SmogRank / Countries / Canada / December 2025

Most polluted cities in Canada, December 2025

97 cities in Canada ranked by their average PM2.5 over the 31 days. Worst: Windsor at 13.3 µg/m³, #530 of 2,360 cities in the world. Cleanest: West Vancouver at 2.5. A city needs measurements on 70% of the days to be ranked.

  1. 1WindsorOntario
    13.3
  2. 2CalgaryAlberta
    11.3
  3. 3EdmontonAlberta
    11.2
  4. 4Nepeanlow-cost sensorsOntario
    8.5
  5. 4Red DeerAlberta
    8.5
  6. 6Sorel-TracyQuebec
    8.3
  7. 6L'Ancienne-LoretteQuebec
    8.3
  8. 8ReginaSaskatchewan
    8.1
  9. 9DrummondvilleQuebec
    8.0
  10. 10Gatineaulow-cost sensorsQuebec
    7.9
  11. 11St. AlbertAlberta
    7.8
  12. 12CranbrookBritish Columbia
    7.6
  13. 13TorontoOntario
    7.5
  14. 14QuébecQuebec
    7.4
  15. 15LondonOntario
    7.3
  16. 15Port AlberniBritish Columbia
    7.3
  17. 15Sherwood ParkAlberta
    7.3
  18. 18KamloopsBritish Columbia
    7.1
  19. 18MiltonOntario
    7.1
  20. 18SarniaOntario
    7.1
  21. 21ChathamOntario
    6.9
  22. 22BrantfordOntario
    6.8
  23. 23DuncanBritish Columbia
    6.7
  24. 24MississaugaOntario
    6.6
  25. 24WaterdownOntario
    6.6
  26. 26GuelphOntario
    6.5
  27. 26HamiltonOntario
    6.5
  28. 26KitchenerOntario
    6.5
  29. 26VernonBritish Columbia
    6.5
  30. 30AirdrieAlberta
    6.4
  31. 31NewmarketOntario
    6.3
  32. 31OakvilleOntario
    6.3
  33. 31OttawaOntario
    6.3
  34. 31ShawiniganQuebec
    6.3
  35. 31Rivière-des-Prairies–Pointe-aux-TremblesQuebec
    6.3
  36. 36GranbyQuebec
    6.2
  37. 36MontréalQuebec
    6.2
  38. 38BrossardQuebec
    6.1
  39. 39LethbridgeAlberta
    6.0
  40. 39Trois-RivièresQuebec
    6.0
  41. 41BramptonOntario
    5.8
  42. 41Medicine HatAlberta
    5.8
  43. 41St. ThomasOntario
    5.8
  44. 44DorvalQuebec
    5.7
  45. 44St. CatharinesOntario
    5.7
  46. 46Campbell RiverBritish Columbia
    5.5
  47. 47KelownaBritish Columbia
    5.4
  48. 47Prince GeorgeBritish Columbia
    5.4
  49. 49BarrieOntario
    5.3
  50. 49SaskatoonSaskatchewan
    5.3
  51. 49Swift CurrentSaskatchewan
    5.3
  52. 52AllistonOntario
    5.2
  53. 52CornwallOntario
    5.2
  54. 54BellevilleOntario
    5.1
  55. 54PeterboroughOntario
    5.1
  56. 56KingstonOntario
    5.0
  57. 57SherbrookeQuebec
    4.9
  58. 57TerraceBritish Columbia
    4.9
  59. 57EdmundstonNew Brunswick
    4.9
  60. 60VictoriaBritish Columbia
    4.7
  61. 61Prince AlbertSaskatchewan
    4.6
  62. 61VancouverBritish Columbia
    4.6
  63. 63LangfordBritish Columbia
    4.5
  64. 63RichmondBritish Columbia
    4.5
  65. 65Saint-Jean-sur-RichelieuQuebec
    4.4
  66. 66Fort McMurrayAlberta
    4.3
  67. 66SaguenayQuebec
    4.3
  68. 68BurnabyBritish Columbia
    4.1
  69. 69Fort St. JohnBritish Columbia
    4.0
  70. 69Strawberry HillBritish Columbia
    4.0
  71. 69HarewoodBritish Columbia
    4.0
  72. 72MonctonNew Brunswick
    3.9
  73. 72NanaimoBritish Columbia
    3.9
  74. 72Sault Ste. MarieOntario
    3.9
  75. 75Saint JohnNew Brunswick
    3.8
  76. 76Greater SudburyOntario
    3.7
  77. 76LangleyBritish Columbia
    3.7
  78. 76SydneyNova Scotia
    3.7
  79. 79CoquitlamBritish Columbia
    3.6
  80. 79DeltaBritish Columbia
    3.6
  81. 81AbbotsfordBritish Columbia
    3.5
  82. 81North BayOntario
    3.5
  83. 83FrederictonNew Brunswick
    3.4
  84. 83MissionBritish Columbia
    3.4
  85. 85ChilliwackBritish Columbia
    3.3
  86. 85Rouyn-NorandaQuebec
    3.3
  87. 85Winnipeglow-cost sensorsManitoba
    3.3
  88. 88North VancouverBritish Columbia
    3.2
  89. 89CharlottetownPrince Edward Island
    3.1
  90. 89DartmouthNova Scotia
    3.1
  91. 91Port CoquitlamBritish Columbia
    3.0
  92. 91Sept-ÎlesQuebec
    3.0
  93. 91SquamishBritish Columbia
    3.0
  94. 94MiramichiNew Brunswick
    2.8
  95. 94North CowichanBritish Columbia
    2.8
  96. 96Yellowknifelow-cost sensorsNorthwest Territories
    2.6
  97. 97West VancouverBritish Columbia
    2.5
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, December 2025 · Canada now