• Image of St. Croix River

    Virtual Public Meeting - December 2, 2020

    The International St. Croix River Watershed Board invites you to attend a virtual meeting with the Board on December 2nd at 6pm Eastern (7pm Atlantic).

  • Home on shoreline of Upper St. Lawrence River in Brockville, Ontario, near the end of St  Paul Street. Photo date was May 27, 2019.

    Great Lakes-St. Lawrence River Shoreline High Water Impacts Questionnaire

    Have you been directly impacted by recent high water levels along the Great Lakes and St. Lawrence River shoreline?

  • A Visual Tour of the System

    The hydrologic features, control structures and varied interests as they relate to outflow regulation in the Lake Ontario-St.Lawrence System


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.

St. Mary Canal Update

The St. Mary and Milk Rivers, located in Montana and Alberta, are connected by a canal to benefit water users in both countries. On May 17 a concrete drop structure collapsed on the canal stopping flows from the St. Mary from reaching the Milk River. Repair work got underway June 17 and will continue through the summer. The Province of Alberta is posting updates on the situation online.