Map of Ontario showing 21 electricity planning regions

Area Overview

The Toronto electricity planning region includes the City of Toronto as well as a small number of distribution feeders that supply customers in the City of Mississauga and City of Pickering. Indigenous communities in or near the region or that have an interest in the area are Mississaugas of the Credit First Nation, Six Nations of the Grand River, Haudenosaunee Confederacy Chiefs Council, York Region Métis Council, and the Huron Wendat of Wendake, Quebec.

The local distribution companies providing service to customers in the region include:

  • Alectra Utilities
  • Elexicon Energy Inc.
  • Hydro One Networks Inc.
  • Toronto Hydro Electric System Limited

Community Engagement

The IESO engages with local and regional communities to seek input to help inform planning activities.

Regional Planning Progress Update

A new regional electricity planning cycle has begun for the Toronto Region that will examine local growth and future electricity needs.

The IESO has developed a Scoping Assessment Outcome Report and Terms of Reference that identifies the need for a more comprehensive planning approach and development of an integrated regional resource plan (IRRP) for the Toronto region. It also includes the terms of reference that outlines the timing and details of the work to develop the electricity plan. This follows the completion of the Needs Assessment published by Hydro One in December 2022. 

Find out more about reliability in Toronto and meeting the city's electricity needs.


Key Resources

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.