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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 and the Municipal Engineers Association, in accordance with the EA Act (2000), 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 to go 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 to natural and cultural features, infrastructure, traffic patterns, local residents and businesses in the community and existing and future land uses.
View information about getting an Environmental Site Assessment Report for a property.
Current Environmental Assessments
Last updated: April 6, 2018
Please select a municipality to view current Environmental Assessment projects.
Accessible formats or communication supports are available upon request at 1-877-464-9675.
Aurora
Yonge Street Aquifer Well Capacity Restoration Schedule B Class EA study
The Towns of Aurora, East Gwillimbury, and Newmarket are serviced by a blend of surface water from Lake Ontario and groundwater from 18 municipal wells within the Yonge Street Aquifer.
Estimated study completion: End 2016/early 2017
East Gwillimbury
Upper York Sewage Solutions
Proposes a Water Reclamation Centre with associated infrastructure including an outfall to the East Holland River as well as proposed York-Durham Sewage System Modifications.
Status: Submitted to MOECC, pending minister approval 2016
Yonge Street Aquifer Well Capacity Restoration Schedule B Class EA study
The Towns of Aurora, East Gwillimbury, and Newmarket are serviced by a blend of surface water from Lake Ontario and groundwater from 18 municipal wells within the Yonge Street Aquifer.
Estimated study completion: End 2016/early 2017
Georgina
No current projects
King
No current projects
Markham
16th Avenue from Woodbine Avenue to York/Durham Line
This study investigates future long term needs and improvements for 16th Avenue to better serve transit, pedestrians, cyclists, and motorists. The study considers prior studies and official plans and effects on the environment.
Estimated Study Completion: 2018
16th Avenue from Yonge Street to Woodbine Avenue
This study investigates future long term needs and improvements for 16th Avenue to better serve transit, pedestrians, cyclists, and motorists. The study considers prior studies and official plans and effects on the environment.
Estimated Study Completion: 2018
Kennedy Road from Steeles Avenue to Major Mackenzie Drive
Environmental Assessment Study
Construction Starts: 2023 to beyond 2026
Environmental Assessment Study
Construction Starts: 2026 to beyond 2027
Road Crossing of Highway 404 between Major Mackenzie Drive and Elgin Mills Road
This study investigates how a new road crossing of Highway 404 will better serve transit, pedestrians, cyclists, and motorists and manage increasing traffic resulting from continued growth in York Region. The study considers prior studies and official plans and effects on the environment.
Estimated Study Completion: 2017
Newmarket
Upper York Sewage Solutions
Proposes a Water Reclamation Centre with associated infrastructure including an outfall to the East Holland River as well as proposed York-Durham Sewage System Modifications.
Estimated Study Completion: spring 2014
Yonge Street Aquifer Well Capacity Restoration Schedule B Class EA study
The Towns of Aurora, East Gwillimbury, and Newmarket are serviced by a blend of surface water from Lake Ontario and groundwater from 18 municipal wells within the Yonge Street Aquifer.
Estimated study completion: End 2016/early 2017
Richmond Hill
16th Avenue from Yonge Street to Woodbine Avenue
This study investigates future long term needs and improvements for 16th Avenue to better serve transit, pedestrians, cyclists, and motorists. The study considers prior studies and official plans and effects on the environment.
Estimated Study Completion: 2018
Leslie Street from Elgin Mills Road to Stouffville Road
Environmental Assessment Study
Construction Starts: To be determined
Oak Ridges Air Management Facility
Environmental Assessment Study
York Region has conducted air quality studies, air flow modelling, monitoring and sampling programs to assess odour in relation to Regional sewers in the community of Oak Ridges, in the Town of Richmond Hill. As a result of these studies, York Region has identified the need for an Air Management Facility (AMF) with odour control technology for the Oak Ridges community.
- View Notice of Completion including final report for submission available for comment
- View Notice of Open House #2
- View Open House #2 display boards
- View Notice of Assessment and Open House #1
- View the Open House display boards
Road Crossing of Highway 404 between Major Mackenzie Drive and Elgin Mills Road
This study investigates how a new road crossing of Highway 404 will better serve transit, pedestrians, cyclists, and motorists and manage increasing traffic resulting from continued growth in York Region. The study considers prior studies and official plans and effects on the environment.
Estimated Study Completion: 2017
Stouffville Road Class EA between Yonge Street and Highway 404
This study is to review the current and future transportation needs for Stouffville Road between Yonge Street and Highway 404, including a potential jog elimination at Yonge Street.
Estimated Study Completion: 2017
Yonge Street / Highway 7 Regional Centre Water and Wastewater Servicing Environmental Assessment
Schedule B Class EA study to conduct a detailed capacity assessment study and Environmental Assessment to identify the preferred water and wastewater servicing strategy in the Town of Richmond Hill - Langstaff gateway. The study will also identify the location of a future well by groundwater exploration works.
Study Completion: March 2015
Vaughan
Dufferin Street from Langstaff Road to Teston Road
Environmental Assessment Study
Construction Starts: Beyond 2027
Northeast Vaughan Water and Wastewater Servicing Schedule B Class EA Study
Will identify the preferred water and wastewater servicing solution to meet the future growth demands in the Northeast Vaughan area to the year 2051.
Estimated Study Completion: 2018
Langstaff Road from Highway 400 to Highway 7
Environmental Assessment Study
Major Mackenzie Drive from McNaughton/Avro Road to Keele Street
Environmental Assessment Study
Construction Starts: To be determined
Major Mackenzie Drive from Highway 400 to Jane Street
Environmental Assessment Study
Construction Starts: To be determined
Teston Road IEA from Keele Street to Bathurst Street
Environmental Assessment Study
Construction Starts: 2027
- The 14 kilometre sewer starts at the Kleinburg WPCP and follows Highway 27 south to:
- Rutherford Road, then westerly to Huntington Road
- Highway 7, then east to Wallace Street (just west of Islington Avenue)
- along rail and utilities corridor, ending at the Humber Sewage Pumping Station
- Upgrades, expansion and increased capacity are planned of for the existing Humber Sewage Pumping Station (SPS) - Improvements will include:
- upgraded emergency power generation
- odour control, surge control (as required)
- and a deeper wet well
Recent News: View the Public Notice - Filing of Addendum
Description: This new trunk sanitary sewer and pump station upgrades will facilitate growth in the West Vaughan area to 2051
Completion Date: Q2 2017
Whitchurch-Stouffville
Ballantrae Water - Long-term Water Supply
Schedule ‘B’ Class Environmental Assessment (Class EA) study to better understand if the existing water supply and storage capacity in the Ballantrae-Musselman Lake area will meet the long-term water needs of the community.
- October 5, 2017 View Notice of Study Completion — Report on review for 30 days
- April 24, 2017 Public Consultation Centre presentation material
- Public Consultation Centre Comment Form
- Notice of Public Consultation Centre #2 April 24, 2017
- November 21, 2016 Public Consultation Centre presentation material
- Public Consultation Centre open house notice
Stouffville Long-term Water Supply and Servicing
To better understand the impacts and requirements of an increase in water supply and storage capacity, York Region is conducting a Municipal Class Environmental Assessment (Class EA). The goal is to review the long-term water supply and storage needs for the community of Stouffville water system and the needs of York Region.
- Open house #1 display boards
- Open house: Tuesday, November 23, 2017
Related Resources
- Environmental Assessment Process Flowchart
- Environmental Site Assessment Report
- Road Construction Schedule
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