Annual Air Pollutant Statistics

This dataset provides a summary of annual air pollution statistics from 1995 to the current available year for six air pollutants:

Carbon Monoxide
Oxides of Nitrogen (NO, NO2, NOx)
Ozone
Fine Particulate Matter (PM2.5)
Sulphur Dioxide
Total Reduced Sulphur

The annual statistics include percentiles, mean, maximums and also indicate the number of times an air monitoring station exceeded an Ontario annual ambient air quality criteria, where applicable. This information is also available in the annual Air Quality in Ontario Reports. The hourly air pollutant concentration data is posted in near real time on the Air Quality Ontario website: http://www.airqualityontario.com/

Ministry contact: Environment, Conservation and Parks

Additional information

Tags: air quality air quality

air pollution air pollution

annual data summary annual data summary

ozone ozone

nitrogen dioxide nitrogen dioxide

nitric oxides nitric oxides

PM2.5 PM2.5

sulphur dioxide sulphur dioxide

carbon dioxide carbon dioxide

total reduced sulphur total reduced sulphur

O3 O3

NO2 NO2

NO NO

NOx NOx

SO2 SO2

CO CO

TRS TRS

equity equity
Source URL/Address: http://www.airqualityontario.com/
Maintainer branch: Environmental Monitoring and Reporting Branch
Last Validated Date: January 19, 2024
Update frequency: Yearly