Regional Planning - GTA West 

Regional electricity planning in the Greater Toronto Area (GTA) West region is underway. This engagement initiative will provide interested parties with an opportunity to offer input for consideration into the elements of the regional planning process.

Regional electricity plans take 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 this region’s future electricity needs.

All interested parties are invited to participate in this engagement initiative and may include but are not limited to:

  • Municipalities of Brampton, South Caledon, Halton Hills, Mississauga, Milton, Oakville and Burlington, and the Regional Municipalities of Halton and Peel
  • Indigenous communities including the Grand River Métis Council, Six Nations of the Grand River and Mississaugas of the New Credit
  • Local distribution companies (LDCs) who serve the community including Alectra Utilities, Burlington Hydro Inc., Halton Hills Hydro Inc., Hydro One Networks Inc., Milton Hydro Distribution Inc. and Oakville Hydro Electricity Distribution Inc.
  • Transmitters
  • Consumers and service providers for the area

GTA West Scoping Study Team- A Scoping Study Team consisting of the six LDCs in the region, the local transmitter and the IESO will use this regional planning engagement initiative to consider input to develop Scoping Assessment Outcome Report for the region. 

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

Also see the regional planning webpage for GTA West

Schedule of Activities



Expected Actions

August 8, 2019

Final GTA West Scoping Assessment Outcome Report

Final version posted following a two-week comment period


August 8, 2019

GTA West Scoping Assessment Outcome Report – IESO responses to Public Comments



July 8, 2019

Deadline for public comment on draft GTA West Scoping Assessment Outcome Report


June 24, 2019

Public webinar


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

Webinar recording

Seek input on draft Scoping Assessment Outcome Report


June 20, 2019

Draft GTA West Scoping Assessment Outcome Report

  • Communication

Draft posted for public comment

June 6, 2019

Launch GTA West Scoping Assessment engagement