York Region Sewage Works Project
The Regional Municipalities of York and Durham are working together to carry out the York Region Sewage Works Project, a long-term wastewater infrastructure project across the Towns of East Gwillimbury, Newmarket, Aurora, Ajax and the Cities of Richmond Hill, Markham and Pickering.
As required by the Supporting Growth and Housing in York and Durham Regions Act, 2022, the York Region Sewage Works Project will increase the existing York Durham Sewage System, including new or expanded wastewater sewers, pumping stations and enhancements to the Duffin Creek Water Pollution Control Plant on the shore of Lake Ontario in the City of Pickering. Durham Region supports proposed work in the City of Pickering as part of the project.
About the project
Project Updates
- Public Notice - October 17, 2024
- Notice of Field Studies – September 20, 2024
- Public Notice – November 3, 2023
- Public Notice – July 20, 2023
Project Report
York Region and Durham Region submitted the York Region Sewage Works Project Report outlining infrastructure components and costs, impacts to the environment and how those impacts will be mitigated to the Minister of the Environment, Conservation and Parks, in accordance with the Act.
- Cover Page and Table of Contents
- Chapter 1 Introduction and Background
- Chapter 2 Confirmation and Description of Components
- Chapter 3 Design Basis
- Chapter 4 Infrastructure Located in East Gwillimbury
- Chapter 5 Infrastructure Located in Newmarket and Aurora
- Chapter 6 Leslie Street Trunk Sewer and Yonge Street Sewer Rehabilitation
- Chapter 7 Markham Collector Twinning
- Chapter 8 Primary Trunk Twinning
- Chapter 9 Duffin Creek Water Pollution Control Plant Expansion and Upgrades
- Chapter 10 Duffin Creek Water Pollution Control Plant New Outfall
- Chapter 11 Implementation Plan
- Chapter 12 Conclusion
- Appendix A Chapter 4 Drawings
- Appendix B Chapter 5 Drawings
- Appendix C Chapter 6 Drawings, CI-D019 – CI-D021
- Appendix C Chapter 6 Drawings, CI-D022 – CI-D024
- Appendix D Chapter 7 Drawings
- Appendix E Chapter 8 Drawings
Project Maps
Accessible formats or communication supports are available upon request.
Supporting Growth and Housing in York and Durham Regions Act, 2022
On November 28, 2022, the Ontario government passed the Supporting Growth and Housing in York and Durham Regions Act, 2022.
The Act mandates York Region change from the previously proposed Lake Simcoe watershed solution, also known as Upper York Sewage Solutions, to a Lake Ontario solution that will pump, move and treat wastewater at the Duffin Creek Water Pollution Control Plant in Durham Region.
The Act requires York Region prepare a Project Report outlining:
- Infrastructure components
- Impacts to the environment and how those impacts will be mitigated
- Impacts to Aboriginal or treaty rights and how those impacts will be mitigated
- Approvals and permits required
Infrastructure components in the Project Report are exempt from the Environmental Assessment Act, 2023.
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