Municipal Class Environmental Assessment Studies
Mid-Halton Wastewater Treatment Plant Upgrades
Details
Purpose
To identify the preferred upgrades for the Mid-Halton Wastewater Treatment Plant (WWTP) that will increase treatment capacity from 125 million litres per day (ML/d) to 195 ML/d to service and support growth by 2031.
Scope
During this study, the project team will:
- review options to upgrade the WWTP to service growth;
- evaluate alternative concepts for achieving the required wastewater treatment capacity;
- assess the impacts and identify mitigation measures;
- consult the public and review agencies; and
- prepare the Environmental Study Report for review and approval.
This study will be carried out in accordance with Schedule C of the Municipal Class Environmental Assessment (MCEA), (October 2000, as amended 2007, 2011, 2015, 2023 and 2024), which is an approved process under the Ontario Environmental Assessment Act.
Public Information Centre #1
An online Public Information Centre took place between June 26 and July 25, 2025. The presentation and transcript are available to view in the documents section below.
Public Information Centre #2
Our second online Public Information Centre took place between November 6 to December 5, 2025. To learn about the study findings and share your feedback, please visit the project consultation page.