The Lake Simcoe Region Conservation Authority

Riverine Flood Status
Lake Simcoe Shoreline Status
Low Water Status

Policies and Guidelines

Policies and Guidelines

Regulation Implementation Guidelines

Note: ​Our Regulation Implementation Guidelines have been updated and approved by the Board of Directors on June 23, 2023.

These Regulation Implementation Guidelines (formerly Watershed Development Guidelines) have been developed to help enhance consistency and administrative decision-making for the implementation of Lake Simcoe Region Conservation Authority’s Development, Interference with Wetlands and Alteration to Shorelines and Watercourses Regulation (Ontario Regulation 179/06) made under the Conservation Authorities Act. 

These Guidelines provide general approaches to the processing of applications under Ontario Regulation 179/06. They are the operating principles or the general norm for the implementation of the Regulation.

Stormwater​ Management Guidelines

This document will provide guidance to municipalities, the development community and their consultants regarding the stormwater management and Erosion/Sediment Control requirements of the Lake Simcoe Region Conservation Authority in accordance with the Lake Simcoe Protection Plan and Provincial Policy Statement.

Download the Stormwater Management Submission Guidelines >>

Comprehensive Stormwater Management Master Plan

The Lake Simcoe Protection Plan sets out specific requirements for the management of stormwater in existing and planned settlement areas, through the preparation of comprehensive Stormwater Management Master Plans (CSWM-MP). This document provides direction to municipalities on how to prepare and implement CSWM-MPs for settlement areas located in the Lake Simcoe watershed, in accordance with the intent of Policy 4.5-SA of the Lake Simcoe Protection Plan.

Download the Comprehensive Stormwater Management Master Plan >>

Hydrogeological Assessment Submission

This guidance document has been developed by the Conservation Authorities Geoscience Group which is made up of Conservation Authority hydrogeologists. The main purpose is to provide information and guidance material to Conservation Authorities, their municipalities and consultant hydrogeologists related to hydrogeological assessment requirements that can be used to ensure comprehensive evaluations of potential impacts associated with development on natural ecological features and functions that are supported by groundwater resources.

Download the Hydrogeological Assessments Submission Guidelines >>

Permit Application Hearing Guidelines

The Conservation Authorities Act (Section 28) requires the applicant be party to a hearing by the local Conservation Authority Board, for an application to be refused or approved with conditions. Further, where staff are recommending that a permit be revoked under Ontario Regulation 179/06 a hearing will be held to provide the applicant with the oppor​tunity to show cause why the permit should not be cancelled. 

Download the Permit Application Hearing Guidelines >> 

Offsetting Plans and Policies

Phosphorus Offsetting

As new urban growth occurs, phosphorus loads will be controlled to meet pre-development phosphorus loading levels. Any remaining stormwater phosphorus that cannot be controlled would require an “offset” to achieve pre-development phosphorus loading levels.

Download the Phosphorus Offsetting Policy >> ​

Ecological Offsetting

Development proposals and infrastructure projects subject to Planning Act or Environmental Assessment Act approvals that will result in the loss of wetland and/or woodland natural heritage features, despite having followed the mitigation hierarchy, will be required to compensate for the loss of these features. Learn more about the Ecological Offsetting Policy. 

Download the Ecological Offsetting Policy >>

Water Budget Policy

Recognizing the importance of recharge areas to sustaining a healthy watershed, the Lake Simcoe Protection Plan includes a number of policies to help identify and protect SGRAs and ESGRAs.  ​

The approach taken within the LSPP follows three basic steps: 1) define and identify SGRAs/ESGRAs; 2) develop guidance for their protection and restoration, and 3) incorporate policies into municipal official plans to protect, improve and restore. This document will expand on the three points above by developing a Water Budget Offsetting Policy for those areas where it is demonstrated that the post-development infiltration is unable to match the pre-development infiltration volume and an infiltration deficit remains in the post development scenario.​​

Download the Water Balance Offsetting Policy >>​ 

Lake Simcoe Climate Data: A Reference Document to Support the Completion of Water Balance Assessments ​

This document aims at providing a standard dataset for land development applicants and their consultants to use when completing water balance analysis. Qualified Persons should exercise professional judgment and flexibly to adapt the data provided when considering specific site conditions and when new information or data becomes available.

Download the Reference for Water Balance Assessments >>

Important Notice:

​​​​​​Bill 23

With the passing of Bill 23, More Homes Built Faster Act, there are several changes that have impacted our permitting role as well as our work in planning and development reviews.

For clarification on these roles, please review Current Impacts of Bill 23​, including the Areas of Review Chart. 

Office Hours

Our new public office hours will be Tuesdays, Wednesdays and Thursdays from 8:30 am to 4:30 pm.
We highly recommend making an appointment in advance to ensure there is staff available to help you.  

Our team continues to work remotely. We are available via email, video or voice conference using Microsoft Teams or ZOOM. Please reach out to your planning or regulations contact by email about your file.

phone icon   Who to Contact 

Permits & Regulations
1-800-465-0437 Toll free

Submit electronic applications to​

form icon   ​​General inquiries can be sent to:

Jessica Lim at​

Regulations: ​

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