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December 5, 2025

Independent Electricity System Operator (IESO)

The Independent Electricity System Operator is responsible for operating the electricity market and directing the operation of the bulk electrical system in Ontario.
GE Hitachi and Ontario Power Generation
Ontario Environmentalists Slam New Nuclear Units

Ontario environmental groups panned the Canadian government’s inclusion of small modular reactors among infrastructure projects selected to receive fast-track regulatory treatment, saying renewables would be a far cheaper way to expand generation capacity.

Ontario Energy Board Market Surveillance Panel State of the Market Report 2023
Ontario Market Monitor Revamps Techniques for IESO Nodal Market
Ontario’s energy regulator is learning new ways to identify inefficiencies and malign behavior under IESO’s Market Renewal Program.
Enbridge Gas Distribution and Storage
Ontario Govt. Moves to Tighten Grip on OEB, IESO
Ontario’s Progressive Conservative government continues to put its stamp on the province’s energy policy, proposing legislation that would add “economic growth” to the missions of IESO and the Ontario Energy Board.
IESO
Stakeholders Frustrated by Lack of Details on Toronto DSM Study

IESO officials say they will release more information on how the ISO constructed its study of the potential for incremental energy savings in Toronto after stakeholders complained they lack enough details to comment meaningfully.

IESO
Ontario Nodal Market Nearing ‘Steady State’ After Nearly 4 Months
IESO officials say they are shifting from correcting implementation problems to seeking structural improvements in their nodal market.
IESO
Ontario to Expand Industrial Energy Efficiency Program

IESO will expand its industrial demand-side management program, increasing funding and allowing both larger and smaller participants than currently permitted.

IESO
IESO Seeks to Fill Growing Regulation Needs
IESO will seek to fill its growing need for regulation services through competitive bids but will resort to bilateral procurements if there is insufficient interest.
IESO
IESO Sees Improved ‘Trust’ Ratings in Survey
IESO saw “across the board improvement” in its 2024 stakeholder and community engagement survey.
IESO
IESO Seeks Feedback on Revised Storage Model
IESO opened discussions on new rules for storage facilities and hybrid resources that will enable the provision of regulation service.
IESO
Canadian Utilities Push Action on Net-zero Goals, Tax Credits
Canada’s utilities are encouraged by the country’s new government but say legislation to fast-track high-priority infrastructure projects doesn't address needs for permitting reform and more flexible clean energy targets and investment tax credits.

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