• cyanobacteria bloom in Missisquoi Bay

    IJC Releases Recommendations to Protect Lake Champlain-Missisquoi Bay and Lake Memphremagog from Harmful Algal Blooms

    The IJC released its final report to the Governments of Canada and the United States.

  • Moses-Saunders Dam

    Background Paper Answers Key Questions on 2019 Lake Ontario and St. Lawrence River Flooding

    In an easy-to-read background paper on High Water in 2019, the International Lake Ontario-St. Lawrence River Board responds to the call for more accessible information.

  • 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.

Proposed Nutrient Water Quality Objectives for the Red River

Thank you for your comments on the proposed nutrient concentration objectives and nutrient load targets for the Red River at the boundary between the United States and Canada. The public comment period closed on March 28, 2020.