SmogRank / Countries / Canada / October 2025
Most polluted cities in Canada, October 2025
93 cities in Canada ranked by their average PM2.5 over the 31 days. Worst: Edmonton at 8.5 µg/m³, #527 of 2,110 cities in the world. Cleanest: Winnipeg at 2.8. A city needs measurements on 70% of the days to be ranked.
- 1EdmontonAlberta 8.5
- 2BarrieOntario 8.4
- 3WindsorOntario 7.5
- 4DuncanBritish Columbia 7.0
- 5Prince GeorgeBritish Columbia 6.4
- 6LondonOntario 6.2
- 6SaskatoonSaskatchewan 6.2
- 8Prince AlbertSaskatchewan 6.0
- 9CalgaryAlberta 5.9
- 9Sherwood ParkAlberta 5.9
- 9VernonBritish Columbia 5.9
- 12CranbrookBritish Columbia 5.7
- 12St. AlbertAlberta 5.7
- 12TorontoOntario 5.7
- 15TerraceBritish Columbia 5.6
- 16KamloopsBritish Columbia 5.4
- 16LangfordBritish Columbia 5.4
- 18Red DeerAlberta 5.3
- 18ReginaSaskatchewan 5.3
- 20Nepeanlow-cost sensorsOntario 5.2
- 21BrantfordOntario 5.1
- 22AbbotsfordBritish Columbia 5.0
- 22Campbell RiverBritish Columbia 5.0
- 22CornwallOntario 5.0
- 22RichmondBritish Columbia 5.0
- 22SaguenayQuebec 5.0
- 22VancouverBritish Columbia 5.0
- 22QuébecQuebec 5.0
- 29MissionBritish Columbia 4.9
- 29MontréalQuebec 4.9
- 29NewmarketOntario 4.9
- 29L'Ancienne-LoretteQuebec 4.9
- 29EdmundstonNew Brunswick 4.9
- 34ChilliwackBritish Columbia 4.8
- 34KitchenerOntario 4.8
- 34MiltonOntario 4.8
- 34ShawiniganQuebec 4.8
- 38LangleyBritish Columbia 4.6
- 38NanaimoBritish Columbia 4.6
- 40BramptonOntario 4.5
- 40BurnabyBritish Columbia 4.5
- 40GranbyQuebec 4.5
- 40SarniaOntario 4.5
- 40SquamishBritish Columbia 4.5
- 40Strawberry HillBritish Columbia 4.5
- 40Rivière-des-Prairies–Pointe-aux-TremblesQuebec 4.5
- 47BrossardQuebec 4.4
- 47DorvalQuebec 4.4
- 47KelownaBritish Columbia 4.4
- 47St. CatharinesOntario 4.4
- 51CoquitlamBritish Columbia 4.3
- 51MississaugaOntario 4.3
- 53DeltaBritish Columbia 4.2
- 53Fort McMurrayAlberta 4.2
- 53GuelphOntario 4.2
- 53HamiltonOntario 4.2
- 53Medicine HatAlberta 4.2
- 53OakvilleOntario 4.2
- 53Saint JohnNew Brunswick 4.2
- 53Trois-RivièresQuebec 4.2
- 61North BayOntario 4.1
- 61North CowichanBritish Columbia 4.1
- 61OttawaOntario 4.1
- 64DrummondvilleQuebec 3.9
- 64Greater SudburyOntario 3.9
- 64Port CoquitlamBritish Columbia 3.9
- 64Swift CurrentSaskatchewan 3.9
- 64WaterdownOntario 3.9
- 69BellevilleOntario 3.8
- 69ChathamOntario 3.8
- 69KingstonOntario 3.8
- 69North VancouverBritish Columbia 3.8
- 73Grande PrairieAlberta 3.7
- 73MonctonNew Brunswick 3.7
- 73SherbrookeQuebec 3.7
- 73St. ThomasOntario 3.7
- 77SydneyNova Scotia 3.6
- 77West VancouverBritish Columbia 3.6
- 79CharlottetownPrince Edward Island 3.5
- 79Gatineaulow-cost sensorsQuebec 3.5
- 79PeterboroughOntario 3.5
- 82FrederictonNew Brunswick 3.4
- 82LethbridgeAlberta 3.4
- 82Saint-Jean-sur-RichelieuQuebec 3.4
- 82Sept-ÎlesQuebec 3.4
- 86DartmouthNova Scotia 3.3
- 86Fort St. JohnBritish Columbia 3.3
- 86Yellowknifelow-cost sensorsNorthwest Territories 3.3
- 89MiramichiNew Brunswick 3.2
- 90Rouyn-NorandaQuebec 3.1
- 90Sault Ste. MarieOntario 3.1
- 92WhitehorseYukon 2.9
- 93Winnipeglow-cost sensorsManitoba 2.8
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+