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
    9
  2. 2Puerto VarasLos Lagos Region
    9
  3. 3HualpénBiobio
    9
  4. 4VillarricaAraucania
    9
  5. 5OsornoLos Lagos Region
    8
  6. 6LinaresMaule Region
    8
  7. 7CoyhaiqueAysén
    7
  8. 8San CarlosÑuble
    7
  9. 9TemucoAraucania
    6
  10. 10CuranilahueBiobio
    6
  11. 11CuricóMaule Region
    6
  12. 12TalcahuanoBiobio
    6
  13. 13SantiagoSantiago Metropolitan
    6
  14. 14ChillánÑuble
    5
  15. 15HualquiBiobio
    5
  16. 16TalaganteSantiago Metropolitan
    5
  17. 17CoronelBiobio
    5
  18. 18Puente AltoSantiago Metropolitan
    5
  19. 19Los ÁngelesBiobio
    5
  20. 20La UniónLos Ríos Region
    5
  21. 21TalcaMaule Region
    5
  22. 22ValdiviaLos Ríos Region
    5
  23. 23Puerto AysénAysén
    5
  24. 24RengoO'Higgins Region
    5
  25. 25Puerto MonttLos Lagos Region
    4
  26. 26RancaguaO'Higgins Region
    4
  27. 27CauquenesMaule Region
    3
  28. 28ToméBiobio
    3
  29. 29ChiguayanteBiobio
    3
  30. 30ConcónValparaiso
    3
  31. 31QuilpuéValparaiso
    3
  32. 31San Pedro de la PazBiobio
    3
  33. 33ConcepciónBiobio
    3
  34. 34QuinteroValparaiso
    3
  35. 35CoquimboCoquimbo Region
    3
  36. 36Viña del MarValparaiso
    3
  37. 37La SerenaCoquimbo Region
    3
  38. 38TocopillaAntofagasta
    3
  39. 39AntofagastaAntofagasta
    3
  40. 40CopiapóAtacama
    2
  41. 41AricaArica y Parinacota Region
    2
  42. 42LotaBiobio
    2
  43. 43Alto HospicioTarapacá
    2
  44. 44CalamaAntofagasta
    2
Low1–3
Moderate4–6
High7–9
Very high10

The UK's Daily Air Quality Index (1 to 10), PM2.5 bands. 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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