Great Lakes watershed locator

Search the map to find which Great Lakes Basin watershed corresponds to the selected location.

After searching, you can also drag the map marker within the map to select a new location.



Magenta line fill polygon Connecting Channel Watersheds
Great Lakes-St. Lawrence River Basin
Yellow outline polygon Lake Erie Watershed
Pink outline polygon Lake Huron Watershed
Blue outline polygon Lake Superior Watershed
Purple outline polygon St. Lawrence River Watershed
Green outline polygon Lake Ontario Watershed
Updated: January 23, 2020