SmogRank / Countries / Canada / October 2023

Most polluted cities in Canada, October 2023

97 cities in Canada ranked by their average PM2.5 over the 31 days. Worst: Duncan at 9.0 µg/m³, #387 of 1,686 cities in the world. Cleanest: Corner Brook at 3.7. A city needs measurements on 70% of the days to be ranked.

  1. 1DuncanBritish Columbia
    9.0
  2. 1ReginaSaskatchewan
    9.0
  3. 3EdmontonAlberta
    8.8
  4. 4CranbrookBritish Columbia
    8.5
  5. 5TerraceBritish Columbia
    8.4
  6. 6Port AlberniBritish Columbia
    8.2
  7. 7WindsorOntario
    7.9
  8. 8Grande PrairieAlberta
    7.8
  9. 8L'Ancienne-LoretteQuebec
    7.8
  10. 10LondonOntario
    7.7
  11. 11VernonBritish Columbia
    7.6
  12. 12Prince GeorgeBritish Columbia
    7.5
  13. 13CourtenayBritish Columbia
    7.4
  14. 14SarniaOntario
    7.2
  15. 14Trois-RivièresQuebec
    7.2
  16. 16BrantfordOntario
    7.1
  17. 16LangfordBritish Columbia
    7.1
  18. 16TorontoOntario
    7.1
  19. 16QuébecQuebec
    7.1
  20. 20KamloopsBritish Columbia
    7.0
  21. 20OakvilleOntario
    7.0
  22. 22Fort St. JohnBritish Columbia
    6.9
  23. 22KitchenerOntario
    6.9
  24. 24Fort McMurrayAlberta
    6.8
  25. 24GranbyQuebec
    6.8
  26. 24MiltonOntario
    6.8
  27. 24Rivière-des-Prairies–Pointe-aux-TremblesQuebec
    6.8
  28. 28BarrieOntario
    6.7
  29. 28CalgaryAlberta
    6.7
  30. 28GuelphOntario
    6.7
  31. 28MississaugaOntario
    6.7
  32. 28Red DeerAlberta
    6.7
  33. 28WaterdownOntario
    6.7
  34. 28HarewoodBritish Columbia
    6.7
  35. 35ChathamOntario
    6.6
  36. 35HamiltonOntario
    6.6
  37. 35MontréalQuebec
    6.6
  38. 35St. John'sNewfoundland and Labrador
    6.6
  39. 35EdmundstonNew Brunswick
    6.6
  40. 40NewmarketOntario
    6.5
  41. 40OttawaOntario
    6.5
  42. 40SaguenayQuebec
    6.5
  43. 40St. AlbertAlberta
    6.5
  44. 40St. ThomasOntario
    6.5
  45. 45SaskatoonSaskatchewan
    6.4
  46. 45SquamishBritish Columbia
    6.4
  47. 45VictoriaBritish Columbia
    6.4
  48. 48BramptonOntario
    6.2
  49. 48MonctonNew Brunswick
    6.2
  50. 50DrummondvilleQuebec
    6.1
  51. 51Prince AlbertSaskatchewan
    6.0
  52. 51Saint JohnNew Brunswick
    6.0
  53. 51SherbrookeQuebec
    6.0
  54. 54CornwallOntario
    5.9
  55. 55PeterboroughOntario
    5.8
  56. 55Saint-Jean-sur-RichelieuQuebec
    5.8
  57. 57DorvalQuebec
    5.7
  58. 57KelownaBritish Columbia
    5.7
  59. 57PentictonBritish Columbia
    5.7
  60. 57Swift CurrentSaskatchewan
    5.7
  61. 57VancouverBritish Columbia
    5.7
  62. 62Sherwood ParkAlberta
    5.6
  63. 62St. CatharinesOntario
    5.6
  64. 64AbbotsfordBritish Columbia
    5.5
  65. 64BrooklinOntario
    5.5
  66. 66BrossardQuebec
    5.4
  67. 66KingstonOntario
    5.4
  68. 66LangleyBritish Columbia
    5.4
  69. 66ShawiniganQuebec
    5.4
  70. 66Strawberry HillBritish Columbia
    5.4
  71. 71ChilliwackBritish Columbia
    5.3
  72. 71North CowichanBritish Columbia
    5.3
  73. 73North BayOntario
    5.2
  74. 74Campbell RiverBritish Columbia
    5.1
  75. 74FrederictonNew Brunswick
    5.1
  76. 74MiramichiNew Brunswick
    5.1
  77. 74RichmondBritish Columbia
    5.1
  78. 78BellevilleOntario
    5.0
  79. 78West VancouverBritish Columbia
    5.0
  80. 80BurnabyBritish Columbia
    4.9
  81. 81AirdrieAlberta
    4.8
  82. 81CoquitlamBritish Columbia
    4.8
  83. 81Greater SudburyOntario
    4.8
  84. 84Mount PearlNewfoundland and Labrador
    4.7
  85. 85DeltaBritish Columbia
    4.6
  86. 85Medicine HatAlberta
    4.6
  87. 87BrandonManitoba
    4.5
  88. 87North VancouverBritish Columbia
    4.5
  89. 89CharlottetownPrince Edward Island
    4.4
  90. 89NanaimoBritish Columbia
    4.4
  91. 89Port CoquitlamBritish Columbia
    4.4
  92. 92Rouyn-NorandaQuebec
    4.3
  93. 92WhitehorseYukon
    4.3
  94. 94Sault Ste. MarieOntario
    4.2
  95. 95LethbridgeAlberta
    4.1
  96. 96Thunder BayOntario
    4.0
  97. 97Corner BrookNewfoundland and Labrador
    3.7
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, October 2023 · Canada now

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SmogRank, most polluted cities in Canada, PM2.5, October 2023, smogrank.com/ca/history/2023-10 (accessed 2 Oct 2026).

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