SmogRank / World / France / September 2025

Most polluted cities in France, September 2025

95 cities in France ranked by their average PM2.5 over the 30 days. Worst: Amiens at 7.7 µg/m³, #1,220 of 2,711 cities in the world. Cleanest: Aurillac at 3.0. A city needs measurements on 70% of the days to be ranked.

← Amiens 7.7
Every city in France ranked for September 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. 1AmiensHauts-de-France
    7.7
  2. 2RoubaixHauts-de-France
    6.6
  3. 3Boulogne-sur-MerHauts-de-France
    6.2
  4. 4CalaisHauts-de-France
    6.1
  5. 5NiceProvence-Alpes-Côte d'Azur
    6.0
  6. 5Le HavreNormandy
    6.0
  7. 5DunkirkHauts-de-France
    6.0
  8. 8CherbourgNormandy
    5.9
  9. 9RennesBrittany
    5.8
  10. 9ParisÎle-de-France
    5.8
  11. 9NancyGrand Est
    5.8
  12. 9MarseilleProvence-Alpes-Côte d'Azur
    5.8
  13. 9LilleHauts-de-France
    5.8
  14. 9BrestBrittany
    5.8
  15. 15ValenciennesHauts-de-France
    5.7
  16. 15DenainHauts-de-France
    5.7
  17. 17PoitiersNew Aquitaine
    5.6
  18. 17ArlesProvence-Alpes-Côte d'Azur
    5.6
  19. 19StrasbourgGrand Est
    5.5
  20. 20VannesBrittany
    5.4
  21. 20OrléansCentre-Val de Loire
    5.4
  22. 20LunévilleGrand Est
    5.4
  23. 23RouenNormandy
    5.3
  24. 23Mont-de-MarsanNew Aquitaine
    5.3
  25. 23LormontNew Aquitaine
    5.3
  26. 23LorientBrittany
    5.3
  27. 23DouaiHauts-de-France
    5.3
  28. 23CoulommiersÎle-de-France
    5.3
  29. 23BéthuneHauts-de-France
    5.3
  30. 30ToulouseOccitanie
    5.2
  31. 30MulhouseGrand Est
    5.2
  32. 30MarignaneProvence-Alpes-Côte d'Azur
    5.2
  33. 30CannesProvence-Alpes-Côte d'Azur
    5.2
  34. 30Aix-en-ProvenceProvence-Alpes-Côte d'Azur
    5.2
  35. 35Saint-QuentinHauts-de-France
    5.1
  36. 35AlençonNormandy
    5.1
  37. 37QuimperBrittany
    5.0
  38. 37LyonAuvergne-Rhône-Alpes
    5.0
  39. 37BordeauxNew Aquitaine
    5.0
  40. 40PerpignanOccitanie
    4.9
  41. 40NiortNew Aquitaine
    4.9
  42. 40DieppeNormandy
    4.9
  43. 40ChartresCentre-Val de Loire
    4.9
  44. 40CaenNormandy
    4.9
  45. 45Romans-sur-IsèreAuvergne-Rhône-Alpes
    4.8
  46. 45ReimsGrand Est
    4.8
  47. 45RambouilletÎle-de-France
    4.8
  48. 45Joué-lès-ToursCentre-Val de Loire
    4.8
  49. 45ÉvreuxNormandy
    4.8
  50. 50ToursCentre-Val de Loire
    4.7
  51. 50OlivetCentre-Val de Loire
    4.7
  52. 50MeyzieuAuvergne-Rhône-Alpes
    4.7
  53. 50GrenobleAuvergne-Rhône-Alpes
    4.7
  54. 50ÉpinalGrand Est
    4.7
  55. 50BloisCentre-Val de Loire
    4.7
  56. 50AngoulêmeNew Aquitaine
    4.7
  57. 57Villefranche-sur-SaôneAuvergne-Rhône-Alpes
    4.6
  58. 57Saint-DizierGrand Est
    4.6
  59. 57LourdesOccitanie
    4.6
  60. 57LimogesNew Aquitaine
    4.6
  61. 57ChâteaurouxCentre-Val de Loire
    4.6
  62. 57AvignonProvence-Alpes-Côte d'Azur
    4.6
  63. 63ValenceAuvergne-Rhône-Alpes
    4.4
  64. 63TarbesOccitanie
    4.4
  65. 63Saint-ÉtienneAuvergne-Rhône-Alpes
    4.4
  66. 63Saint-AvoldGrand Est
    4.4
  67. 63NeversBourgogne-Franche-Comté
    4.4
  68. 63DreuxCentre-Val de Loire
    4.4
  69. 63BourgesCentre-Val de Loire
    4.4
  70. 63AnnemasseAuvergne-Rhône-Alpes
    4.4
  71. 71MontargisCentre-Val de Loire
    4.3
  72. 71LouviersNormandy
    4.3
  73. 71ChambéryAuvergne-Rhône-Alpes
    4.3
  74. 71BastiaCorsica
    4.3
  75. 71AlbertvilleAuvergne-Rhône-Alpes
    4.3
  76. 76PérigueuxNew Aquitaine
    4.2
  77. 76NîmesOccitanie
    4.2
  78. 76MontluçonAuvergne-Rhône-Alpes
    4.2
  79. 76ÉtampesÎle-de-France
    4.2
  80. 80VillefontaineAuvergne-Rhône-Alpes
    4.1
  81. 80ThionvilleGrand Est
    4.1
  82. 80Salon-de-ProvenceProvence-Alpes-Côte d'Azur
    4.1
  83. 80MoulinsAuvergne-Rhône-Alpes
    4.1
  84. 80MontbéliardBourgogne-Franche-Comté
    4.1
  85. 80CastresOccitanie
    4.1
  86. 80AuxerreBourgogne-Franche-Comté
    4.1
  87. 87RodezOccitanie
    4.0
  88. 87MontaubanOccitanie
    4.0
  89. 87DomontÎle-de-France
    4.0
  90. 87Clermont-FerrandAuvergne-Rhône-Alpes
    4.0
  91. 91MeylanAuvergne-Rhône-Alpes
    3.9
  92. 92FontainebleauÎle-de-France
    3.8
  93. 92Bourg-en-BresseAuvergne-Rhône-Alpes
    3.8
  94. 94VichyAuvergne-Rhône-Alpes
    3.4
  95. 95AurillacAuvergne-Rhône-Alpes
    3.0
Good0–5
Fair6–15
Moderate16–50
Poor51–90
Very poor91–140
Extremely poor141+

The European Environment Agency's air quality index bands for PM2.5 (2024 revision); it has bands, not numbers, so values stay in µg/m³. 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, September 2025 · France now

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SmogRank, most polluted cities in France, PM2.5, September 2025, smogrank.com/fr/history/2025-09 (accessed 2 Oct 2026).

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