SmogRank / Countries / Canada / March 2026

Most polluted cities in Canada, March 2026

94 cities in Canada ranked by their average PM2.5 over the 31 days. Worst: Toronto at 8.8 µg/m³, #1,484 of 2,332 cities in the world. Cleanest: Yellowknife at 2.1. A city needs measurements on 70% of the days to be ranked.

  1. 1TorontoOntario
    8.8
  2. 2CalgaryAlberta
    8.2
  3. 3LondonOntario
    8.0
  4. 4HamiltonOntario
    7.8
  5. 4Nepeanlow-cost sensorsOntario
    7.8
  6. 4NewmarketOntario
    7.8
  7. 7MiltonOntario
    7.7
  8. 8EdmontonAlberta
    7.5
  9. 9BrantfordOntario
    7.4
  10. 9SarniaOntario
    7.4
  11. 9WindsorOntario
    7.4
  12. 9L'Ancienne-LoretteQuebec
    7.4
  13. 13KitchenerOntario
    7.3
  14. 14OakvilleOntario
    7.2
  15. 14WaterdownOntario
    7.2
  16. 16MississaugaOntario
    7.1
  17. 17BarrieOntario
    7.0
  18. 17BramptonOntario
    7.0
  19. 19Red DeerAlberta
    6.9
  20. 20GuelphOntario
    6.8
  21. 21St. CatharinesOntario
    6.7
  22. 22WhitehorseYukon
    6.6
  23. 23AllistonOntario
    6.5
  24. 24ChathamOntario
    6.4
  25. 24ReginaSaskatchewan
    6.4
  26. 26St. ThomasOntario
    6.3
  27. 27Port AlberniBritish Columbia
    6.1
  28. 28MontréalQuebec
    6.0
  29. 29KingstonOntario
    5.9
  30. 29OttawaOntario
    5.9
  31. 31ShawiniganQuebec
    5.8
  32. 32CornwallOntario
    5.7
  33. 32Medicine HatAlberta
    5.7
  34. 32PeterboroughOntario
    5.7
  35. 32VernonBritish Columbia
    5.7
  36. 36BellevilleOntario
    5.6
  37. 36BrossardQuebec
    5.6
  38. 36Prince AlbertSaskatchewan
    5.6
  39. 36Sorel-TracyQuebec
    5.6
  40. 36Rivière-des-Prairies–Pointe-aux-TremblesQuebec
    5.6
  41. 41Sherwood ParkAlberta
    5.5
  42. 41QuébecQuebec
    5.5
  43. 43AirdrieAlberta
    5.3
  44. 44SaskatoonSaskatchewan
    5.2
  45. 45GranbyQuebec
    5.1
  46. 45St. AlbertAlberta
    5.1
  47. 47Gatineaulow-cost sensorsQuebec
    5.0
  48. 47SherbrookeQuebec
    5.0
  49. 47Trois-RivièresQuebec
    5.0
  50. 50DrummondvilleQuebec
    4.9
  51. 50LethbridgeAlberta
    4.9
  52. 50EdmundstonNew Brunswick
    4.9
  53. 53KamloopsBritish Columbia
    4.8
  54. 54Fort McMurrayAlberta
    4.7
  55. 55Fort St. JohnBritish Columbia
    4.6
  56. 55Saint JohnNew Brunswick
    4.6
  57. 57SaguenayQuebec
    4.3
  58. 57Swift CurrentSaskatchewan
    4.3
  59. 59North BayOntario
    4.2
  60. 59Saint-Jean-sur-RichelieuQuebec
    4.2
  61. 59TerraceBritish Columbia
    4.2
  62. 62MonctonNew Brunswick
    4.1
  63. 62Prince GeorgeBritish Columbia
    4.1
  64. 64Grande PrairieAlberta
    4.0
  65. 64Greater SudburyOntario
    4.0
  66. 64Sault Ste. MarieOntario
    4.0
  67. 64HarewoodBritish Columbia
    4.0
  68. 68SydneyNova Scotia
    3.9
  69. 69Sept-ÎlesQuebec
    3.8
  70. 70ChilliwackBritish Columbia
    3.7
  71. 70FrederictonNew Brunswick
    3.7
  72. 70KelownaBritish Columbia
    3.7
  73. 70VictoriaBritish Columbia
    3.7
  74. 74Winnipeglow-cost sensorsManitoba
    3.6
  75. 75Rouyn-NorandaQuebec
    3.5
  76. 76MiramichiNew Brunswick
    3.4
  77. 76RichmondBritish Columbia
    3.4
  78. 76VancouverBritish Columbia
    3.4
  79. 79AbbotsfordBritish Columbia
    3.3
  80. 80Campbell RiverBritish Columbia
    3.2
  81. 80CharlottetownPrince Edward Island
    3.2
  82. 80LangleyBritish Columbia
    3.2
  83. 83BurnabyBritish Columbia
    3.1
  84. 83Strawberry HillBritish Columbia
    3.1
  85. 85CoquitlamBritish Columbia
    3.0
  86. 85SquamishBritish Columbia
    3.0
  87. 87NanaimoBritish Columbia
    2.9
  88. 88DartmouthNova Scotia
    2.8
  89. 89DeltaBritish Columbia
    2.7
  90. 90North CowichanBritish Columbia
    2.6
  91. 90Port CoquitlamBritish Columbia
    2.6
  92. 92North VancouverBritish Columbia
    2.3
  93. 92West VancouverBritish Columbia
    2.3
  94. 94Yellowknifelow-cost sensorsNorthwest Territories
    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 2026 · Canada now