SmogRank / Countries / France / September 2026

Most polluted cities in France, September 2026

102 cities in France ranked by their average PM2.5 over the 30 days. Worst: Nice at 9.2 µg/m³, #467 of 2,332 cities in the world. Cleanest: Aurillac at 3.3. A city needs measurements on 70% of the days to be ranked.

  1. 1NiceProvence-Alpes-Côte d'Azur
    9.2
  2. 2ValenciennesHauts-de-France
    7.8
  3. 3RoubaixHauts-de-France
    7.3
  4. 4ParisÎle-de-France
    7.2
  5. 4MarseilleProvence-Alpes-Côte d'Azur
    7.2
  6. 4DunkirkHauts-de-France
    7.2
  7. 4ArlesProvence-Alpes-Côte d'Azur
    7.2
  8. 8CannesProvence-Alpes-Côte d'Azur
    7.1
  9. 9NancyGrand Est
    7.0
  10. 10ThionvilleGrand Est
    6.7
  11. 10ReimsGrand Est
    6.7
  12. 10MarignaneProvence-Alpes-Côte d'Azur
    6.7
  13. 13CalaisHauts-de-France
    6.6
  14. 14ToulouseOccitanie
    6.5
  15. 15StrasbourgGrand Est
    6.4
  16. 16TarbesOccitanie
    6.3
  17. 16LunévilleGrand Est
    6.3
  18. 16BrestBrittany
    6.3
  19. 19MontpellierOccitanie
    6.2
  20. 19Mont-de-MarsanNew Aquitaine
    6.2
  21. 19MetzGrand Est
    6.2
  22. 19Boulogne-sur-MerHauts-de-France
    6.2
  23. 23PerpignanOccitanie
    6.1
  24. 23PauNew Aquitaine
    6.1
  25. 23Le HavreNormandy
    6.1
  26. 26RouenNormandy
    6.0
  27. 26MulhouseGrand Est
    6.0
  28. 26LilleHauts-de-France
    6.0
  29. 26GrenobleAuvergne-Rhône-Alpes
    6.0
  30. 26AlbertvilleAuvergne-Rhône-Alpes
    6.0
  31. 31Salon-de-ProvenceProvence-Alpes-Côte d'Azur
    5.9
  32. 31BéthuneHauts-de-France
    5.9
  33. 31BastiaCorsica
    5.9
  34. 34Saint-QuentinHauts-de-France
    5.8
  35. 34NîmesOccitanie
    5.8
  36. 34LourdesOccitanie
    5.8
  37. 34DenainHauts-de-France
    5.8
  38. 34AnnemasseAuvergne-Rhône-Alpes
    5.8
  39. 34Aix-en-ProvenceProvence-Alpes-Côte d'Azur
    5.8
  40. 40LyonAuvergne-Rhône-Alpes
    5.7
  41. 40AvignonProvence-Alpes-Côte d'Azur
    5.7
  42. 42RambouilletÎle-de-France
    5.6
  43. 42DreuxCentre-Val de Loire
    5.6
  44. 42DouaiHauts-de-France
    5.6
  45. 45CoulommiersÎle-de-France
    5.5
  46. 45AmiensHauts-de-France
    5.5
  47. 45AlbiOccitanie
    5.5
  48. 48RennesBrittany
    5.4
  49. 48PoitiersNew Aquitaine
    5.4
  50. 48MontargisCentre-Val de Loire
    5.4
  51. 48CreilHauts-de-France
    5.4
  52. 48ChartresCentre-Val de Loire
    5.4
  53. 48CastresOccitanie
    5.4
  54. 54Romans-sur-IsèreAuvergne-Rhône-Alpes
    5.3
  55. 54LouviersNormandy
    5.3
  56. 54DieppeNormandy
    5.3
  57. 57Saint-DizierGrand Est
    5.2
  58. 57OrléansCentre-Val de Loire
    5.2
  59. 57MontivilliersNormandy
    5.2
  60. 57CherbourgNormandy
    5.2
  61. 57CaenNormandy
    5.2
  62. 57AuxerreBourgogne-Franche-Comté
    5.2
  63. 63BordeauxNew Aquitaine
    5.1
  64. 64ValenceAuvergne-Rhône-Alpes
    5.0
  65. 64MeyzieuAuvergne-Rhône-Alpes
    5.0
  66. 64LormontNew Aquitaine
    5.0
  67. 64ÉvreuxNormandy
    5.0
  68. 64DoleBourgogne-Franche-Comté
    5.0
  69. 64Bourg-en-BresseAuvergne-Rhône-Alpes
    5.0
  70. 64AjaccioCorsica
    5.0
  71. 71Villefranche-sur-SaôneAuvergne-Rhône-Alpes
    4.9
  72. 71Saint-ÉtienneAuvergne-Rhône-Alpes
    4.9
  73. 73PérigueuxNew Aquitaine
    4.8
  74. 73MontbéliardBourgogne-Franche-Comté
    4.8
  75. 73LorientBrittany
    4.8
  76. 73Joué-lès-ToursCentre-Val de Loire
    4.8
  77. 73DomontÎle-de-France
    4.8
  78. 73ChambéryAuvergne-Rhône-Alpes
    4.8
  79. 79VillefontaineAuvergne-Rhône-Alpes
    4.7
  80. 79ÉtampesÎle-de-France
    4.7
  81. 79ArrasHauts-de-France
    4.7
  82. 79AngoulêmeNew Aquitaine
    4.7
  83. 83ToursCentre-Val de Loire
    4.6
  84. 83OlivetCentre-Val de Loire
    4.6
  85. 83AlençonNormandy
    4.6
  86. 86VannesBrittany
    4.5
  87. 86BloisCentre-Val de Loire
    4.5
  88. 88VichyAuvergne-Rhône-Alpes
    4.4
  89. 88RodezOccitanie
    4.4
  90. 88MeylanAuvergne-Rhône-Alpes
    4.4
  91. 88BourgesCentre-Val de Loire
    4.4
  92. 92QuimperBrittany
    4.3
  93. 92ÉpinalGrand Est
    4.3
  94. 92ChâteaurouxCentre-Val de Loire
    4.3
  95. 95MoulinsAuvergne-Rhône-Alpes
    4.2
  96. 96NiortNew Aquitaine
    4.0
  97. 96NeversBourgogne-Franche-Comté
    4.0
  98. 96MontluçonAuvergne-Rhône-Alpes
    4.0
  99. 96LimogesNew Aquitaine
    4.0
  100. 100FontainebleauÎle-de-France
    3.9
  101. 100Clermont-FerrandAuvergne-Rhône-Alpes
    3.9
  102. 102AurillacAuvergne-Rhône-Alpes
    3.3
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

All cities in the world, September 2026 · France now

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SmogRank, most polluted cities in France, PM2.5, September 2026, smogrank.com/fr/history/2026-09 (accessed 1 Oct 2026).

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