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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:

  1. Identify the problem and/or opportunity
  2. Identify and evaluate alternative solutions
  3. Identify and evaluate alternative design concepts to the preferred solution
  4. Prepare an Environmental Study Report
  5. 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: January 6, 2020

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

Henderson Sewage Pumping Station Environmental Assessment and Open House

York is initiating a Schedule B Municipal Class Environmental Assessment (Class EA) study to determine the preferred approach to redirecting the wastewater flows from the Henderson Drive area in the Town of Aurora.

View final Notice of Completion and Project File — July 11, 2019

Aurora,Environmental Assessments,Municipal Class,EA,study,schedule,construction,water,wastewater,roads,project The Regional Municipality of York en-US

East Gwillimbury

Upper York Sewage Solutions
Proposes a Water Reclamation Centre with associated infrastructure including an outfall to the East Holland River. York-Durham Sewage System Modifications are now part of a Declaration Order.
Status: Submitted to MOECC July 25, 2014.

Mount Albert Water Supply Upgrades

Study to identify improvements to the water supply system and water quality in the community of Mount Albert.

Share your thoughts — we’re listening. Register for the mailing list to receive project updates.

East Gwillimbury,Environmental Assessments,Municipal Class,EA,study,schedule,construction,water,wastewater,roads,project The Regional Municipality of York en-US

Georgina

No current projects

Georgina,Environmental Assessments,Municipal Class,EA,study,schedule,construction,water,wastewater,roads,project The Regional Municipality of York en-US

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.

View Open House #2 Display Boards | Share your feedback —  February 28, 2019

View notice of Open House — February 14, 2019

View the public notice — November 15, 2018

Share your thoughts — we’re listening. You are invited to register for the mailing list to recieve project updates.

King,Environmental Assessments,Municipal Class,EA,study,schedule,construction,water,wastewater,roads,project The Regional Municipality of York en-US

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: 2020

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.
Study Complete: 2018

Cedar / Red Cedar Avenue
Environmental Assessment Study
Estimated Study Completion: To be determined

Kennedy Road from Steeles Avenue to Major Mackenzie Drive
Environmental Assessment Study
Construction Starts: 2023 to beyond 2029

McCowan Road from Steeles Avenue to Major Mackenzie Drive
Environmental Assessment Study
Construction Starts: 2026 to beyond 2029


Markham,Environmental Assessments,Municipal Class,EA,study,schedule,construction,water,wastewater,roads,project The Regional Municipality of York en-US

Newmarket

Upper York Sewage Solutions
Proposes a Water Reclamation Centre with associated infrastructure including an outfall to the East Holland River. York-Durham Sewage System Modifications are now part of a Declaration Order.
Status: Submitted to MOECC July 25, 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

 

Newmarket,Environmental Assessments,Municipal Class,EA,study,schedule,construction,water,wastewater,roads,project The Regional Municipality of York en-US

Richmond Hill

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: 2020

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.
Study Complete: 2018

Cedar / Red Cedar Avenue
Environmental Assessment Study
Estimated Study Completion: February 2020

Highway 404 Midblock Crossing North of 16th Avenue
Construction of a new bridge over Highway 404 to link Orlando Avenue with Markland Street
Construction Starts: 2022

Leslie Street from 19th Avenue 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.

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

Richmond Hill,Environmental Assessments,Municipal Class,EA,study,schedule,construction,water,wastewater,roads,project The Regional Municipality of York en-US

Vaughan

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 Weston Road to Highway 7
Environmental Assessment Study
Estimated Study Completion: Fall 2020

Teston Road IEA from Keele Street to Bathurst Street
Individual Environmental Assessment Study
Construction Starts: 2027

West Vaughan Sewage Servicing
  • 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

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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.

*A person may request the Minister of the Environment, Conservation and Parks issue a Part II Order. As of July 1, 2018, a Part II Order Request Form must be used to request a Part II Order. The Part II Order Request Form is available online on the Forms Repository website by searching “Part II Order” or “012-2206E” (the form ID number).


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.

Whitchurch-Stouffville,Environmental Assessments,Municipal Class,EA,study,schedule,construction,water,wastewater,roads,project The Regional Municipality of York en-US

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Environmental Assessment Study Main The Regional Municipality of York en-US photo of green pine trees behind a grass hill that is in front of a pond. 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 and expansions as well as water and wastewater projects.

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