SmogRank / Countries / Canada / May 2026
Most polluted cities in Canada, May 2026
94 cities in Canada ranked by their average PM2.5 over the 31 days. Worst: Edmonton at 7.7 µg/m³, #1,049 of 2,237 cities in the world. Cleanest: Gatineau at 2.2. A city needs measurements on 70% of the days to be ranked.
- 1EdmontonAlberta 7.7
- 2Red DeerAlberta 7.6
- 3Prince AlbertSaskatchewan 7.4
- 4BrantfordOntario 6.5
- 4CalgaryAlberta 6.5
- 6AbbotsfordBritish Columbia 6.4
- 7VictoriaBritish Columbia 6.0
- 8ChilliwackBritish Columbia 5.9
- 8VernonBritish Columbia 5.9
- 10SaskatoonSaskatchewan 5.7
- 10TorontoOntario 5.7
- 12SquamishBritish Columbia 5.6
- 13OakvilleOntario 5.5
- 14Sherwood ParkAlberta 5.4
- 15HamiltonOntario 5.3
- 15LondonOntario 5.3
- 15MiltonOntario 5.3
- 15VancouverBritish Columbia 5.3
- 15WindsorOntario 5.3
- 20BurnabyBritish Columbia 5.2
- 20LangleyBritish Columbia 5.2
- 20MississaugaOntario 5.2
- 20NewmarketOntario 5.2
- 20Port CoquitlamBritish Columbia 5.2
- 20SarniaOntario 5.2
- 20St. ThomasOntario 5.2
- 27GuelphOntario 5.1
- 27KitchenerOntario 5.1
- 27Prince GeorgeBritish Columbia 5.1
- 27ReginaSaskatchewan 5.1
- 27RichmondBritish Columbia 5.1
- 27Sorel-TracyQuebec 5.1
- 27Strawberry HillBritish Columbia 5.1
- 34AirdrieAlberta 5.0
- 34BarrieOntario 5.0
- 34Fort St. JohnBritish Columbia 5.0
- 34KamloopsBritish Columbia 5.0
- 34WaterdownOntario 5.0
- 39CoquitlamBritish Columbia 4.9
- 39Fort McMurrayAlberta 4.9
- 39HarewoodBritish Columbia 4.9
- 42Swift CurrentSaskatchewan 4.8
- 42L'Ancienne-LoretteQuebec 4.8
- 44DuncanBritish Columbia 4.7
- 44LethbridgeAlberta 4.7
- 44Medicine HatAlberta 4.7
- 44NanaimoBritish Columbia 4.7
- 44Saint JohnNew Brunswick 4.7
- 44ShawiniganQuebec 4.7
- 50BramptonOntario 4.6
- 50BrossardQuebec 4.6
- 50ChathamOntario 4.6
- 50MontréalQuebec 4.6
- 54AllistonOntario 4.5
- 54Nepeanlow-cost sensorsOntario 4.5
- 56DeltaBritish Columbia 4.4
- 56Grande PrairieAlberta 4.4
- 56St. AlbertAlberta 4.4
- 56St. CatharinesOntario 4.4
- 60CranbrookBritish Columbia 4.3
- 61BellevilleOntario 4.2
- 61DrummondvilleQuebec 4.2
- 61QuébecQuebec 4.2
- 61Rivière-des-Prairies–Pointe-aux-TremblesQuebec 4.2
- 65CornwallOntario 4.1
- 65GranbyQuebec 4.1
- 65LangfordBritish Columbia 4.1
- 65Trois-RivièresQuebec 4.1
- 65West VancouverBritish Columbia 4.1
- 70TerraceBritish Columbia 4.0
- 71KelownaBritish Columbia 3.9
- 71SherbrookeQuebec 3.9
- 73Greater SudburyOntario 3.8
- 73North VancouverBritish Columbia 3.8
- 75North BayOntario 3.7
- 75PeterboroughOntario 3.7
- 75EdmundstonNew Brunswick 3.7
- 78OttawaOntario 3.5
- 78Saint-Jean-sur-RichelieuQuebec 3.5
- 78SydneyNova Scotia 3.5
- 81KingstonOntario 3.4
- 82DartmouthNova Scotia 3.3
- 82Sept-ÎlesQuebec 3.3
- 84North CowichanBritish Columbia 3.2
- 84Sault Ste. MarieOntario 3.2
- 86MonctonNew Brunswick 3.1
- 87FrederictonNew Brunswick 3.0
- 87SaguenayQuebec 3.0
- 89CharlottetownPrince Edward Island 2.9
- 90MiramichiNew Brunswick 2.6
- 91WhitehorseYukon 2.5
- 92Campbell RiverBritish Columbia 2.3
- 92Rouyn-NorandaQuebec 2.3
- 94Gatineaulow-cost sensorsQuebec 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+
All cities in the world, May 2026 · Canada now
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SmogRank, most polluted cities in Canada, PM2.5, May 2026, smogrank.com/ca/history/2026-05 (accessed 2 Oct 2026).
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