SmogRank / Countries / Canada / 2025
Most polluted cities in Canada, 2025
95 cities in Canada ranked by their average PM2.5 over the 365 days; 73 above the WHO annual guideline (5.0 µg/m³). Worst: Prince Albert at 13.6 µg/m³, #287 of 2,131 cities in the world. Cleanest: Dartmouth at 3.6. A city needs measurements on 70% of the days to be ranked.
- 1Prince AlbertSaskatchewan 13.62.7×
- 2Fort McMurrayAlberta 12.92.6×
- 3EdmontonAlberta 12.22.4×
- 4SaskatoonSaskatchewan 11.42.3×
- 5WindsorOntario 11.12.2×
- 6ReginaSaskatchewan 10.72.1×
- 7CalgaryAlberta 10.22.0×
- 8Nepeanlow-cost sensorsOntario 10.02.0×
- 9Grande PrairieAlberta 9.61.9×
- 10St. AlbertAlberta 9.51.9×
- 11Sorel-TracyQuebec 9.31.9×
- 12Prince GeorgeBritish Columbia 9.11.8×
- 13Sherwood ParkAlberta 9.01.8×
- 14Red DeerAlberta 8.91.8×
- 15TorontoOntario 8.71.7×
- 16MiltonOntario 8.31.7×
- 16Swift CurrentSaskatchewan 8.31.7×
- 18LondonOntario 8.21.6×
- 19BarrieOntario 8.11.6×
- 19BrantfordOntario 8.11.6×
- 21HamiltonOntario 8.01.6×
- 21SarniaOntario 8.01.6×
- 21L'Ancienne-LoretteQuebec 8.01.6×
- 24NewmarketOntario 7.91.6×
- 25KitchenerOntario 7.81.6×
- 26Medicine HatAlberta 7.71.5×
- 26MontréalQuebec 7.71.5×
- 28OakvilleOntario 7.61.5×
- 29BramptonOntario 7.41.5×
- 29CranbrookBritish Columbia 7.41.5×
- 29DorvalQuebec 7.41.5×
- 29LethbridgeAlberta 7.41.5×
- 29Trois-RivièresQuebec 7.41.5×
- 29VernonBritish Columbia 7.41.5×
- 29WaterdownOntario 7.41.5×
- 29QuébecQuebec 7.41.5×
- 37CornwallOntario 7.31.5×
- 37GuelphOntario 7.31.5×
- 39GranbyQuebec 7.21.4×
- 39MississaugaOntario 7.21.4×
- 39ShawiniganQuebec 7.21.4×
- 39St. CatharinesOntario 7.21.4×
- 39St. ThomasOntario 7.21.4×
- 39Rivière-des-Prairies–Pointe-aux-TremblesQuebec 7.21.4×
- 45BrossardQuebec 7.11.4×
- 45Port AlberniBritish Columbia 7.11.4×
- 47AllistonOntario 7.01.4×
- 48ChathamOntario 6.91.4×
- 48Fort St. JohnBritish Columbia 6.91.4×
- 48KamloopsBritish Columbia 6.91.4×
- 48OttawaOntario 6.91.4×
- 52DrummondvilleQuebec 6.81.4×
- 53SaguenayQuebec 6.61.3×
- 54BellevilleOntario 6.51.3×
- 54PeterboroughOntario 6.51.3×
- 56Sault Ste. MarieOntario 6.41.3×
- 57Greater SudburyOntario 6.31.3×
- 57EdmundstonNew Brunswick 6.31.3×
- 59KingstonOntario 6.21.2×
- 59Rouyn-NorandaQuebec 6.21.2×
- 61SherbrookeQuebec 6.11.2×
- 62KelownaBritish Columbia 6.01.2×
- 63AirdrieAlberta 5.91.2×
- 63SquamishBritish Columbia 5.91.2×
- 65DuncanBritish Columbia 5.81.2×
- 65North BayOntario 5.81.2×
- 67Saint-Jean-sur-RichelieuQuebec 5.51.1×
- 68VictoriaBritish Columbia 5.41.1×
- 69ChilliwackBritish Columbia 5.31.1×
- 69LangfordBritish Columbia 5.31.1×
- 69VancouverBritish Columbia 5.31.1×
- 72AbbotsfordBritish Columbia 5.11.0×
- 72MissionBritish Columbia 5.11.0×
- 74RichmondBritish Columbia 4.91.0×
- 75BurnabyBritish Columbia 4.81.0×
- 75CoquitlamBritish Columbia 4.81.0×
- 75LangleyBritish Columbia 4.81.0×
- 75TerraceBritish Columbia 4.81.0×
- 79Saint JohnNew Brunswick 4.70.9×
- 79Strawberry HillBritish Columbia 4.70.9×
- 79HarewoodBritish Columbia 4.70.9×
- 82FrederictonNew Brunswick 4.50.9×
- 82MonctonNew Brunswick 4.50.9×
- 82NanaimoBritish Columbia 4.50.9×
- 82Port CoquitlamBritish Columbia 4.50.9×
- 86MiramichiNew Brunswick 4.20.8×
- 86WhitehorseYukon 4.20.8×
- 88DeltaBritish Columbia 4.10.8×
- 88West VancouverBritish Columbia 4.10.8×
- 90North VancouverBritish Columbia 4.00.8×
- 90SydneyNova Scotia 4.00.8×
- 92CharlottetownPrince Edward Island 3.90.8×
- 92North CowichanBritish Columbia 3.90.8×
- 94Campbell RiverBritish Columbia 3.80.8×
- 95DartmouthNova Scotia 3.60.7×
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+