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            The Independent Electricity System Operator (IESO) works at the heart of Ontario's power system. The IESO delivers key services across the electricity sector including: managing the power system in real-time, planning for the province's future energy needs, enabling conservation and designing a more efficient electricity marketplace to support sector evolution. 

            Coronavirus (COVID-19) update

            Effective March 12, the IESO is not accepting visitors at its three facilities, loted in Mississauga, Oakville and downtown Toronto. This step is being taken as a preution to maintain regular business operations during the coronavirus (COVID-19) outbreak. Where possible, meetings and events will be conducted through webinars or conference lls.

            The IESO has already moved its external stakeholder engagement activities, including Regional Electricity Forums, the Stakeholder Advisory Committee, Marketplace Training and the Technil Panel, to conference lls or webinars. Registration information for these meetings has been updated on the website to reflect this change.

            Thank you for your patience and co-operation. Please contact customer.relations@ if you have any questions.

            Updated: March 17, 2020

            Stay Connected


            Save on Energy

            Powering Tomorrow

            New Episode of the Powering Tomorrow Podst

            On the latest episode of the podst, we go beyond Ontario’s borders to get the North Ameri-wide picture of the rapid transformation happening to power grids across the continent. Jim Robb, President and CEO of the North Amerin Electric Reliability Corporation discusses the benefits of having an interconnected grid, and how the North Amerin grid of the future will be more digitized, distributed and derbonized.


            Listen to episode here.

            Annual Planning Outlook Sector Participants

            Meeting Ontario’s future electricity system needs

            A 20-year forest for Ontario's electricity system, the newly released Annual Planning Outlook includes electricity demand projections and a resource adequacy assessment, identifies the province’s energy and pacity needs, and addresses transmission planning and other considerations, including sector emissions.


            See the highlights or read the full report.

            Reliability Outlook Sector Participants

            Reliability Outlook released

            Ontario’s electricity system remains stable and reliable but the medium- and long-term impacts of COVID-19 on demand for electricity are yet unknown. The IESO is closely monitoring the situation in collaboration with its industry partners to ensure that we are collectively prepared to respond to changing grid conditions.

            Read the Reliability Outlook for the period from April 2020 to September 2021.

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            Kilowatt Way

            Whether you live in an apartment or a house – four quick questions will reveal how you use electricity and show you ways to become more energy efficient.

            Visit Kilowatt Way