What is the Town doing?


Municipal Office

395 Mulock Drive P.O. Box 328 Station Main, Newmarket, Ontario
L3Y 4X7

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​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​In order to reduce the negative effects of stormwater, towns and cities like Newmarket create control facilities, such as storm sewers and stormwater ponds. Newmarket also takes proactive steps to minimize the pollution of stormwater through street sweeping and catch basin cleaning. The Town maintains more than 225 kilometr​es of storm sewers and over 7,000 catch basins.​

A stormwater management system is essential for maintaining a safe and healthy community by lowering the risk of flooding that can damage property and the environment. ​Newmarket's stormwater projects include​​:

Low Impact Development Policy

The Town of Newmarket recently adopted a Stormwater Management and Low Impact Development Policy. The goal of this policy is to minimize, and ultimately eliminate the adverse effects of stormwater on the built and natural environment. This policy declares that the Lake Simcoe Region Conservation Authority's document entitled "Technical Guidelines for Stormwater Management Submissions", or its successor, as be amended, shall apply to all public and private development and redevelopment within the Town of Newmarket. It includes submission requirements, design criteria, stormwater targets and maintenance requirements.

The objectives are:

  1. To build a resilient community and minimize the impacts of climate change on residents and businesses;
  2. To ensure that the practices which take place within the Town are aligned with the policies, guidelines, subwatershed plans, requirements and legislation of other organizations such as the Lake Simcoe Region Conservation Authority (LSRCA) and the Ministry of Environment and Climate Change (MOECC);
  3. To protect the Town's natural environment and fresh water resources by restoring natural drainage capacity and by maintaining the natural hydrological cycle through the use of Best Management Practices (BMP's), including Low Impact Development (LID);
  4. To relieve pressure on the Town's stormwater infrastructure and the funding required to maintain it;
  5. To enforce requirements for new development and redevelopment within the Town.

To view the full policy please contact:

Engineering Services



Wayne and Waratah Stormwater Management Study

The Town of Newmarket has now completed a Municipal Class Environmental Assessment (EA) Study to develop a stormwater management (SWM)strategy to address flooding concerns in the Wayne Drive and Waratah Avenue Area (See Study Area Map). The EA study has defined existing problems and opportunities, considered and evaluated solutions and identified preferred SWM solutions. The study follows the Master Planning Process of the Municipal Engineers' Association Municipal Class EA Approach #2, which will fulfill the requirements for Schedule B projects.

Two Public Information Centres were held at the Town offices; October 16th, 2016 and May 18th, 2017

The preliminary preferred SWM strategy has identified two Schedule B projects whose requirements are being satisfied under this Master Plan. These projects are described as follows:

Project 1:  Install a berm around Waratah Avenue Channel Outlet with improved inlet control structure; Study Area Map.PNG

Project 2: Construct SWM facility within Philmore Hamilton Park.

A Master Plan Project File Report documenting the planning and decision making process has been prepared and is available for review for 30 calendar days beginning November 9, 2017 and ending December 8, 2017 at the following location during regular business hours:

Town of Newmarket Clerk's Office: 395 Mulock Drive, Newmarket

Interested persons may provide written comments to the Town of Newmarket representative:

Jen Slykhuis, Sr. Environmental Coordinator

395 Mulock Drive, P.O. Box 328, STN Main

Newmarket, Ontario  L3Y 4X7

905-953-5300 ex. 2506



If concerns regarding the Project (i.e Projects 1 and 2 as listed above) remain unresolved after consulting with Town staff, a person can request that the Project be subject to a Part II Order by the Minister of the Environment and Climate Change. Part II Order requests must be written and received by the Minister and the Director, Environmental Approvals Branch of the Ministry of Environment and Climate Change at the following addresses within the 30-day review period from November 9, 2017 to December 8, 2017. A copy of the Part II Order must also be provided to the Town representative listed above.

Minister of the Environment and Climate Change

77 Wellesley Street West, Ferguson Block, 11th Floor, Toronto, ON M7A 2TS

Ministry of the Environment and Climate Change

Director, Environmental Approvals Branch

135 Street Clair Avenue West, 1st Floor, Toronto, ON M4V 1P5

Lions Park Drainage Improvements

The Town of Newmarket has completed a Schedule 'B' Municipal Class Environmental Assessment (EA) study to examine the opportunity to improve surface water drainage and create recreational space within Lions Park as well as wildlife habitat within D'Arcy Creek. Approximately 2 hectares of surrounding land drains into Lions Park, creating flooding issues and unusable recreational space. 

