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 1,110 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
    65
  2. 2EdmontonAlberta
    59
  3. 3Fort St. JohnBritish Columbia
    58
  4. 4Grande PrairieAlberta
    54
  5. 5Prince GeorgeBritish Columbia
    42
  6. 6Red DeerAlberta
    35
  7. 7St. AlbertAlberta
    32
  8. 8KamloopsBritish Columbia
    30
  9. 9CalgaryAlberta
    28
  10. 10L'Ancienne-LoretteQuebec
    27
  11. 11SaguenayQuebec
    25
  12. 12Medicine HatAlberta
    25
  13. 13AirdrieAlberta
    23
  14. 14BarrieOntario
    23
  15. 15Sherwood ParkAlberta
    22
  16. 16GranbyQuebec
    22
  17. 17BrossardQuebec
    22
  18. 17KingstonOntario
    22
  19. 17QuébecQuebec
    22
  20. 20CornwallOntario
    22
  21. 21HamiltonOntario
    22
  22. 22LondonOntario
    22
  23. 23DrummondvilleQuebec
    20
  24. 23KitchenerOntario
    20
  25. 23MontréalQuebec
    20
  26. 23SarniaOntario
    20
  27. 27BrantfordOntario
    20
  28. 27PeterboroughOntario
    20
  29. 27ShawiniganQuebec
    20
  30. 30OttawaOntario
    20
  31. 31LethbridgeAlberta
    20
  32. 31Rivière-des-Prairies–Pointe-aux-TremblesQuebec
    20
  33. 33CranbrookBritish Columbia
    20
  34. 34BellevilleOntario
    18
  35. 34TorontoOntario
    18
  36. 36St. ThomasOntario
    18
  37. 37St. CatharinesOntario
    18
  38. 38Saint-Jean-sur-RichelieuQuebec
    18
  39. 39BrandonManitoba
    18
  40. 40ChathamOntario
    18
  41. 40DorvalQuebec
    18
  42. 40Greater SudburyOntario
    18
  43. 43North BayOntario
    18
  44. 44EdmundstonNew Brunswick
    17
  45. 45WhitehorseYukon
    15
  46. 46VernonBritish Columbia
    15
  47. 47Sault Ste. MarieOntario
    13
  48. 48St. John'sNewfoundland and Labrador
    13
  49. 49MiramichiNew Brunswick
    13
  50. 49MonctonNew Brunswick
    13
  51. 51FrederictonNew Brunswick
    12
  52. 52KelownaBritish Columbia
    12
  53. 53Saint JohnNew Brunswick
    10
  54. 53SquamishBritish Columbia
    10
  55. 55TerraceBritish Columbia
    10
  56. 56ChilliwackBritish Columbia
    10
  57. 56PentictonBritish Columbia
    10
  58. 58CharlottetownPrince Edward Island
    10
  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
    8
  66. 65Port CoquitlamBritish Columbia
    8
  67. 67LangfordBritish Columbia
    8
  68. 67West VancouverBritish Columbia
    8
  69. 69LangleyBritish Columbia
    8
  70. 70HarewoodBritish Columbia
    7
  71. 71NanaimoBritish Columbia
    7
  72. 71North VancouverBritish Columbia
    7
  73. 71RichmondBritish Columbia
    7
  74. 71VancouverBritish Columbia
    7
  75. 75DuncanBritish Columbia
    7
  76. 76DeltaBritish Columbia
    5
  77. 76Port AlberniBritish Columbia
    5
  78. 78CourtenayBritish Columbia
    5
  79. 79North CowichanBritish Columbia
    5
  80. 80Campbell RiverBritish Columbia
    2
Good0–50
Satisfactory51–100
Moderate101–200
Poor201–300
Very poor301–400
Severe401+

India's National Air Quality Index (CPCB), PM2.5 sub-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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