Environmental Assessment Study
A Municipal Class Environmental Assessment (EA) is a five-phase study identifying the potential positive and negative effects of municipal infrastructure projects like road improvements as well as water and wastewater projects. The Ministry of the Environment, Conservation and Parks and the Municipal Engineers Association, in accordance with the Environmental Assessment Act, require that Regional and municipal governments perform a Class EA study before a project can begin.
The five phases of a Class EA are:
- Identify the problem and/or opportunity
- Identify and evaluate alternative solutions
- Identify and evaluate alternative design concepts to the preferred solution
- Prepare an Environmental Study Report
- Implementation
Depending on the EA Schedule, a project may not require going through all phases of the EA Process prior to implementation. Refer to Frequently Asked Questions for the list of Class EA Schedules.
The Class EA process includes an investigation and evaluation of the impacts on the natural, social and technical environment. A Class EA evaluates the impacts on natural and cultural features, infrastructure, traffic patterns, local residents and businesses in the community as well as existing and future land uses.
Current Class Environmental Assessment Studies
Last updated: January 2025
Please select a municipality to view current Environmental Assessment projects.
Aurora
Yonge Street Aquifer Well Capacity Restoration
In 2016, The Regional Municipality of York completed a Schedule B Municipal Class Environmental Assessment (Class EA) study to identify a recommended plan to restore the full permitted capacity of York Region’s wells within the Yonge Street Aquifer.
Since the completion of the Class EA, additional updates were recommended to improve the overall distribution system water quality, requiring an addendum to the 2016 Project File.
East Gwillimbury
Mount Albert Water Supply Upgrades
Study to identify improvements to the water supply system and water quality in the community of Mount Albert.
- Notice of Completion and Project Files - January 14, 2021
- Online Open House presentation
- Frequently asked questions - August 31, 2020
- Community Update and Survey Records - August 12, 2020
- Frequently asked questions - December 17, 2019
- Notice of Commencement - July 4, 2019
Yonge Street Aquifer Well Capacity Restoration
In 2016, The Regional Municipality of York completed a Schedule B Municipal Class Environmental Assessment (Class EA) study to identify a recommended plan to restore the full permitted capacity of York Region’s wells within the Yonge Street Aquifer.
Since the completion of the Class EA, additional updates were recommended to improve the overall distribution system water quality, requiring an addendum to the 2016 Project File.
Georgina
No current projects.
King
Water and Wastewater Servicing in the Nobleton Community
York Region is initiating a Schedule C Municipal Class Environmental Assessment (Class EA) study to identify long-term water and wastewater capacity servicing options for the Nobleton community that support growth and optimize the use of existing Regional infrastructure.
Markham
Warden Avenue and Kennedy Road from Major Mackenzie Drive to Elgin Mills Road
- Notice of Completion - October 13, 2023
- Notice of Environmental Assessment Study
- Notice of Commencement - November 25, 2021
Construction Starts: 2023 to beyond 2029
Estimated Study Completion: December 2023
Newmarket
Yonge Street Aquifer Well Capacity Restoration
In 2016, The Regional Municipality of York completed a Schedule B Municipal Class Environmental Assessment (Class EA) study to identify a recommended plan to restore the full permitted capacity of York Region’s wells within the Yonge Street Aquifer.
Since the completion of the Class EA, additional updates were recommended to improve the overall distribution system water quality, requiring an addendum to the 2016 Project File.
Richmond Hill
Elgin Mills Road from Yonge Street to East of Newkirk Road
- Notice of Environmental Assessment Study
- Notice of Commencement - November 25, 2021
Estimated Study Completion: December 2023
Vaughan
Langstaff Road from Weston Road to Highway 7
Study Completion: January 2022
Teston Road IEA from Highway 400 to Bathurst Street
Estimated Study Completion: Winter 2024
Whitchurch-Stouffville
No current projects.
Accessible formats or communication supports are available upon request by contacting:
York Region, Public Works
Phone: 1-877-464-9675 ext. 75000
TTY: 1-866-512-6228
Email: transportation@york.ca
Planned Construction Schedule Map
View York Region’s Construction Schedule Map for planned and approved infrastructure projects.
Related Resources
- Environmental Assessment Study
- Environmental Health
- Forests
- Garbage and Recycling
- Request Environmental Site Assessment Data for a Property
-
Water and Wastewater
- Beach Water Testing
- Construction Design Guidelines and Standards
- Drinking Water Quality and Monitoring
- Drinking Water Source Protection
- Duffin Creek Water Pollution Control Plant
- Inflow and Infiltration
- Mobile Drinking Water Trailer
- Municipal Water Supply
- Outdoor Water-Use Bylaws
- Private Well Water Testing
- Sewer Use Permits
- Small Drinking Water System Operators
- Student Water Conservation Programs
- Upper York Sewage Solutions
- Wastewater Collection and Treatment
- Water and Wastewater Construction Projects
- Water and Wastewater Master Plan