SmogRank / Countries / Canada / July 2026

Most polluted cities in Canada, July 2026

96 cities in Canada ranked by their average PM2.5 over the 31 days. Worst: Yellowknife at 37.2 µg/m³, #47 of 2,262 cities in the world. Cleanest: Campbell River at 2.9. A city needs measurements on 70% of the days to be ranked.

  1. 1Yellowknifelow-cost sensorsNorthwest Territories
    37.2
  2. 2KamloopsBritish Columbia
    34.1
  3. 3WindsorOntario
    33.8
  4. 4SarniaOntario
    32.5
  5. 5St. ThomasOntario
    30.5
  6. 6LondonOntario
    29.4
  7. 7Sault Ste. MarieOntario
    28.9
  8. 8BrantfordOntario
    27.0
  9. 9KitchenerOntario
    26.5
  10. 10ChathamOntario
    25.5
  11. 11GuelphOntario
    24.4
  12. 12MiltonOntario
    24.2
  13. 13HamiltonOntario
    23.9
  14. 14WaterdownOntario
    23.5
  15. 15NewmarketOntario
    21.2
  16. 16OakvilleOntario
    21.1
  17. 17BramptonOntario
    20.4
  18. 18BarrieOntario
    19.8
  19. 19TorontoOntario
    19.5
  20. 20CalgaryAlberta
    19.3
  21. 21Nepeanlow-cost sensorsOntario
    19.2
  22. 21Winnipeglow-cost sensorsManitoba
    19.2
  23. 23AllistonOntario
    18.7
  24. 24MississaugaOntario
    18.3
  25. 24Red DeerAlberta
    18.3
  26. 26St. CatharinesOntario
    18.0
  27. 27AirdrieAlberta
    16.9
  28. 28Fort McMurrayAlberta
    16.4
  29. 29EdmontonAlberta
    16.3
  30. 30Greater SudburyOntario
    15.5
  31. 31Swift CurrentSaskatchewan
    15.2
  32. 32VernonBritish Columbia
    15.0
  33. 33BellevilleOntario
    14.7
  34. 34Grande PrairieAlberta
    14.6
  35. 34Medicine HatAlberta
    14.6
  36. 36Sherwood ParkAlberta
    14.5
  37. 37CranbrookBritish Columbia
    13.7
  38. 37PeterboroughOntario
    13.7
  39. 39LethbridgeAlberta
    13.6
  40. 40Prince AlbertSaskatchewan
    13.5
  41. 41North BayOntario
    13.3
  42. 42Gatineaulow-cost sensorsQuebec
    13.2
  43. 42St. AlbertAlberta
    13.2
  44. 44KingstonOntario
    12.6
  45. 44L'Ancienne-LoretteQuebec
    12.6
  46. 46Sorel-TracyQuebec
    12.4
  47. 47SaskatoonSaskatchewan
    11.9
  48. 48Fort St. JohnBritish Columbia
    11.6
  49. 49ShawiniganQuebec
    11.4
  50. 50CornwallOntario
    11.1
  51. 51BrossardQuebec
    10.8
  52. 51QuébecQuebec
    10.8
  53. 53OttawaOntario
    10.5
  54. 53EdmundstonNew Brunswick
    10.5
  55. 55Rouyn-NorandaQuebec
    10.3
  56. 56Prince GeorgeBritish Columbia
    10.2
  57. 57MontréalQuebec
    10.1
  58. 58Saint-GeorgesQuebec
    10.0
  59. 59GranbyQuebec
    9.9
  60. 60Sept-ÎlesQuebec
    9.4
  61. 61Trois-RivièresQuebec
    9.3
  62. 62DrummondvilleQuebec
    9.1
  63. 62SaguenayQuebec
    9.1
  64. 64Rivière-des-Prairies–Pointe-aux-TremblesQuebec
    9.0
  65. 65SherbrookeQuebec
    8.6
  66. 66Saint-Jean-sur-RichelieuQuebec
    8.4
  67. 67ChilliwackBritish Columbia
    8.1
  68. 68MiramichiNew Brunswick
    7.6
  69. 69FrederictonNew Brunswick
    7.0
  70. 70Port AlberniBritish Columbia
    6.9
  71. 71AbbotsfordBritish Columbia
    6.8
  72. 71Saint JohnNew Brunswick
    6.8
  73. 71SquamishBritish Columbia
    6.8
  74. 74CoquitlamBritish Columbia
    6.7
  75. 75MonctonNew Brunswick
    6.5
  76. 76Port CoquitlamBritish Columbia
    6.1
  77. 77NanaimoBritish Columbia
    6.0
  78. 78BurnabyBritish Columbia
    5.9
  79. 79CharlottetownPrince Edward Island
    5.7
  80. 79LangleyBritish Columbia
    5.7
  81. 81Strawberry HillBritish Columbia
    5.6
  82. 81VancouverBritish Columbia
    5.6
  83. 83SydneyNova Scotia
    5.4
  84. 84West VancouverBritish Columbia
    5.2
  85. 85DartmouthNova Scotia
    5.1
  86. 85RichmondBritish Columbia
    5.1
  87. 87DeltaBritish Columbia
    4.8
  88. 87HarewoodBritish Columbia
    4.8
  89. 89VictoriaBritish Columbia
    4.7
  90. 90North VancouverBritish Columbia
    4.6
  91. 91TerraceBritish Columbia
    4.5
  92. 92DuncanBritish Columbia
    4.1
  93. 93WhitehorseYukon
    4.0
  94. 94North CowichanBritish Columbia
    3.6
  95. 95LangfordBritish Columbia
    3.5
  96. 96Campbell RiverBritish Columbia
    2.9
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 2026 · Canada now