SmogRank / World / Canada / July 2023

Most polluted cities in Canada, July 2023

80 cities in Canada ranked by their average PM2.5 over the 31 days. Worst: Fort McMurray at 38.5 µg/m³, #4 of 1,103 cities in the world. Cleanest: Campbell River at 1.4. A city needs measurements on 70% of the days to be ranked.

OpenAQ's archive, where our readings come from, has almost none for one of these days. Cities in the United States and Europe have it from the EPA's and the European Environment Agency's own records of the same monitors; elsewhere a city's average is over its other days. Why.

← Fort McMurray 38.5
Every city in Canada ranked for July 2023, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1Fort McMurrayAlberta
    108
  2. 2EdmontonAlberta
    101
  3. 3Fort St. JohnBritish Columbia
    100
  4. 4Grande PrairieAlberta
    96
  5. 5Prince GeorgeBritish Columbia
    80
  6. 6Red DeerAlberta
    73
  7. 7St. AlbertAlberta
    69
  8. 8KamloopsBritish Columbia
    67
  9. 9CalgaryAlberta
    66
  10. 10L'Ancienne-LoretteQuebec
    63
  11. 11SaguenayQuebec
    62
  12. 12Medicine HatAlberta
    61
  13. 13AirdrieAlberta
    61
  14. 14BarrieOntario
    59
  15. 15Sherwood ParkAlberta
    59
  16. 16GranbyQuebec
    58
  17. 17BrossardQuebec
    58
  18. 17KingstonOntario
    58
  19. 17QuébecQuebec
    58
  20. 20CornwallOntario
    58
  21. 21HamiltonOntario
    58
  22. 22LondonOntario
    57
  23. 23DrummondvilleQuebec
    57
  24. 23KitchenerOntario
    57
  25. 23MontréalQuebec
    57
  26. 23SarniaOntario
    57
  27. 27BrantfordOntario
    57
  28. 27PeterboroughOntario
    57
  29. 27ShawiniganQuebec
    57
  30. 30OttawaOntario
    57
  31. 31LethbridgeAlberta
    56
  32. 31Rivière-des-Prairies–Pointe-aux-TremblesQuebec
    56
  33. 33CranbrookBritish Columbia
    55
  34. 34BellevilleOntario
    55
  35. 34TorontoOntario
    55
  36. 36St. ThomasOntario
    55
  37. 37St. CatharinesOntario
    55
  38. 38Saint-Jean-sur-RichelieuQuebec
    54
  39. 39BrandonManitoba
    54
  40. 40ChathamOntario
    54
  41. 40DorvalQuebec
    54
  42. 40Greater SudburyOntario
    54
  43. 43North BayOntario
    54
  44. 44EdmundstonNew Brunswick
    53
  45. 45WhitehorseYukon
    52
  46. 46VernonBritish Columbia
    51
  47. 47Sault Ste. MarieOntario
    46
  48. 48St. John'sNewfoundland and Labrador
    44
  49. 49MiramichiNew Brunswick
    42
  50. 49MonctonNew Brunswick
    42
  51. 51FrederictonNew Brunswick
    41
  52. 52KelownaBritish Columbia
    38
  53. 53Saint JohnNew Brunswick
    34
  54. 53SquamishBritish Columbia
    34
  55. 55TerraceBritish Columbia
    33
  56. 56ChilliwackBritish Columbia
    32
  57. 56PentictonBritish Columbia
    32
  58. 58CharlottetownPrince Edward Island
    32
  59. 59CoquitlamBritish Columbia
    30
  60. 59VictoriaBritish Columbia
    30
  61. 61Mount PearlNewfoundland and Labrador
    29
  62. 61Strawberry HillBritish Columbia
    29
  63. 63Corner BrookNewfoundland and Labrador
    29
  64. 64AbbotsfordBritish Columbia
    28
  65. 65BurnabyBritish Columbia
    27
  66. 65Port CoquitlamBritish Columbia
    27
  67. 67LangfordBritish Columbia
    27
  68. 67West VancouverBritish Columbia
    27
  69. 69LangleyBritish Columbia
    25
  70. 70HarewoodBritish Columbia
    24
  71. 71NanaimoBritish Columbia
    22
  72. 71North VancouverBritish Columbia
    22
  73. 71RichmondBritish Columbia
    22
  74. 71VancouverBritish Columbia
    22
  75. 75DuncanBritish Columbia
    19
  76. 76DeltaBritish Columbia
    18
  77. 76Port AlberniBritish Columbia
    18
  78. 78CourtenayBritish Columbia
    17
  79. 79North CowichanBritish Columbia
    14
  80. 80Campbell RiverBritish Columbia
    8
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, July 2023 · Canada now

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SmogRank, most polluted cities in Canada, PM2.5, July 2023, smogrank.com/ca/history/2023-07 (accessed 2 Oct 2026).

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