The Lake Simcoe Region Conservation Authority

Riverine Flood Status
Lake Simcoe Shoreline Status
Low Water Status

Retrofitting Stormwater Ponds


To reduce the impact of stormwater runoff from urban areas by retrofitting existing stormwater management facilities. Addressing stormwater contributes to protect and/or improve the water quality and quantity of Lake Simcoe and its tributaries.


Retrofit Stormwater Management Facilities to:

  • Reduce stormwater runoff to pre-development conditions as close to the source as possible
  • Prevent erosion and reduce phosphorus loads to Lake Simcoe and its tributaries
  • Contribute to the protection or enhancement of water quality and quantity within the Lake Simcoe watershed
  • Recognize stormwater retrofit projects as a means to achieving the overall phosphorus water quality target

Eligible Projects

  • Retrofitting of existing stormwater ponds to provide water quality and quantity control

Project Details

The following minimum criteria must be met for a project to be approved:

  • Projects on public lands should have a with a written commitment from the public landowner to enter into an Agreement to include the following: inspect and maintain the facility to the satisfaction of the Conservation Authority, and if applicable, the amended Environmental Compliance Approval (ECA) and to identify the project within an established asset management database and provide inspection and maintenance records to the Conservation Authority upon request
  • Evidence that all previously implemented low impact development projects in the subject municipality are being inspected and maintained in accordance with their Agreement (if applicable)
  • On private lands should have a written commitment from the private landowner to enter into a Conservation Agreement to include the following: the protection, inspection, and maintenance of the facility in perpetuity to the satisfaction of the Conservation Authority and if applicable, the amended Environmental Certificate of Approval (ECA)
  • All projects will follow the most current Conservation Authority’s  Technical Guidelines for Stormwater Management Submissions
  • For Recharge, potential funding is based on the net (post minus pre-retrofit) annual infiltration based on the most recent board approved rate​
  • For Phosphorus reduction, potential funding is based on the net (post minus pre-retrofit) annual phosphorus reduction or more recent board approved rate
  • One tool only must be selected and used either:
  1. Ministry Environment, Conservation and Parks Phosphorous Budget Tool. For a copy of this Phosphorus Budget Tool, please e-mail
  2. STEP-Water Low Impact Development Treatment Train Tool​ for phosphorus calculations. No mixing of the phosphorus tools, loading rates, or removal rates will be permitted

What costs are covered?

  • Permits
  • Professional design fees
  • Material and labour associated with the approved project
  • Construction c​osts

What isn't covered?

  • Maintenance of stormwater practices (storm water pond, low impact development, and oil and grit separator clean outs, etc.)
  • Taxes
  • Machinery or equipment owned and used by the applicant, family dependents or the applicant’s business
  • Labour of applicant, family dependents or the applicant’s business
  • If you have an outstanding violation with the Conservation Authority, you may not be eligible for funding
  • Work that proceeds prior to funding approval does not qualify for funding assistance

How to Apply

Complete the Landow​ner Information Form and Project Profile Form to submit an application. Only complete applications will be considered for funding assistance.

Please contact the Manager of Restoration Services Christa S​harp​​ to verify program eligibility and to answer any questions/concerns you may have about the program and/or the application process. This is a voluntary program and all calls are confidential.

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