SmogRank / Cleaner or dirtier / Canada

Canada: cleaner or dirtier, 2026

In Canada, 115 cities have enough days in both years to compare 2026 so far (1 January to 6 October) with the same days of 2025: 30 got dirtier and 79 cleaner.

The 30 cities that got dirtier, biggest rise first

#	City	2025	2026	Change
1	KamloopsBritish Columbia, Canada	38	56	+5.1 µg/m³+74%
2	CastlegarBritish Columbia, Canada	44	57	+4.6 µg/m³+58%
3	VernonBritish Columbia, Canada	41	54	+3.1 µg/m³+42%
4	CrestonBritish Columbia, Canada	34	51	+3.0 µg/m³+49%
5	HopeBritish Columbia, Canada	31	46	+2.7 µg/m³+48%
6	KelownaBritish Columbia, Canada	34	46	+2.0 µg/m³+32%
7	CranbrookBritish Columbia, Canada	40	51	+1.9 µg/m³+26%
8	AirdrieAlberta, Canada	32	39	+1.2 µg/m³+21%
9	AgassizBritish Columbia, Canada	32	38	+1.1 µg/m³+19%
10	KitimatBritish Columbia, Canada	22	27	+1.0 µg/m³+26%
11	SarniaOntario, Canada	48	52	+1.0 µg/m³+11%
12	ChilliwackBritish Columbia, Canada	32	37	+1.0 µg/m³+18%
13	LondonOntario, Canada	49	52	+0.9 µg/m³+10%
14	ChathamOntario, Canada	41	46	+0.9 µg/m³+12%
15	St. ThomasOntario, Canada	44	49	+0.8 µg/m³+10%
16	HarewoodBritish Columbia, Canada	25	29	+0.8 µg/m³+18%
17	BathurstNew Brunswick, Canada	29	32	+0.5 µg/m³+10%
18	GuelphOntario, Canada	44	47	+0.4 µg/m³+5%
19	Campbell RiverBritish Columbia, Canada	18	20	+0.4 µg/m³+12%
20	AbbotsfordBritish Columbia, Canada	30	32	+0.4 µg/m³+7%
21	BrantfordOntario, Canada	50	51	+0.3 µg/m³+3%
22	WindsorOntario, Canada	54	54	+0.2 µg/m³+2%
23	NanaimoBritish Columbia, Canada	25	26	+0.2 µg/m³+4%
24	North VancouverBritish Columbia, Canada	23	24	+0.2 µg/m³+5%
25	LangfordBritish Columbia, Canada	26	26	+0.1 µg/m³+2%
26	BurnabyBritish Columbia, Canada	28	28	+0.1 µg/m³+2%
27	DuncanBritish Columbia, Canada	28	28	+0.1 µg/m³+2%
28	LangleyBritish Columbia, Canada	28	28	+0.1 µg/m³+2%
29	Strawberry HillBritish Columbia, Canada	27	28	+0.1 µg/m³+2%
30	DeltaBritish Columbia, Canada	23	24	+0.1 µg/m³+2%

