In simple terms, a watershed is the area of land that catches rain and snow and drains or seeps into a marsh, stream, river, lake or groundwater. In the Toronto region, all watersheds are river watersheds, with the exception of the waterfront which drains into Lake Ontario.
You're in a watershed right now Where ever you are in the Toronto region, you are sitting on a watershed. Click your location on the map below to discover on which watershed you are situated.