How is PM2.5 monitored in Ontario?

In 2002, Ontario was the first province in Canada to introduce monitoring of PM_2.5 to the Air Quality Index. The ministry reported real-time PM_2.5 with the Thermo Scientific TEOM 1400AB/SES until December 31, 2012. Continuous PM_2.5 monitoring technologies have evolved dramatically over the last decade. The network is now reporting real-time PM_2.5 concentrations using Thermo Scientific SHARP 5030, an approved Class III Federal Equivalent Method designated by the United States Environmental Protection Agency in 2009. Ontario evaluated the SHARP monitor starting in 2009, and adopted this method in 2012 in concurrence with Environment Canada. In 2013, the SHARP monitors were deployed across Ontario’s AQI network.