SmogRank / Countries / France / January 2026

Most polluted cities in France, January 2026

51 cities in France ranked by their average PM2.5 over the 31 days. Worst: Mulhouse at 17.8 µg/m³, #377 of 2,047 cities in the world. Cleanest: Caen at 5.9. A city needs measurements on 70% of the days to be ranked.

  1. 1MulhouseGrand Est
    17.8
  2. 2Saint-AvoldGrand Est
    14.9
  3. 3CoulommiersÎle-de-France
    14.5
  4. 4AvignonProvence-Alpes-Côte d'Azur
    14.1
  5. 5RoubaixHauts-de-France
    13.5
  6. 6DunkirkHauts-de-France
    13.1
  7. 7LilleHauts-de-France
    12.9
  8. 8ÉpinalGrand Est
    12.8
  9. 9BéthuneHauts-de-France
    12.7
  10. 10VannesBrittany
    12.5
  11. 11RouenNormandy
    12.3
  12. 12ValenciennesHauts-de-France
    12.1
  13. 12CalaisHauts-de-France
    12.1
  14. 14DenainHauts-de-France
    12.0
  15. 15ArlesProvence-Alpes-Côte d'Azur
    11.6
  16. 16ParisÎle-de-France
    11.4
  17. 17MoulinsAuvergne-Rhône-Alpes
    10.9
  18. 17CreilHauts-de-France
    10.9
  19. 17BeauvaisHauts-de-France
    10.9
  20. 20Saint-QuentinHauts-de-France
    10.7
  21. 21MarignaneProvence-Alpes-Côte d'Azur
    10.6
  22. 22QuimperBrittany
    10.5
  23. 23LorientBrittany
    10.4
  24. 24AmiensHauts-de-France
    10.3
  25. 25Aix-en-ProvenceProvence-Alpes-Côte d'Azur
    10.2
  26. 26NeversBourgogne-Franche-Comté
    9.9
  27. 26AlençonNormandy
    9.9
  28. 28ReimsGrand Est
    9.8
  29. 29PoitiersNew Aquitaine
    9.7
  30. 30NiceProvence-Alpes-Côte d'Azur
    9.5
  31. 31AuxerreBourgogne-Franche-Comté
    9.4
  32. 32Boulogne-sur-MerHauts-de-France
    9.3
  33. 33RambouilletÎle-de-France
    9.2
  34. 34Clermont-FerrandAuvergne-Rhône-Alpes
    9.0
  35. 35MarseilleProvence-Alpes-Côte d'Azur
    8.8
  36. 35ÉvreuxNormandy
    8.8
  37. 37CannesProvence-Alpes-Côte d'Azur
    8.6
  38. 38DomontÎle-de-France
    8.5
  39. 39NiortNew Aquitaine
    8.4
  40. 40Salon-de-ProvenceProvence-Alpes-Côte d'Azur
    8.2
  41. 41Le HavreNormandy
    7.9
  42. 42AngoulêmeNew Aquitaine
    7.7
  43. 43MontluçonAuvergne-Rhône-Alpes
    7.5
  44. 44BrestBrittany
    7.1
  45. 45FontainebleauÎle-de-France
    7.0
  46. 46ÉtampesÎle-de-France
    6.8
  47. 47DieppeNormandy
    6.5
  48. 48MontivilliersNormandy
    6.4
  49. 49CherbourgNormandy
    6.1
  50. 49AurillacAuvergne-Rhône-Alpes
    6.1
  51. 51CaenNormandy
    5.9
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

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