• Picture of sunset over Lake Okanagan with view of a dock

    Boundary Waters Treaty

    The 1909 Boundary Waters Treaty  provides principles for Canada and the United States to follow in using the waters they share. 

  • Over One Hundred Years of Protecting Shared Waters

    The International Joint Commission prevents and resolves disputes between the United States of America and Canada under the 1909 Boundary Waters Treaty.


International Watersheds Initiative


Transboundary Waters

Transboundary Watersheds

Select a watershed (basin) within the map below to learn more about the IJC’s water-related activities.


Learn about Progress under the Great Lakes Water Quality Agreement and share your views!       

The Great Lakes Water Quality Agreement calls for the US and Canada to convene a Great Lakes Public Forum once every three years to discuss the state of the lakes and progress made under the Agreement, and to provide an opportunity for public input. The next Great Lakes Public Forum will be held in Milwaukee, Wisconsin at the Hilton Milwaukee City Center Hotel on June 17-19, 2019. Everyone is welcome to attend.

After this Forum, the IJC will hold a series of public meetings around the Great Lakes basin in June – October to hear from everyone on their perspective of the health of the lakes. Locations and dates will be announced early in 2019, and we look forward to your participation.