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
    55
  2. 2EdmontonAlberta
    51
  3. 3Fort St. JohnBritish Columbia
    51
  4. 4Grande PrairieAlberta
    48
  5. 5Prince GeorgeBritish Columbia
    36
  6. 6Red DeerAlberta
    31
  7. 7St. AlbertAlberta
    27
  8. 8KamloopsBritish Columbia
    25
  9. 9CalgaryAlberta
    25
  10. 10L'Ancienne-LoretteQuebec
    23
  11. 11SaguenayQuebec
    22
  12. 12Medicine HatAlberta
    21
  13. 13AirdrieAlberta
    21
  14. 14BarrieOntario
    20
  15. 15Sherwood ParkAlberta
    19
  16. 16GranbyQuebec
    19
  17. 17BrossardQuebec
    19
  18. 17KingstonOntario
    19
  19. 17QuébecQuebec
    19
  20. 20CornwallOntario
    19
  21. 21HamiltonOntario
    18
  22. 22LondonOntario
    18
  23. 23DrummondvilleQuebec
    18
  24. 23KitchenerOntario
    18
  25. 23MontréalQuebec
    18
  26. 23SarniaOntario
    18
  27. 27BrantfordOntario
    18
  28. 27PeterboroughOntario
    18
  29. 27ShawiniganQuebec
    18
  30. 30OttawaOntario
    18
  31. 31LethbridgeAlberta
    17
  32. 31Rivière-des-Prairies–Pointe-aux-TremblesQuebec
    17
  33. 33CranbrookBritish Columbia
    17
  34. 34BellevilleOntario
    17
  35. 34TorontoOntario
    17
  36. 36St. ThomasOntario
    16
  37. 37St. CatharinesOntario
    16
  38. 38Saint-Jean-sur-RichelieuQuebec
    16
  39. 39BrandonManitoba
    16
  40. 40ChathamOntario
    16
  41. 40DorvalQuebec
    16
  42. 40Greater SudburyOntario
    16
  43. 43North BayOntario
    15
  44. 44EdmundstonNew Brunswick
    15
  45. 45WhitehorseYukon
    14
  46. 46VernonBritish Columbia
    14
  47. 47Sault Ste. MarieOntario
    12
  48. 48St. John'sNewfoundland and Labrador
    12
  49. 49MiramichiNew Brunswick
    11
  50. 49MonctonNew Brunswick
    11
  51. 51FrederictonNew Brunswick
    11
  52. 52KelownaBritish Columbia
    10
  53. 53Saint JohnNew Brunswick
    9
  54. 53SquamishBritish Columbia
    9
  55. 55TerraceBritish Columbia
    9
  56. 56ChilliwackBritish Columbia
    9
  57. 56PentictonBritish Columbia
    9
  58. 58CharlottetownPrince Edward Island
    9
  59. 59CoquitlamBritish Columbia
    8
  60. 59VictoriaBritish Columbia
    8
  61. 61Mount PearlNewfoundland and Labrador
    8
  62. 61Strawberry HillBritish Columbia
    8
  63. 63Corner BrookNewfoundland and Labrador
    8
  64. 64AbbotsfordBritish Columbia
    8
  65. 65BurnabyBritish Columbia
    7
  66. 65Port CoquitlamBritish Columbia
    7
  67. 67LangfordBritish Columbia
    7
  68. 67West VancouverBritish Columbia
    7
  69. 69LangleyBritish Columbia
    7
  70. 70HarewoodBritish Columbia
    7
  71. 71NanaimoBritish Columbia
    6
  72. 71North VancouverBritish Columbia
    6
  73. 71RichmondBritish Columbia
    6
  74. 71VancouverBritish Columbia
    6
  75. 75DuncanBritish Columbia
    5
  76. 76DeltaBritish Columbia
    5
  77. 76Port AlberniBritish Columbia
    5
  78. 78CourtenayBritish Columbia
    5
  79. 79North CowichanBritish Columbia
    4
  80. 80Campbell RiverBritish Columbia
    2
Excellent0–50
Good51–100
Lightly polluted101–150
Moderately polluted151–200
Heavily polluted201–300
Severely polluted301+

China's Air Quality Index (HJ 633-2012), PM2.5 individual index. 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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