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Oakville Water Purification Plant Municipal Class Environmental Assessment

Status: Completed November 2016


Halton Region has completed the Schedule B Class Environmental Assessment study for the capacity increase of the Oakville Water Purification Plant (WPP) located at 21 Kerr Street, Oakville. This project was identified in the Sustainable Halton Water and Wastewater Master Plan (Master Plan), completed in 2011, as part of the preferred water and wastewater servicing strategies for all urban service areas within Halton Region.

The Master Plan recommended that the existing capacity of the Oakville WPP be increased from 109 million litres per day (ML/d) to 130 ML/d to ensure that the growing demand for drinking water within Halton Region for the 2031 planning horizon is met.

The Master Plan also identified the potential for an interrelated project to upgrade the plant intake. The plant is susceptible to raw water quality issues due to interference from Sixteen Mile Creek after rainfall events.

Consultant: GHD Inc., exp Services Inc.

Study Level: Schedule B

The purpose of the Class EA study was to identify a preferred solution to meet the water servicing objectives for the South Halton area in accordance with the Master Plan. The study also investigated potential risks to security of supply including occasional raw water quality issues as the result of Sixteen Mile Creek influences.

The Class EA process includes:

  • Public and review agency consultation
  • An evaluation of alternatives and identification of the preferred solution
  • Preparation of Project File

Notice of Study Commencement: September 4, 2014

Public Information Centre (PIC): June 9, 2016

Project File Report: September 29, 2016

Preferred Solution: The preferred strategy is to achieve the capacity increase through rerating of the plant, including minor in-plant upgrades and implementation of a plant-based solution to address security of supply risks associated with raw water turbidity episodes. This solution has the least impact on the local community, least impact to the natural environment and is the lowest cost alternative.

Tentative Start of Construction: Spring 2018

Regional Contact: