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Regional Electricity Planning - Toronto

Forecasting and Planning

Regional electricity planning is underway for the Toronto region. This engagement initiative will provide interested parties with an opportunity to offer input for consideration during the regional planning process.

Regional electricity plans take up to a 20-year outlook on every region in the province. The planning process provides an opportunity for communities to tell the IESO about anticipated needs and priorities, and to contribute to the development of the options for meeting a region’s future electricity needs.

Interested parties in this engagement initiative include but are not limited to:

  • Municipalities including the City of Toronto, City of Mississauga and City of Pickering
  • Indigenous communities that may be potentially impacted or may have an interest based on treaty territory, traditional territory or traditional land uses:
    • Alderville First Nation
    • Chippewas of Beausoleil First Nation
    • Chippewas of Georgina Island First Nation
    • Chippewas of Rama First Nation
    • Curve Lake First Nation
    • Haudenosaunee Confederacy Chiefs Council c/o Haudenosaunee Development Institute
    • Hiawatha First Nation
    • Mississaugas of Scugog Island First Nation
    • Mississaugas of the Credit First Nation
    • Six Nations of the Grand River
    • Métis Nation of Ontario  
  • Local distribution companies (LDCs)
  • Transmitters
  • Local residents and businesses in the area 

All interested parties are invited to participate in this engagement initiative.

Toronto Region Working Group - The Technical Working Group consists of the IESO as the lead, the local transmitter (Hydro One Networks Inc.), and the LDC (Toronto Hydro – Electric System Limited). The Technical Working Group will use this engagement initiative to incorporate input while developing the IRRP.

All comments and enquiries in this engagement initiative can be directed to

Documents referenced on this page, but not posted, can be obtained by contacting with a link to the web page that lists the document and advise whether it needs to be provided in an accessible format. Please allow a minimum of one business day for a response.

Also see the regional planning webpage for Toronto

Schedule of Activities

Date Materials Expected Actions

May 7, 2024

Deadline for public comment on Public Webinar #1

Feedback Received:


April 16, 2024

Public Webinar #1

Presentation: Overview of preliminary regional demand forecasts and draft engagement plan.

Recorded Presentation

April 2023

IESO's response to supplementary feedback


March 21, 2023

Final Toronto Scoping Assessment Outcome Report

Final version posted

March 21, 2023

IESO response to feedback for the Scoping Assessment Webinar


March 2, 2023

Deadline for public comment on draft Toronto Region Scoping Assessment Outcome Report

Feedback Received:

Supplementary Feedback Received:

All feedback to be posted

February 16, 2023

Public Webinar


  • Overview of the regional electricity planning process in Ontario
  • Update on planning activities underway in the region
  • Overview of the Scoping Assessment
  • Next steps

Recorded Presentation

February 14, 2023

Draft Toronto Region Scoping Assessment Outcome Report

Draft posted for public comment

February 2, 2023

Launch Toronto Scoping Assessment Engagement