Jurisdiction and Participating Municipalities
TRCA's area of jurisdiction includes 3,467 square kilometres: 2,506 on land and 961 water-based. This area is comprised of nine watersheds:
- Carruthers Creek,
- Don River,
- Duffins Creek,
- Etobicoke and
- Mimico Creek,
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- Highland Creek,
- Humber River,
- Rouge River,
- Petticoat Creek,
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TRCA's jurisdiction also extends into Lake Ontario to a point defined by the Territorial Divisions Act, R.S.O. 1980.
TRCA has six participating or member municipalities:
- City of Toronto
- Regional Municipality of Durham
- Regional Municipality of Peel
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- Regional Municipality of York
- Township of Adjala-Tosorontio
- Town of Mono.
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