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Looking Back at 20 Years of the IESO Wholesale Electricity Market

April 28, 2022

This Sunday, May 1, 2022 will mark the 20th anniversary of the opening of the wholesale electricity market in Ontario. Establishing wholesale markets was a turning point in the evolution of Ontario’s electricity system that facilitated new ways of meeting changing electricity needs and opened the door to a more dynamic, diverse and cost-effective system.

A lot has happened since 2002. In the intervening years, the IESO has worked closely with stakeholders, communities and other partners to provide a reliable, affordable and sustainable supply of electricity to Ontarians. The diversity of the province’s supply resources has expanded substantially and innovative technologies continue to create new opportunities to reduce costs, improve efficiency and meet emerging needs.

Thank you to sector and market participants, community and Indigenous representatives and others for their ongoing input, feedback, guidance and support. To explore some of the major developments in Ontario’s electricity sector over the past 20 years, please see the overview and video available on the IESO website.

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