SmogRank / Countries / Canada / March 2025

Most polluted cities in Canada, March 2025

94 cities in Canada ranked by their average PM2.5 over the 31 days. Worst: Edmonton at 9.0 µg/m³, #1,345 of 2,218 cities in the world. Cleanest: West Vancouver at 2.1. A city needs measurements on 70% of the days to be ranked.

  1. 1EdmontonAlberta
    9.0
  2. 2Nepeanlow-cost sensorsOntario
    8.0
  3. 3Sorel-TracyQuebec
    7.6
  4. 4WindsorOntario
    7.1
  5. 5CalgaryAlberta
    7.0
  6. 5L'Ancienne-LoretteQuebec
    7.0
  7. 7Gatineaulow-cost sensorsQuebec
    6.9
  8. 7MontréalQuebec
    6.9
  9. 7Rivière-des-Prairies–Pointe-aux-TremblesQuebec
    6.9
  10. 10Sherwood ParkAlberta
    6.7
  11. 11Red DeerAlberta
    6.6
  12. 12ReginaSaskatchewan
    6.5
  13. 12Trois-RivièresQuebec
    6.5
  14. 14DorvalQuebec
    6.4
  15. 14TorontoOntario
    6.4
  16. 16OttawaOntario
    6.3
  17. 17VernonBritish Columbia
    6.2
  18. 18HamiltonOntario
    6.1
  19. 18SaskatoonSaskatchewan
    6.1
  20. 18WhitehorseYukon
    6.1
  21. 21BrantfordOntario
    6.0
  22. 21St. AlbertAlberta
    6.0
  23. 23LondonOntario
    5.8
  24. 23MiltonOntario
    5.8
  25. 25KitchenerOntario
    5.7
  26. 26BarrieOntario
    5.6
  27. 26SaguenayQuebec
    5.6
  28. 26St. ThomasOntario
    5.6
  29. 29BramptonOntario
    5.5
  30. 29BrossardQuebec
    5.5
  31. 29ShawiniganQuebec
    5.5
  32. 32NewmarketOntario
    5.4
  33. 32SarniaOntario
    5.4
  34. 34GranbyQuebec
    5.3
  35. 34OakvilleOntario
    5.3
  36. 36St. CatharinesOntario
    5.2
  37. 36Swift CurrentSaskatchewan
    5.2
  38. 36WaterdownOntario
    5.2
  39. 36QuébecQuebec
    5.2
  40. 40ChathamOntario
    5.1
  41. 40GuelphOntario
    5.1
  42. 40Medicine HatAlberta
    5.1
  43. 40SherbrookeQuebec
    5.1
  44. 44DrummondvilleQuebec
    5.0
  45. 44Grande PrairieAlberta
    5.0
  46. 44KamloopsBritish Columbia
    5.0
  47. 44PeterboroughOntario
    5.0
  48. 44Prince AlbertSaskatchewan
    5.0
  49. 49MississaugaOntario
    4.9
  50. 49Port AlberniBritish Columbia
    4.9
  51. 51CranbrookBritish Columbia
    4.8
  52. 51EdmundstonNew Brunswick
    4.8
  53. 53AllistonOntario
    4.7
  54. 53TerraceBritish Columbia
    4.7
  55. 55Fort McMurrayAlberta
    4.6
  56. 56BellevilleOntario
    4.5
  57. 56KelownaBritish Columbia
    4.5
  58. 56KingstonOntario
    4.5
  59. 59AirdrieAlberta
    4.4
  60. 60Fort St. JohnBritish Columbia
    4.2
  61. 60Greater SudburyOntario
    4.2
  62. 60North BayOntario
    4.2
  63. 60VictoriaBritish Columbia
    4.2
  64. 64LethbridgeAlberta
    4.1
  65. 64Saint-Jean-sur-RichelieuQuebec
    4.1
  66. 64Saint JohnNew Brunswick
    4.1
  67. 67Sault Ste. MarieOntario
    4.0
  68. 67HarewoodBritish Columbia
    4.0
  69. 69LangfordBritish Columbia
    3.9
  70. 69Rouyn-NorandaQuebec
    3.9
  71. 71SydneyNova Scotia
    3.7
  72. 72FrederictonNew Brunswick
    3.6
  73. 72MissionBritish Columbia
    3.6
  74. 72VancouverBritish Columbia
    3.6
  75. 75MiramichiNew Brunswick
    3.4
  76. 75MonctonNew Brunswick
    3.4
  77. 77DuncanBritish Columbia
    3.3
  78. 78AbbotsfordBritish Columbia
    3.2
  79. 79BurnabyBritish Columbia
    3.1
  80. 79CharlottetownPrince Edward Island
    3.1
  81. 79ChilliwackBritish Columbia
    3.1
  82. 79LangleyBritish Columbia
    3.1
  83. 79RichmondBritish Columbia
    3.1
  84. 79SquamishBritish Columbia
    3.1
  85. 79Strawberry HillBritish Columbia
    3.1
  86. 86CoquitlamBritish Columbia
    3.0
  87. 86DartmouthNova Scotia
    3.0
  88. 88DeltaBritish Columbia
    2.8
  89. 88North CowichanBritish Columbia
    2.8
  90. 90Campbell RiverBritish Columbia
    2.7
  91. 91NanaimoBritish Columbia
    2.6
  92. 92North VancouverBritish Columbia
    2.4
  93. 92Port CoquitlamBritish Columbia
    2.4
  94. 94West VancouverBritish Columbia
    2.1
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, March 2025 · Canada now