2025 Global Review +: New Upgrades for Toronto Wastewater Plant
Work aims to update treatment system and lower carbon footprint
Humber Treatment Plant first opened in 1960.
The City of Toronto awarded GHD a contract to serve as primary design consultant in upgrading Toronto's Humber wastewater treatment plant–North Plant.
The project will use a construction manager-at-risk delivery model, the first time the approach is being used from project onset. It was chosen to promote collaboration, innovation and cost controls, according to the firm. Work will involve secondary treatment system modernizations that include infrastructure replacements and lowered plant greenhouse gas emissions.
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$20T
Average annual return by 2070 on climate transition investment
Source: UN Environmental Program Global Environment Outlook 7
GHD’s role covers the entire duration of the project and beyond, and entails selecting the CMAR contractor, providing preliminary and detailed design, coordinating permitting and developing a guaranteed maximum price assessment and construction phase services, including post-construction support.
Subconsultants include wastewater advisory firm All Things Collaborative Delivery; Cobalt Water Global, a climate tech start-up focused on water sector decarbonization; project management firm MGAC; wastewater treatment consultant JenTech Inc.; and engineering school Polytechnique Montreal.
Humber Treatment Plant, which serves roughly 662,000 people according to the most recent city wastewater treatment plant report, is the second largest of its four plants. It was opened in 1960.
The work on North Plant is part of an ongoing series of upgrades for the 125-mgd plant under municipal utility Toronto Water's capital plan—including previous work on South Plant, with Black & Veatch providing design and construction management services and Alberici Constructors as general contractor.
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