The 79 cities that got cleaner, biggest fall first

#	City	2025	2026	Change
1	Prince AlbertSaskatchewan, Canada	65	40	−9.2 µg/m³−56%
2	Fort McMurrayAlberta, Canada	63	38	−8.5 µg/m³−55%
3	SaskatoonSaskatchewan, Canada	58	38	−6.0 µg/m³−47%
4	Grand CentreAlberta, Canada	56	33	−5.9 µg/m³−50%
5	EstevanSaskatchewan, Canada	60	49	−5.3 µg/m³−38%
6	Grande PrairieAlberta, Canada	55	36	−4.5 µg/m³−41%
7	ReginaSaskatchewan, Canada	55	37	−4.4 µg/m³−40%
8	St. AlbertAlberta, Canada	53	38	−3.5 µg/m³−34%
9	EdmontonAlberta, Canada	58	52	−3.3 µg/m³−26%
10	Prince GeorgeBritish Columbia, Canada	53	38	−3.1 µg/m³−31%
11	Swift CurrentSaskatchewan, Canada	52	37	−3.0 µg/m³−31%
12	Sherwood ParkAlberta, Canada	52	40	−2.6 µg/m³−27%
13	Rouyn-NorandaQuebec, Canada	40	26	−2.5 µg/m³−35%
14	Fort St. JohnBritish Columbia, Canada	44	32	−2.2 µg/m³−28%
15	CornwallOntario, Canada	47	35	−2.1 µg/m³−25%
16	NepeanOntario, Canada	55	51	−2.0 µg/m³−18%
17	Fort SaskatchewanAlberta, Canada	54	49	−1.9 µg/m³−18%
18	QuesnelBritish Columbia, Canada	52	43	−1.9 µg/m³−20%
19	SaguenayQuebec, Canada	41	31	−1.8 µg/m³−24%
20	Parry SoundOntario, Canada	43	33	−1.8 µg/m³−23%
21	Sorel-TracyQuebec, Canada	52	43	−1.8 µg/m³−19%
22	MontréalQuebec, Canada	47	37	−1.7 µg/m³−20%
23	EdsonAlberta, Canada	44	35	−1.6 µg/m³−20%
24	BécancourQuebec, Canada	44	35	−1.6 µg/m³−20%
25	Medicine HatAlberta, Canada	47	38	−1.6 µg/m³−19%
26	Trois-RivièresQuebec, Canada	46	37	−1.5 µg/m³−18%
27	OttawaOntario, Canada	41	33	−1.4 µg/m³−19%
28	GranbyQuebec, Canada	44	36	−1.4 µg/m³−18%
29	BarrieOntario, Canada	50	42	−1.4 µg/m³−16%
30	PeterboroughOntario, Canada	41	33	−1.4 µg/m³−19%
31	Rivière-des-Prairies–Pointe-aux-TremblesQuebec, Canada	43	36	−1.4 µg/m³−18%
32	Drayton ValleyAlberta, Canada	48	40	−1.4 µg/m³−16%
33	SmithersBritish Columbia, Canada	32	25	−1.3 µg/m³−22%
34	North BayOntario, Canada	37	31	−1.1 µg/m³−16%
35	QuébecQuebec, Canada	44	38	−1.1 µg/m³−14%
36	SherbrookeQuebec, Canada	38	32	−1.1 µg/m³−16%
37	Sept-ÎlesQuebec, Canada	39	33	−1.1 µg/m³−16%
38	LethbridgeAlberta, Canada	45	39	−1.1 µg/m³−14%
39	TorontoOntario, Canada	52	47	−1.1 µg/m³−11%
40	Labrador CityNewfoundland and Labrador, Canada	29	24	−0.9 µg/m³−17%
41	SquamishBritish Columbia, Canada	37	32	−0.9 µg/m³−13%
42	BrossardQuebec, Canada	43	38	−0.9 µg/m³−12%
43	BramptonOntario, Canada	46	42	−0.8 µg/m³−10%
44	Greater SudburyOntario, Canada	37	32	−0.8 µg/m³−12%
45	DrummondvilleQuebec, Canada	40	36	−0.7 µg/m³−10%
46	BellevilleOntario, Canada	41	37	−0.7 µg/m³−10%
47	St. CatharinesOntario, Canada	44	40	−0.7 µg/m³−9%
48	WhistlerBritish Columbia, Canada	31	27	−0.7 µg/m³−12%
49	Saint-Jean-sur-RichelieuQuebec, Canada	34	30	−0.7 µg/m³−11%
50	KingstonOntario, Canada	38	35	−0.6 µg/m³−9%
51	North CowichanBritish Columbia, Canada	22	18	−0.6 µg/m³−15%
52	EdmundstonNew Brunswick, Canada	38	34	−0.6 µg/m³−9%
53	ShawiniganQuebec, Canada	43	40	−0.6 µg/m³−8%
54	NewmarketOntario, Canada	50	47	−0.6 µg/m³−7%
55	CalgaryAlberta, Canada	54	52	−0.6 µg/m³−6%
56	KentvilleNova Scotia, Canada	24	22	−0.5 µg/m³−11%
57	Port AlberniBritish Columbia, Canada	40	37	−0.5 µg/m³−7%
58	MississaugaOntario, Canada	44	41	−0.5 µg/m³−6%
59	CharlottetownPrince Edward Island, Canada	23	20	−0.5 µg/m³−12%
60	Williams LakeBritish Columbia, Canada	38	36	−0.4 µg/m³−6%
61	AllistonOntario, Canada	42	40	−0.4 µg/m³−5%
62	OakvilleOntario, Canada	47	46	−0.3 µg/m³−4%
63	West VancouverBritish Columbia, Canada	25	23	−0.3 µg/m³−7%
64	FrederictonNew Brunswick, Canada	28	26	−0.3 µg/m³−6%
65	Saint John EastNew Brunswick, Canada	28	27	−0.3 µg/m³−6%
66	Saint JohnNew Brunswick, Canada	28	27	−0.3 µg/m³−6%
67	GibsonsBritish Columbia, Canada	32	31	−0.3 µg/m³−5%
68	Sault Ste. MarieOntario, Canada	42	41	−0.3 µg/m³−4%
69	L'Ancienne-LoretteQuebec, Canada	48	46	−0.3 µg/m³−3%
70	MiltonOntario, Canada	51	49	−0.3 µg/m³−3%
71	Port WallaceNova Scotia, Canada	21	19	−0.2 µg/m³−5%
72	DartmouthNova Scotia, Canada	21	19	−0.2 µg/m³−5%
73	MiramichiNew Brunswick, Canada	26	25	−0.2 µg/m³−4%
74	MonctonNew Brunswick, Canada	27	26	−0.2 µg/m³−4%
75	VancouverBritish Columbia, Canada	30	29	−0.2 µg/m³−4%
76	SydneyNova Scotia, Canada	23	22	−0.2 µg/m³−5%
77	Red DeerAlberta, Canada	51	51	−0.1 µg/m³−1%
78	TerraceBritish Columbia, Canada	26	26	−0.1 µg/m³−2%
79	HamiltonOntario, Canada	49	49	−0.1 µg/m³−1%

Means in US AQI over the days a city was measured in both years, the same calendar days each year; a city needs 55% of the days paired, and at least 30. The change is in µg/m³ and per cent. How we compare.

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Updated 2026-10-07 12:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.