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
Every city in Chile ranked for May 2025, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1NacimientoBiobio
    70.2
  2. 2Puerto VarasLos Lagos Region
    67.7
  3. 3HualpénBiobio
    67.1
  4. 4VillarricaAraucania
    64.5
  5. 5OsornoLos Lagos Region
    63.4
  6. 6LinaresMaule Region
    58.9
  7. 7CoyhaiqueAysén
    58.4
  8. 8San CarlosÑuble
    54.0
  9. 9TemucoAraucania
    53.1
  10. 10CuranilahueBiobio
    51.3
  11. 11CuricóMaule Region
    50.3
  12. 12TalcahuanoBiobio
    48.4
  13. 13SantiagoSantiago Metropolitan
    47.8
  14. 14ChillánÑuble
    45.8
  15. 15HualquiBiobio
    45.1
  16. 16TalaganteSantiago Metropolitan
    45.0
  17. 17CoronelBiobio
    44.7
  18. 18Puente AltoSantiago Metropolitan
    44.3
  19. 19Los ÁngelesBiobio
    44.0
  20. 20La UniónLos Ríos Region
    43.7
  21. 21TalcaMaule Region
    43.6
  22. 22ValdiviaLos Ríos Region
    43.3
  23. 23Puerto AysénAysén
    42.0
  24. 24RengoO'Higgins Region
    41.9
  25. 25Puerto MonttLos Lagos Region
    39.9
  26. 26RancaguaO'Higgins Region
    39.7
  27. 27CauquenesMaule Region
    33.0
  28. 28ToméBiobio
    32.4
  29. 29ChiguayanteBiobio
    31.9
  30. 30ConcónValparaiso
    31.2
  31. 31QuilpuéValparaiso
    30.6
  32. 31San Pedro de la PazBiobio
    30.6
  33. 33ConcepciónBiobio
    30.4
  34. 34QuinteroValparaiso
    27.9
  35. 35CoquimboCoquimbo Region
    26.6
  36. 36Viña del MarValparaiso
    26.1
  37. 37La SerenaCoquimbo Region
    25.1
  38. 38TocopillaAntofagasta
    24.8
  39. 39AntofagastaAntofagasta
    24.7
  40. 40CopiapóAtacama
    23.4
  41. 41AricaArica y Parinacota Region
    22.0
  42. 42LotaBiobio
    18.7
  43. 43Alto HospicioTarapacá
    17.8
  44. 44CalamaAntofagasta
    17.4
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, 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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