobio
    50
  34. 34QuinteroValparaiso
    47
  35. 35CoquimboCoquimbo Region
    45
  36. 36Viña del MarValparaiso
    43
  37. 37La SerenaCoquimbo Region
    42
  38. 38TocopillaAntofagasta
    42
  39. 39AntofagastaAntofagasta
    42
  40. 40CopiapóAtacama
    38
  41. 41AricaArica y Parinacota Region
    37
  42. 42LotaBiobio
    32
  43. 43Alto HospicioTarapacá
    30
  44. 44CalamaAntofagasta
    28
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, May 2025 · Chile now

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SmogRank, most polluted cities in Chile, PM2.5, May 2025, smogrank.com/cl/history/2025-05 (accessed 2 Oct 2026).

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