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Regional Electricity Planning - York Region 2023

Forecasting and Planning

Regional electricity planning in the GTA North Region is underway. 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 this region’s future electricity needs.

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

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

  • Municipalities including York Region, City of Vaughan, Town of Richmond Hill, City of Markham, Town of Aurora, Town of Newmarket, Township of King, Town of East Gwillimbury, Town of Whitchurch-Stouffville and Town of Georgina
  • Indigenous Communities including 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 and Métis Nation of Ontario
  • Local distribution companies who serve the community including Alectra Utilities Corporation, Newmarket-Tay Power Distribution Ltd. and Hydro One
  • Transmitters
  • Consumers and service providers for the area

Additional details on the IESO’s plans to engage communities and interested parties throughout the process can be found in the Engagement Plan. All comments and enquiries on this engagement can be directed to

York Region Working Group - A Technical Working Group consisting of the local distribution companies in the region, the local transmitter and the IESO will use this regional planning engagement initiative to consider input that will identify and meet local electricity needs. The Working Group consists of representatives from the LDCs in the area – Alectra Utilities Corporation, Newmarket-Tay Power Distribution Ltd., as well as the transmitter Hydro One Networks Inc., and the IESO.

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

Related Information

2020 York Region Integrated Regional Resource Plan (IRRP)

2020 York Region IRRP Appendices

2015 York Region IRRP

2015 York Region IRRP – Appendix

Hydro One’s Needs Assessment – July 2023​

Also see the GTA North (York Region) planning web page

Schedule of Activities



Expected Actions

October 12, 2023

Final GTA North (York Region) Scoping Assessment Outcome Report


October 12, 2023

IESO response to feedback for the Scoping Assessment Webinar


September 26, 2023

Deadline for public comment on draft GTA North (York Region)

Scoping Assessment Outcome Report

Feedback form

Feedback Received:

All feedback to be posted

September 12, 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
  • Communication

Recorded Presentation

September 6, 2023

Draft GTA North (York Region) Scoping Assessment Outcome Report

Draft to be posted for public comment

August 18, 2023

Launch GTA North Region (York Region) Scoping Assessment Engagement