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
    38.5
  2. 2EdmontonAlberta
    35.7
  3. 3Fort St. JohnBritish Columbia
    35.4
  4. 4Grande PrairieAlberta
    33.1
  5. 5Prince GeorgeBritish Columbia
    24.9
  6. 6Red DeerAlberta
    21.1
  7. 7St. AlbertAlberta
    18.8
  8. 8KamloopsBritish Columbia
    17.5
  9. 9CalgaryAlberta
    17.1
  10. 10L'Ancienne-LoretteQuebec
    15.5
  11. 11SaguenayQuebec
    15.1
  12. 12Medicine HatAlberta
    14.5
  13. 13AirdrieAlberta
    14.4
  14. 14BarrieOntario
    13.5
  15. 15Sherwood ParkAlberta
    13.3
  16. 16GranbyQuebec
    13.1
  17. 17BrossardQuebec
    12.9
  18. 17KingstonOntario
    12.9
  19. 17QuébecQuebec
    12.9
  20. 20CornwallOntario
    12.7
  21. 21HamiltonOntario
    12.6
  22. 22LondonOntario
    12.5
  23. 23DrummondvilleQuebec
    12.4
  24. 23KitchenerOntario
    12.4
  25. 23MontréalQuebec
    12.4
  26. 23SarniaOntario
    12.4
  27. 27BrantfordOntario
    12.2
  28. 27PeterboroughOntario
    12.2
  29. 27ShawiniganQuebec
    12.2
  30. 30OttawaOntario
    12.1
  31. 31LethbridgeAlberta
    11.6
  32. 31Rivière-des-Prairies–Pointe-aux-TremblesQuebec
    11.6
  33. 33CranbrookBritish Columbia
    11.5
  34. 34BellevilleOntario
    11.4
  35. 34TorontoOntario
    11.4
  36. 36St. ThomasOntario
    11.1
  37. 37St. CatharinesOntario
    11.0
  38. 38Saint-Jean-sur-RichelieuQuebec
    10.8
  39. 39BrandonManitoba
    10.7
  40. 40ChathamOntario
    10.6
  41. 40DorvalQuebec
    10.6
  42. 40Greater SudburyOntario
    10.6
  43. 43North BayOntario
    10.5
  44. 44EdmundstonNew Brunswick
    10.2
  45. 45WhitehorseYukon
    9.4
  46. 46VernonBritish Columbia
    9.2
  47. 47Sault Ste. MarieOntario
    8.3
  48. 48St. John'sNewfoundland and Labrador
    8.0
  49. 49MiramichiNew Brunswick
    7.6
  50. 49MonctonNew Brunswick
    7.6
  51. 51FrederictonNew Brunswick
    7.4
  52. 52KelownaBritish Columbia
    6.9
  53. 53Saint JohnNew Brunswick
    6.2
  54. 53SquamishBritish Columbia
    6.2
  55. 55TerraceBritish Columbia
    6.0
  56. 56ChilliwackBritish Columbia
    5.8
  57. 56PentictonBritish Columbia
    5.8
  58. 58CharlottetownPrince Edward Island
    5.7
  59. 59CoquitlamBritish Columbia
    5.4
  60. 59VictoriaBritish Columbia
    5.4
  61. 61Mount PearlNewfoundland and Labrador
    5.3
  62. 61Strawberry HillBritish Columbia
    5.3
  63. 63Corner BrookNewfoundland and Labrador
    5.2
  64. 64AbbotsfordBritish Columbia
    5.1
  65. 65BurnabyBritish Columbia
    4.9
  66. 65Port CoquitlamBritish Columbia
    4.9
  67. 67LangfordBritish Columbia
    4.8
  68. 67West VancouverBritish Columbia
    4.8
  69. 69LangleyBritish Columbia
    4.5
  70. 70HarewoodBritish Columbia
    4.3
  71. 71NanaimoBritish Columbia
    4.0
  72. 71North VancouverBritish Columbia
    4.0
  73. 71RichmondBritish Columbia
    4.0
  74. 71VancouverBritish Columbia
    4.0
  75. 75DuncanBritish Columbia
    3.5
  76. 76DeltaBritish Columbia
    3.3
  77. 76Port AlberniBritish Columbia
    3.3
  78. 78CourtenayBritish Columbia
    3.1
  79. 79North CowichanBritish Columbia
    2.5
  80. 80Campbell RiverBritish Columbia
    1.4
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

PM2.5 in µg/m³, coloured by the US EPA's PM2.5 categories. 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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