Air Quality Stations

The air monitoring stations measure up to 6 common pollutants like: * ground-level ozone * fine particulate matter * nitrogen dioxide * carbon monoxide * sulphur dioxide * total reduced sulphur compounds The Ministry of the Environment, Conservation and Parks continually monitors air quality across Ontario. We use this information to: * inform the public about outdoor ambient air quality through the Air Quality Index (AQI) and Smog Advisory program * assess Ontario's air quality and evaluate long-term trends * identify areas where pollutant levels are exceeded * identify the origins of pollutants * develop air policy * provide quantitative measurements to reduce specific pollution sources * determine the significance of pollutants from long-range transports and their effects * provide air quality researchers with data to link environmental and human health effects to air quality

Data and Resources

Additional Info

Field	Value
Last Updated	April 17, 2026, 21:49 (UTC)
Created	April 17, 2026, 21:49 (UTC)
contact_person	{"en": "Government of Ontario; Government of Ontario; Environment, Conservation and Parks", "fr": "Gouvernement de l'Ontario; Gouvernement de l'Ontario; Environment, Conservation and Parks"}
criticality_level	[]
data_dictionary	unknown,unknown,unknown
geographic_scope	[]
open_canada_collection	fgp
open_canada_date_published	2020-01-11 00:00:00
open_canada_keywords	{"en": ["air", "EMRB", "air monitoring network", "air quality stations", "ambient air", "equity", "Government information"], "fr-t-en": ["air", "DSE", "réseau de surveillance de l'air", "stations de qualité de l'air", "air ambiant", "équité", "Information gouvernementale"]}
open_canada_subject	["economics_and_industry"]
sensitivity_level	unrestricted
title_fr	Stations sur la qualité de l’air
update_frequency	P1Y