The final design includes the: Rehabilitation of the watercourse including clean out, widening, profile adjustments and riparian buffers. Development of an approximately 2,000 m2 wetland within the west portion of Lions Park including plantings, signage and walkway. Placement of the excavated material within the east portion of the park to reduce flooding. The project is now completed

This project was conducted in partnership with Lake Simcoe Region Conservation Authority and Environment and Climate Change Canada.  

Support was also provided by York Region's Greening Partnership Action Fund and Dufferin Simcoe Land Stewardship Network

CB Shield Catch Basin Project 

As part of its ongoing efforts to adapt to climate change, the Town of Newmarket is conducting a water quality pilot project for stormwater management. The project involves placing a product called "CB Shield" in seven (7) catch basins located on the south side of John Bowser Crescent and Glenway Circle. CB Shield is designed to change the flow of stormwater entering a catch basin to improve the settling of sediment and the phosphorus that is attached to it. The project will test the effectiveness of the CB Shield product and will consist of a monitoring program in partnership with the Lake Simcoe Region Conservation Authority (LSRCA). 

The Town of Newmarket's application of sand for winter road maintenance, along with the accumulation of trash and organic debris such as leaf litter, results in build-up of sediment that washes into the Town's stormwater infrastructure. Sediment and phosphorus make up a significant portion of material that washes into the stormwater system and are two of the major contributors to poor water quality in our stormwater ponds and our lakes and rivers from urban stormwater run-off. The sumps at the bottom of catch basins have a limited sediment storage capacity. As a result, sediments that are resting in the sump can sometimes be disturbed and re-suspended into the stormwater during major rain storms.

The suspended solids can then wash through our storm sewers into ponds or lakes and streams. Each CB Shield monitoring location and adjacent control point will have a measuring device installed by the LSRCA monitoring team to record the accumulation of sediment at each location on a seasonal basis.

Ray Twinney Low Impact Development Retrofit

The Town of Newmarket, Lake Simcoe Region Conservation Authority and Environment and Climate Change Canada have made environmental improvements to the front parking lot at the Ray Twinney Recreation Complex. Improvements include stormwater management works by using low impact development (LID) techniques such as using permeable interlocking pavers in the parking lot and the installation of rain gardens in the median areas. These retrofits will improve downstream water quality and reduce flooding in the Western Creek by allowing water to infiltrate into the ground naturally. There is 500 cubic metres of storage under the parking lot and garden area for rain water. This project is now complete, swing by the Complex to check out the improvements. Before and after photos are highlighted​ below.



Stormwater Management Facility Maintenance Program 

The Town has developed a Stormwater Management Facility (SWMF) Maintenance Program for all Town owned and operated stormwater facilities. The main objective is to perform an inventory and survey of these facilities to complete a detailed SWMF Inventory and Maintenance Needs Plan. The program includes an annual inspection of Town SWMF in order to develop short and long-term maintenance requirements. Maintenance for 2017 is now underway and expected to be completed in November 2017.

Stormwater Charge 

The Town has recently introduced a stormwater management rate. A user rate, based on the amount of hard surfaces a property has, helps fund the three major cost drivers for the service, which are flood prevention, environmental protection, and aging infrastructure. For more information visit the stormwater charge webpage. ​ 

Comprehensive Stormwater Management Master Plan

The Lake Simcoe Protection Plan (LSPP) has identified urban stormwater runoff as a significant source of phosphorus entering Lake Simcoe and its tributaries. As a result the LSPP requires municipalities to prepare and implement a Comprehensive Stormwater Management Mast Plan (CSWMMP). The Town of Newmarket recently completed its Master Plan, which provides an integrated assessment of existing and proposed future conditions with respect to stormwater management within the Town.

The report also details opportunities for improvement and recommendations for future actions. For a copy of the report please contact the Town 905-895-5193.

Low Impact Development: Forest Glen Road 

​The Town of Newmarket, in partnership with the Lake Simcoe Region Conservation Authority, initiated a pilot demonstration project for Low Impact Development (LID) as part of a municipal road improvement project on Forest Glen Road, north of Queen Street. The objective of this project is to implement LID stormwater drainage solutions to improve water quality (including phosphorus removal), reduce erosion at Western Creek, increased infiltration and groundwater recharge, and provide maximized flood control while providing a landscape aesthetic and streetscape element. This project is now complete. 

Learn more about the Low Impact Development on Forest Glen Road by watching the video below:​