Formed in 1957, the Toronto and Region Conservation Authority (TRCA) develops and delivers programs to further the conservation, restoration, development and management of the natural resources within its watersheds. The TRCA is governed by the Ontario Conservation Authorities Act and the Ontario Clean Water Act.

The TRCA is the largest landowner (almost 18,000 hectares) in the GTA region, and it makes its lands available to the community for outdoor and conservation education, recreation and historic site purposes. TRCA’s area of jurisdiction includes 3,467 square kilometres: 2,506 on land and 961 water-based. This area comprises nine watersheds:

  • Carruthers Creek
  • Don River
  • Duffins Creek
  • Etobicoke Creek
  • Mimico Creek
  • Highland Creek
  • Humber River
  • Rouge River
  • Petticoat Creek


TRCA’s jurisdiction also extends into Lake Ontario to a point defined by the Territorial Divisions Act, R.S.O. 1980.
The TRCA is a partnered agency of the municipalities shown below:

  • City of Toronto
  • Regional Municipality of Durham
  • Regional Municipality of Peel
  • Regional Municipality of York
  • Township of Adjala-Tosorontio
  • Town of Mono


Follow this link for information on the Board governance structure for the Toronto and Region Conservation Authority.

The mission of the TRCA is to work with its partners to ensure that the partner municipalities build their environments upon a natural foundation of healthy rivers and shorelines, greenspace and biodiversity, and sustainable communities.

2014 Service Overview

The Toronto and Region Conservation Authority undertakes a diverse set of programs including:

  • Watershed Studies and Strategies
  • Water Risk Management
  • Regional Biodiversity
  • Land Securement and Management
  • Tourism and Recreation
  • Planning and Development Review
  • Education and Outreach
  • Sustainable Communities
  • Corporate Services

The “Living City” is the guiding Strategic Vision Policy for the TRCA. The four pillars of The “Living City” are: Healthy Rivers and Shorelines; Green-space and Biodiversity; Sustainability Communities; and Business Excellence, a green economy and responsive government. TRCA works with its partners to pursue the “Living City” in a way that is appropriate to the context of the modern Toronto region. Projects in the City of Toronto identified as part of the “Living City” include:

  • Ashbridges Bay Erosion Control;
  • Don River Mouth Naturalization and Flood Protection;
  • Gibraltar Point Erosion Control; and
  • Royal Rouge Trail Erosion Control.

For 2014 the TRCA has a gross operating budget of $39 million. Of this, user fees and donations generate $24.2 million in revenues. In 2014 the City of Toronto will contribute $4.5 million to the TRCA through a contribution for Toronto Water and $3.4 million through the property tax supported funding. Provincial grants and subsidies are also used to fund the TRCA.

For 2014 through 2023 the City of Toronto capital budget allocates $106 million to TRCA projects.