SmogRank / Countries / Canada / June 2025

Most polluted cities in Canada, June 2025

91 cities in Canada ranked by their average PM2.5 over the 30 days. Worst: Prince Albert at 28.2 µg/m³, #82 of 1,912 cities in the world. Cleanest: North Cowichan at 3.1. A city needs measurements on 70% of the days to be ranked.

  1. 1Prince AlbertSaskatchewan
    28.2
  2. 2Grande PrairieAlberta
    26.1
  3. 3SaskatoonSaskatchewan
    22.2
  4. 4Nepeanlow-cost sensorsOntario
    20.9
  5. 5Fort McMurrayAlberta
    20.1
  6. 6ReginaSaskatchewan
    19.9
  7. 7EdmontonAlberta
    18.7
  8. 8WindsorOntario
    18.1
  9. 9CalgaryAlberta
    17.1
  10. 10Swift CurrentSaskatchewan
    17.0
  11. 11Fort St. JohnBritish Columbia
    16.6
  12. 11Red DeerAlberta
    16.6
  13. 13Medicine HatAlberta
    15.2
  14. 14St. AlbertAlberta
    14.9
  15. 15MiltonOntario
    14.8
  16. 16LethbridgeAlberta
    14.6
  17. 16SarniaOntario
    14.6
  18. 16TorontoOntario
    14.6
  19. 19NewmarketOntario
    14.4
  20. 20KitchenerOntario
    14.1
  21. 21LondonOntario
    13.6
  22. 22GuelphOntario
    13.5
  23. 22HamiltonOntario
    13.5
  24. 24BrantfordOntario
    13.4
  25. 24St. ThomasOntario
    13.4
  26. 26AirdrieAlberta
    13.3
  27. 27BramptonOntario
    13.1
  28. 27OakvilleOntario
    13.1
  29. 29BarrieOntario
    13.0
  30. 30MontréalQuebec
    12.9
  31. 31DorvalQuebec
    12.8
  32. 31Sault Ste. MarieOntario
    12.8
  33. 33CornwallOntario
    12.7
  34. 33Sherwood ParkAlberta
    12.7
  35. 35BellevilleOntario
    12.6
  36. 35Sorel-TracyQuebec
    12.6
  37. 37OttawaOntario
    12.5
  38. 38Rouyn-NorandaQuebec
    12.3
  39. 38WaterdownOntario
    12.3
  40. 40PeterboroughOntario
    12.2
  41. 41Greater SudburyOntario
    12.0
  42. 41MississaugaOntario
    12.0
  43. 43AllistonOntario
    11.8
  44. 43ChathamOntario
    11.8
  45. 45L'Ancienne-LoretteQuebec
    11.7
  46. 46SaguenayQuebec
    11.6
  47. 46St. CatharinesOntario
    11.6
  48. 48KingstonOntario
    11.5
  49. 49Rivière-des-Prairies–Pointe-aux-TremblesQuebec
    11.4
  50. 50BrossardQuebec
    11.3
  51. 50GranbyQuebec
    11.3
  52. 52Trois-RivièresQuebec
    10.8
  53. 53QuébecQuebec
    10.5
  54. 54North BayOntario
    10.3
  55. 55ShawiniganQuebec
    10.1
  56. 56DrummondvilleQuebec
    9.9
  57. 56EdmundstonNew Brunswick
    9.9
  58. 58Sept-ÎlesQuebec
    9.6
  59. 59Saint-Jean-sur-RichelieuQuebec
    9.3
  60. 60Prince GeorgeBritish Columbia
    8.6
  61. 60SherbrookeQuebec
    8.6
  62. 62KamloopsBritish Columbia
    6.2
  63. 63ChilliwackBritish Columbia
    5.7
  64. 63VernonBritish Columbia
    5.7
  65. 63VictoriaBritish Columbia
    5.7
  66. 66CranbrookBritish Columbia
    5.6
  67. 66WhitehorseYukon
    5.6
  68. 68AbbotsfordBritish Columbia
    5.4
  69. 68SquamishBritish Columbia
    5.4
  70. 70MissionBritish Columbia
    5.3
  71. 71DartmouthNova Scotia
    5.2
  72. 72BurnabyBritish Columbia
    4.8
  73. 72CharlottetownPrince Edward Island
    4.8
  74. 74CoquitlamBritish Columbia
    4.7
  75. 74LangfordBritish Columbia
    4.7
  76. 74Port CoquitlamBritish Columbia
    4.7
  77. 74VancouverBritish Columbia
    4.7
  78. 78LangleyBritish Columbia
    4.6
  79. 79KelownaBritish Columbia
    4.5
  80. 79Strawberry HillBritish Columbia
    4.5
  81. 81DuncanBritish Columbia
    4.4
  82. 82SydneyNova Scotia
    4.3
  83. 82West VancouverBritish Columbia
    4.3
  84. 84RichmondBritish Columbia
    4.2
  85. 85DeltaBritish Columbia
    4.1
  86. 85Port AlberniBritish Columbia
    4.1
  87. 87North VancouverBritish Columbia
    4.0
  88. 88NanaimoBritish Columbia
    3.9
  89. 89TerraceBritish Columbia
    3.8
  90. 90HarewoodBritish Columbia
    3.7
  91. 91North CowichanBritish Columbia
    3.1
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, June 2025 · Canada now