SmogRank / World / Chile / January 2023

Most polluted cities in Chile, January 2023

38 cities in Chile ranked by their average PM2.5 over the 31 days. Worst: Tocopilla at 29.1 µg/m³, #67 of 1,083 cities in the world. Cleanest: La Unión at 13.3. A city needs measurements on 70% of the days to be ranked.

OpenAQ's archive, where our readings come from, has almost none for 7 of these 31 days. Cities in the United States and Europe have them from the EPA's and the European Environment Agency's own records of the same monitors; elsewhere a city's average is over its other days. Why.

← Tocopilla 29.1 µg/m³ 20 µg/m³0
Every city in Chile ranked for January 2023, 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. 1TocopillaAntofagasta
    88
  2. 2NacimientoBiobio
    79
  3. 3SantiagoSantiago Metropolitan
    78
  4. 4RancaguaO'Higgins Region
    78
  5. 5AricaArica y Parinacota Region
    76
  6. 6Puente AltoSantiago Metropolitan
    76
  7. 7TalaganteSantiago Metropolitan
    75
  8. 8QuinteroValparaiso
    75
  9. 9HualpénBiobio
    74
  10. 10Viña del MarValparaiso
    72
  11. 10ConcónValparaiso
    72
  12. 12QuillotaValparaiso
    71
  13. 13RengoO'Higgins Region
    71
  14. 13CuricóMaule Region
    71
  15. 15La SerenaCoquimbo Region
    70
  16. 16CalamaAntofagasta
    69
  17. 17TalcahuanoBiobio
    69
  18. 18AntofagastaAntofagasta
    68
  19. 18San Pedro de la PazBiobio
    68
  20. 20LinaresMaule Region
    68
  21. 21CoronelBiobio
    68
  22. 22CopiapóAtacama
    67
  23. 23ToméBiobio
    67
  24. 24HualquiBiobio
    67
  25. 24CuranilahueBiobio
    67
  26. 26TalcaMaule Region
    66
  27. 26Los ÁngelesBiobio
    66
  28. 28ChiguayanteBiobio
    65
  29. 29CauquenesMaule Region
    65
  30. 30ConcepciónBiobio
    65
  31. 31Puerto VarasLos Lagos Region
    62
  32. 32Puerto AysénAysén
    62
  33. 33TemucoAraucania
    61
  34. 34Puerto MonttLos Lagos Region
    61
  35. 34CoyhaiqueAysén
    61
  36. 36ChillánÑuble
    60
  37. 37OsornoLos Lagos Region
    59
  38. 38La UniónLos Ríos Region
    59
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, January 2023 · Chile now

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SmogRank, most polluted cities in Chile, PM2.5, January 2023, smogrank.com/cl/history/2023-01 (accessed 2 Oct 2026).

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