SmogRank / Countries / Canada / July 2025

Most polluted cities in Canada, July 2025

93 cities in Canada ranked by their average PM2.5 over the 31 days. Worst: Prince Albert at 46.1 µg/m³, #13 of 2,283 cities in the world. Cleanest: Campbell River at 1.9. A city needs measurements on 70% of the days to be ranked.

  1. 1Prince AlbertSaskatchewan
    46.1
  2. 2SaskatoonSaskatchewan
    28.8
  3. 3ReginaSaskatchewan
    24.0
  4. 4Nepeanlow-cost sensorsOntario
    22.3
  5. 5Fort McMurrayAlberta
    20.1
  6. 6Swift CurrentSaskatchewan
    19.5
  7. 7L'Ancienne-LoretteQuebec
    17.7
  8. 8Sorel-TracyQuebec
    17.6
  9. 9Sault Ste. MarieOntario
    17.0
  10. 10ShawiniganQuebec
    16.9
  11. 11GranbyQuebec
    16.6
  12. 12DorvalQuebec
    16.5
  13. 12WindsorOntario
    16.5
  14. 14MontréalQuebec
    16.4
  15. 14QuébecQuebec
    16.4
  16. 16Greater SudburyOntario
    16.2
  17. 17Trois-RivièresQuebec
    16.1
  18. 18Rouyn-NorandaQuebec
    15.9
  19. 19TorontoOntario
    15.6
  20. 20NewmarketOntario
    15.3
  21. 21BarrieOntario
    14.9
  22. 21EdmontonAlberta
    14.9
  23. 23Rivière-des-Prairies–Pointe-aux-TremblesQuebec
    14.8
  24. 24BrossardQuebec
    14.7
  25. 24MiltonOntario
    14.7
  26. 26North BayOntario
    14.6
  27. 27OakvilleOntario
    14.5
  28. 28DrummondvilleQuebec
    14.1
  29. 29SaguenayQuebec
    13.7
  30. 30CornwallOntario
    13.5
  31. 30SarniaOntario
    13.5
  32. 30SherbrookeQuebec
    13.5
  33. 33BramptonOntario
    13.4
  34. 34OttawaOntario
    13.1
  35. 35WaterdownOntario
    13.0
  36. 36Medicine HatAlberta
    12.9
  37. 36MississaugaOntario
    12.9
  38. 38AllistonOntario
    12.7
  39. 38KitchenerOntario
    12.7
  40. 38PeterboroughOntario
    12.7
  41. 41BrantfordOntario
    12.5
  42. 41LondonOntario
    12.5
  43. 43GuelphOntario
    12.4
  44. 44BellevilleOntario
    12.3
  45. 44Saint-Jean-sur-RichelieuQuebec
    12.3
  46. 46HamiltonOntario
    12.1
  47. 47EdmundstonNew Brunswick
    11.9
  48. 48KingstonOntario
    11.6
  49. 49Sherwood ParkAlberta
    11.5
  50. 49St. CatharinesOntario
    11.5
  51. 51St. AlbertAlberta
    10.4
  52. 52ChathamOntario
    10.2
  53. 52Sept-ÎlesQuebec
    10.2
  54. 54CalgaryAlberta
    9.8
  55. 54LethbridgeAlberta
    9.8
  56. 54St. ThomasOntario
    9.8
  57. 57MiramichiNew Brunswick
    9.6
  58. 58Red DeerAlberta
    8.7
  59. 59FrederictonNew Brunswick
    7.8
  60. 60Prince GeorgeBritish Columbia
    7.4
  61. 61Grande PrairieAlberta
    7.2
  62. 62CharlottetownPrince Edward Island
    7.1
  63. 62MonctonNew Brunswick
    7.1
  64. 64Saint JohnNew Brunswick
    6.9
  65. 65AirdrieAlberta
    6.6
  66. 66SydneyNova Scotia
    6.5
  67. 67Fort St. JohnBritish Columbia
    6.1
  68. 67SquamishBritish Columbia
    6.1
  69. 69DartmouthNova Scotia
    5.7
  70. 70ChilliwackBritish Columbia
    5.5
  71. 70CoquitlamBritish Columbia
    5.5
  72. 72NanaimoBritish Columbia
    5.1
  73. 72VernonBritish Columbia
    5.1
  74. 74AbbotsfordBritish Columbia
    5.0
  75. 74Port CoquitlamBritish Columbia
    5.0
  76. 76BurnabyBritish Columbia
    4.9
  77. 76MissionBritish Columbia
    4.9
  78. 76VancouverBritish Columbia
    4.9
  79. 79VictoriaBritish Columbia
    4.8
  80. 80CranbrookBritish Columbia
    4.7
  81. 81DuncanBritish Columbia
    4.5
  82. 82LangleyBritish Columbia
    4.4
  83. 82RichmondBritish Columbia
    4.4
  84. 82TerraceBritish Columbia
    4.4
  85. 82West VancouverBritish Columbia
    4.4
  86. 86Strawberry HillBritish Columbia
    4.3
  87. 87HarewoodBritish Columbia
    4.2
  88. 88KelownaBritish Columbia
    4.1
  89. 89DeltaBritish Columbia
    3.9
  90. 89North CowichanBritish Columbia
    3.9
  91. 91North VancouverBritish Columbia
    3.7
  92. 92LangfordBritish Columbia
    3.6
  93. 93Campbell RiverBritish Columbia
    1.9
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, July 2025 · Canada now