SmogRank / Countries / Canada / May 2025

Most polluted cities in Canada, May 2025

92 cities in Canada ranked by their average PM2.5 over the 31 days. Worst: Fort McMurray at 19.9 µg/m³, #176 of 2,193 cities in the world. Cleanest: Campbell River at 1.7. A city needs measurements on 70% of the days to be ranked.

  1. 1Fort McMurrayAlberta
    19.9
  2. 2Prince AlbertSaskatchewan
    16.6
  3. 3ReginaSaskatchewan
    14.0
  4. 4SaskatoonSaskatchewan
    13.4
  5. 5St. AlbertAlberta
    11.8
  6. 6EdmontonAlberta
    9.1
  7. 7CalgaryAlberta
    6.5
  8. 8Red DeerAlberta
    6.4
  9. 8Swift CurrentSaskatchewan
    6.4
  10. 10HamiltonOntario
    6.2
  11. 11WindsorOntario
    6.0
  12. 12Medicine HatAlberta
    5.9
  13. 13BrantfordOntario
    5.7
  14. 14Sherwood ParkAlberta
    5.6
  15. 15SaguenayQuebec
    5.5
  16. 16Prince GeorgeBritish Columbia
    5.2
  17. 17St. ThomasOntario
    5.1
  18. 18AbbotsfordBritish Columbia
    4.9
  19. 18AirdrieAlberta
    4.9
  20. 18LondonOntario
    4.9
  21. 18MontréalQuebec
    4.9
  22. 18TorontoOntario
    4.9
  23. 23Fort St. JohnBritish Columbia
    4.8
  24. 23KitchenerOntario
    4.8
  25. 23MiltonOntario
    4.8
  26. 26BarrieOntario
    4.7
  27. 26Grande PrairieAlberta
    4.7
  28. 26Nepeanlow-cost sensorsOntario
    4.7
  29. 26Trois-RivièresQuebec
    4.7
  30. 30ChilliwackBritish Columbia
    4.6
  31. 30OakvilleOntario
    4.6
  32. 30Sorel-TracyQuebec
    4.6
  33. 30VernonBritish Columbia
    4.6
  34. 30L'Ancienne-LoretteQuebec
    4.6
  35. 35BramptonOntario
    4.5
  36. 35GuelphOntario
    4.5
  37. 35KamloopsBritish Columbia
    4.5
  38. 35VictoriaBritish Columbia
    4.5
  39. 39DorvalQuebec
    4.4
  40. 39MissionBritish Columbia
    4.4
  41. 39WaterdownOntario
    4.4
  42. 39Rivière-des-Prairies–Pointe-aux-TremblesQuebec
    4.4
  43. 43LethbridgeAlberta
    4.3
  44. 43NewmarketOntario
    4.3
  45. 43SarniaOntario
    4.3
  46. 43SquamishBritish Columbia
    4.3
  47. 43St. CatharinesOntario
    4.3
  48. 43EdmundstonNew Brunswick
    4.3
  49. 49CranbrookBritish Columbia
    4.2
  50. 49LangleyBritish Columbia
    4.2
  51. 49MississaugaOntario
    4.2
  52. 49VancouverBritish Columbia
    4.2
  53. 53BrossardQuebec
    4.1
  54. 53BurnabyBritish Columbia
    4.1
  55. 53CornwallOntario
    4.1
  56. 53GranbyQuebec
    4.1
  57. 53ShawiniganQuebec
    4.1
  58. 53QuébecQuebec
    4.1
  59. 59ChathamOntario
    4.0
  60. 59Greater SudburyOntario
    4.0
  61. 59KelownaBritish Columbia
    4.0
  62. 59RichmondBritish Columbia
    4.0
  63. 59Sept-ÎlesQuebec
    4.0
  64. 59Strawberry HillBritish Columbia
    4.0
  65. 65DrummondvilleQuebec
    3.9
  66. 65LangfordBritish Columbia
    3.9
  67. 65Port AlberniBritish Columbia
    3.9
  68. 65HarewoodBritish Columbia
    3.9
  69. 69CoquitlamBritish Columbia
    3.8
  70. 69OttawaOntario
    3.8
  71. 71BellevilleOntario
    3.7
  72. 71KingstonOntario
    3.7
  73. 71Port CoquitlamBritish Columbia
    3.7
  74. 71SydneyNova Scotia
    3.7
  75. 75DeltaBritish Columbia
    3.6
  76. 75DuncanBritish Columbia
    3.6
  77. 75SherbrookeQuebec
    3.6
  78. 78Rouyn-NorandaQuebec
    3.5
  79. 78Sault Ste. MarieOntario
    3.5
  80. 80AllistonOntario
    3.4
  81. 80TerraceBritish Columbia
    3.4
  82. 82CharlottetownPrince Edward Island
    3.3
  83. 82North BayOntario
    3.3
  84. 82PeterboroughOntario
    3.3
  85. 85NanaimoBritish Columbia
    3.2
  86. 85West VancouverBritish Columbia
    3.2
  87. 87DartmouthNova Scotia
    3.1
  88. 87North VancouverBritish Columbia
    3.1
  89. 87Saint-Jean-sur-RichelieuQuebec
    3.1
  90. 90WhitehorseYukon
    2.2
  91. 91North CowichanBritish Columbia
    2.0
  92. 92Campbell RiverBritish Columbia
    1.7
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, May 2025 · Canada now