SmogRank / Countries / Canada / April 2025
Most polluted cities in Canada, April 2025
92 cities in Canada ranked by their average PM2.5 over the 30 days. Worst: Windsor at 6.8 µg/m³, #1,610 of 2,286 cities in the world. Cleanest: Campbell River at 2.2. A city needs measurements on 70% of the days to be ranked.
- 1WindsorOntario 6.8
- 2EdmontonAlberta 6.5
- 3BrantfordOntario 6.1
- 3HamiltonOntario 6.1
- 5SaskatoonSaskatchewan 6.0
- 6BarrieOntario 5.9
- 6HarewoodBritish Columbia 5.9
- 8CalgaryAlberta 5.8
- 9TorontoOntario 5.7
- 10LondonOntario 5.4
- 10Port AlberniBritish Columbia 5.4
- 10Prince GeorgeBritish Columbia 5.4
- 10Sorel-TracyQuebec 5.4
- 14Prince AlbertSaskatchewan 5.3
- 14VictoriaBritish Columbia 5.3
- 16MiltonOntario 5.2
- 16OakvilleOntario 5.2
- 16ReginaSaskatchewan 5.2
- 16VernonBritish Columbia 5.2
- 20KitchenerOntario 5.1
- 20SarniaOntario 5.1
- 20St. ThomasOntario 5.1
- 20WaterdownOntario 5.1
- 24Nepeanlow-cost sensorsOntario 5.0
- 24St. CatharinesOntario 5.0
- 26ChilliwackBritish Columbia 4.9
- 26LangfordBritish Columbia 4.9
- 26LangleyBritish Columbia 4.9
- 29AbbotsfordBritish Columbia 4.8
- 29BramptonOntario 4.8
- 29NewmarketOntario 4.8
- 29Red DeerAlberta 4.8
- 33CranbrookBritish Columbia 4.7
- 33Fort St. JohnBritish Columbia 4.7
- 33MissionBritish Columbia 4.7
- 33MississaugaOntario 4.7
- 33SquamishBritish Columbia 4.7
- 33St. AlbertAlberta 4.7
- 33Trois-RivièresQuebec 4.7
- 40ChathamOntario 4.6
- 40DuncanBritish Columbia 4.6
- 40GuelphOntario 4.6
- 40MontréalQuebec 4.6
- 40Strawberry HillBritish Columbia 4.6
- 45Greater SudburyOntario 4.5
- 45KamloopsBritish Columbia 4.5
- 45Swift CurrentSaskatchewan 4.5
- 45VancouverBritish Columbia 4.5
- 45EdmundstonNew Brunswick 4.5
- 50BurnabyBritish Columbia 4.4
- 50SaguenayQuebec 4.4
- 52CornwallOntario 4.3
- 52Port CoquitlamBritish Columbia 4.3
- 52TerraceBritish Columbia 4.3
- 55CoquitlamBritish Columbia 4.2
- 55Medicine HatAlberta 4.2
- 55North BayOntario 4.2
- 55OttawaOntario 4.2
- 55RichmondBritish Columbia 4.2
- 55L'Ancienne-LoretteQuebec 4.2
- 55Rivière-des-Prairies–Pointe-aux-TremblesQuebec 4.2
- 62AllistonOntario 4.1
- 62GranbyQuebec 4.1
- 64DorvalQuebec 4.0
- 64Fort McMurrayAlberta 4.0
- 64Grande PrairieAlberta 4.0
- 64PeterboroughOntario 4.0
- 64Sherwood ParkAlberta 4.0
- 64QuébecQuebec 4.0
- 70BellevilleOntario 3.9
- 70DeltaBritish Columbia 3.9
- 70KelownaBritish Columbia 3.9
- 70LethbridgeAlberta 3.9
- 74AirdrieAlberta 3.8
- 74BrossardQuebec 3.8
- 74DrummondvilleQuebec 3.8
- 74Gatineaulow-cost sensorsQuebec 3.8
- 74KingstonOntario 3.8
- 74ShawiniganQuebec 3.8
- 80Rouyn-NorandaQuebec 3.7
- 81North VancouverBritish Columbia 3.6
- 81Sault Ste. MarieOntario 3.6
- 83West VancouverBritish Columbia 3.5
- 84SydneyNova Scotia 3.4
- 85CharlottetownPrince Edward Island 3.2
- 85Saint-Jean-sur-RichelieuQuebec 3.2
- 87DartmouthNova Scotia 2.9
- 87North CowichanBritish Columbia 2.9
- 89NanaimoBritish Columbia 2.8
- 89WhitehorseYukon 2.8
- 91SherbrookeQuebec 2.7
- 92Campbell RiverBritish Columbia 2.2
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+