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Air Quality Ontario

Toronto Downtown: station information

Saturday, December 6, 2025, 11:00 pm

Toronto Downtown Air Monitoring Station

Photo: Toronto Downtown Ambient Air Monitoring Site

Map of Ontario with Toronto Downtown
Station data for Toronto Downtown
Station information
Station name: Toronto Downtown
Address: 55 John St.
Latitude: 43.645451
Longitude: -79.3891
Station type: Urban
Height of air intake: 3 m
Elevation ASL: 85 m
Pollutants measured: O3, PM2.5, NO2
Measured pollutants at Toronto Downtown
Pollutant Measured 1-hour
concentration
O3 17 ppbOzone [O3]graph
PM2.5 7 µg/m3Fine Particulate Matter [PM2.5]graph
NO2 16.2 ppbNitrogen Dioxide [NO2]graph
Ontario 1-hour AAQC for the measured pollutants
Pollutant Ontario
1-hour AAQC
O380 ppb
NO2200 ppb

Note: N/A (not available) denotes invalid or missing data.

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