Stormwater charge credit program

The stormwater charge credit program can reduce the stormwater charge for businesses or multi-residential properties. You can apply for a new credit, update an approved credit, or renew an existing credit.

The property owner must be able to show how stormwater best management practices (BMPs) were designed and implemented to reduce impacts to the City’s stormwater system. This can typically be done by controlling the quantity and quality of stormwater leaving your property.

Categories and evaluation criteria

If you are an owner of a multi-residential or non-residential property, you can apply for credits in the four categories below.

To apply, you must provide:

  • documentation that outline the details of your management best practices
  • technical reports and/or certification that showcase their performance as required (refer to the application guide)

For more information, review the following application guide.

Manage stormwater runoff rates and reduce the potential and severity of flooding on downstream land. This could include drainage inlet controls, underground chamber systems, stormwater basins or ponds.

Remove solids and other contaminants from stormwater runoff. This could include a stormwater pond, oil and grit separators or green infrastructure.

Reduce the amount of stormwater runoff entering the City’s stormwater system. This could include green infrastructure such as bioretention, infiltration, permeable pavements or rainwater harvesting systems.

Implementation of a variety of operations and maintenance practices that support stormwater management. This could include activities such as:

  • Sustainable landscaping
  • Education programs for employees
  • Paved area sweeping
  • Salt management plan
  • Pollution prevention measures or plans

Stormwater credit amounts

The total stormwater credit for a single property cannot exceed 50%.

Category Evaluation criteria Maximum credit amount
Peak flow reduction Aligned with the City’s current development requirements at a watershed or sub-watershed level. Up to 40%
Water quality treatment Impervious area that is directed to approved on-site quality control BMPs. Up to 30%
Runoff volume reduction Capture of first 15 millimetres of rainfall during a single rainfall event. Up to 30%
Operations and activities Develop and implement one or more of the eligible practices. Up to 20%

How to apply

You can apply for a new credit, update or renew an existing credit online or by mail. It will take a minimum of four to six weeks for your application to be processed.

For detailed information about the application requirements and process, refer to the Stormwater Charge Credit Application Guide.

You’ll need to provide:

  • The property’s full address
  • Your business contact information and email
  • Engineering reports and drawings that show how your property implemented stormwater management best practices as required (refer to the Guidance Manual)
  • Additional supporting documentation requested by the City

Reports and drawings must be prepared by a Professional Engineer registered in Ontario and qualified in municipal engineering and stormwater management.

Check request status Apply for stormwater credit online

Complete the Stormwater Charge Credit Application Form and mail it to:

City of Mississauga
Transportation and Works
Environmental Services
300 City Centre Drive
Mississauga, Ontario L5B 3C9

Greening Corporate Grounds program

Learn more about stormwater management improvements that can qualify for a stormwater credit and support services through Credit Valley Conservation’s Greening Corporate Grounds program.

What happens next

When reviewing your application, we may contact you to conduct a site inspection of your property.

Once your application has been processed, you’ll receive a notice of approval.

Stormwater credits will be in effect for up to five years or as otherwise specified at
the time of credit approval. Credits will expire if they’re not renewed prior to the expiration date.

Contact us

If you have any questions about the credits or the application process, please email us at