Monitoring Air Quality

To support the Air Quality Health Index (AQHI), the Ministry monitors up to 6 common pollutants at each of the 39 stations across the provincial AQHI network, including:

• ozone
• fine particulate matter
• nitrogen dioxide
• sulphur dioxide
• carbon monoxide
• total reduced sulphur compounds

Ontario Air Quality Health Index Monitoring Network

No data available

For current AQHI information, please visit airqualityontario, Environment Canada, or call the AQHI Reporting System line at: (416) 246-0411 in the Toronto area or 1 (800) 387-7768 toll free.