Pollutant concentrations for June 3, 2026, 1:00 pm EDT

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Pollutant concentrations for June 3, 2026, 1:00 pm EDT

Station	O3 (ppb)	PM2.5 (µg/m3)	NO2 (ppb)	SO2 (ppb)	CO (ppm)
Barrie	31	7	1.5
Belleville	42	6	1.4
Brampton	42	5	1.2
Brantford	42	6	0.8
Burlington	36	6	6.7
Chatham	42	5	3.4
Cornwall	45	7	1.1
Dorset	44	4
Grand Bend	41	5	1.3
Guelph	41	5	1.7
Hamilton Downtown	39	6	2.2	0.3	0.12
Hamilton Mountain	43	5	2.2	1.2
Hamilton West	39	8	4.1
Kingston	37	6	1.8
Kitchener	41	5	1.8
London	40	6	0.5
Milton	44	5	0	0.4
Mississauga	43	5	1.4
Newmarket	43	6	1.1
North Bay	40	7	0.2
Oakville	40	5	1.2
Oshawa	42	9	5.6
Ottawa Downtown	41	6	1.6
Parry Sound	38	6	1.1
Peterborough	39	5	0.8
Port Stanley	44	7	2.4
Sarnia	45	6	2.7	0.1
Sault Ste. Marie	45	5	3.2	0.2
St. Catharines	39	5	1.2
Sudbury	N/A	N/A	N/A	N/A
Thunder Bay	33	8	2.5
Tiverton	42	5
Toronto Downtown	32	11	15.3
Toronto East	36	6	5.3
Toronto North	41	5	2	0
Toronto West	39	5	7.2	0.1	0.12
Windsor Downtown	50	6	5.3	0.9	0.18
Windsor West	47	7	7.6	5

Order by station location (east to west)

Note: 
Ontario 1-hour AAQC for O₃ = 80 ppb
Ontario 1-hour AAQC for NO₂ = 200 ppb
Ontario 1-hour AAQC for SO₂ = 40 ppb
Ontario 1-hour AAQC for CO = 30 ppm

Note: The pollutant concentrations on this web page are based on automatically polled data and have not undergone final verification.

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