Twinning of the Meadowvale North and Streetsville transmission mains
Project overview
To help make new homes available faster, Peel Region is upgrading important water and wastewater systems to support expected population growth and meet Ontario’s housing goals.
As part of this effort, we’re conducting a Schedule C - Municipal Class Environmental Assessment to explore options for building new large water pipes (called “transmission mains”) on the west side of Mississauga. These upgrades will allow greater volumes of water to be supplied to the growing population in the region.
Project background
The 2 new transmission mains will run alongside the existing transmission mains as “twins”. The 2 transmission mains to be twinned are:
- Streetsville Transmission Main – from Herridge Pumping Station to Streetsville Reservoir.
- Meadowvale North Transmission Main – from Streetsville Pumping Station to Meadowvale North Reservoir.
The study area is shown in this figure.
The project team is assessing different potential routes for the new transmission mains, considering technical feasibility, environmental and community impacts, cost, and public feedback to determine the selected route.
The project started in May 2025. Refer to the Notice of Commencement
Municipal Class Environmental Assessment (MCEA)
This project follows the Municipal Class Environmental Assessment (MCEA) process, which is an approved approach under the Ontario Environmental Assessment Act (1990). The MCEA process is used across Ontario to ensure major infrastructure projects are carefully studied before construction. The process involves assessing different options, identifying possible effects on the community and environment, and determining how to reduce negative impacts.
This project has been identified as a Schedule C project, meaning it has the potential for significant environmental effects and must proceed through the full planning and documentation process. This consists of 5 phases:
- Phase 1: Identify the problem or opportunity.
- Phase 2: Identify and evaluate alternative solutions.
- Phase 3: Identify and evaluate alternative design concepts for the preferred solution.
- Phase 4: Prepare and file the Environmental Study Report (ESR) for a 30-day public review period.
- Phase 5: Project implementation.
The outcome of the evaluation exercise, supporting studies, the decision-making process and public feedback will be documented in a Project File Report.
We value your feedback
Public consultation is critical to the success of the project.
3 Public Information Centres (PICs) will be held in association with the first 3 phases of the EA, and a public review period will occur during Phase 4.
Public Information Centre (PIC) No. 1
PIC No. 1 was held in person on December 4, 2025, at the River Grove Community Centre in Mississauga. The PIC presented the study’s problem/opportunity statement, existing study area conditions, and short-listed routes.
We will be taking feedback on the PIC material until January 19, 2026. Please submit feedback using the link below or contract a member of the project team.
Feedback form - available until January 19, 2026
Contact us
Contact a member of the project team to provide comments, ask questions, receive further information, or to be added to the study’s contact list to receive future notifications directly:
Gareth Clemens
Project Manager, Peel Region
437-788-6195
Dania Chehab
Consultant Project Manager, GHD
647-553-6893
