Region Overview

The Greater Toronto Area (GTA) East Region comprises the municipalities of Pickering, Ajax, Whitby, Oshawa, and parts of Clarington and other parts of Durham Region. It is divided into two sub-regions:

Pickering-Ajax-Whitby Sub-region: This area covers most of the City of Pickering, Town of Ajax, part of the Town of Whitby, and part of the Townships of Uxbridge and Scugog. 

Oshawa-Clarington Sub-region: This area encompasses the City of Oshawa, part of the Municipality of Clarington, and part of the Township of Scugog.

Region's Local Distribution Companies
  • Elexicon Energy Inc.
  • Oshawa PUC Networks Inc.
  • Hydro One Networks Inc. (Distribution)

Map: GTA East

Current Status

The second Regional Planning cycle for this region was completed with publishing of the RIP report in February 2020. It is expected that the Third Regional Planning cycle will be initiated in 2024 or earlier with the completion of the Needs Assessment report.

Accomplishment (Most Recent Shown First) Status Completion Date
Regional Infrastructure Planning (2nd Cycle) Completed February 2020
Needs Assessment (2nd Cycle) Completed August 2019
Regional Infrastructure Planning Completed January 2017
Integrated Regional Resource Planning - Pickering-Ajax-Whitby Completed June 2016
​Local Planning - Wilson and Thornton TS Capacity Completed May 2015
​Scoping Assessment Completed December 2014
​Needs Assessment Completed August 2014

*The completed reports are available below (Based on 2nd cycle NA, it was determined no further regional co-ordination was required).

Relevant Documents

Regional Infrastructure Planning (RIP)
Name Completion Date
GTA East RIP - Report (2nd Cycle) February 2020
GTA East RIP - Report January 2017

Integrated Regional Resource Planning (IRRP)
Name Completion Date
Pickering-Ajax-Whitby Sub-region IRRP – Report June 2016
Pickering-Ajax-Whitby Sub-region IRRP – Appendices June 2016

Local Planning (LP)
Name Completion Date
Local Planning Report - Wilson Thornton - Final  May 2015
Needs Assessment (NA) & Scoping Assessment (SA)
Name Completion Date
GTA East NA – Report (2nd Cycle) August 2019
GTA East SA - Report December 2014
GTA East NA - Report August 2014