International Lake Ontario-St. Lawrence River Board
The International Lake Ontario-St. Lawrence River Board ensures that outflows from Lake Ontario meet the requirements of the International Joint Commission's Orders of Approval. The Board also has responsibilities to communicate with the public.
Watch the Great Lakes webinar video
The Great Lakes Levels Councils held a webinar on August 30 and 31, 2022.
Latest News Releases
Visual History of the Project
A visual history of how the St. Lawrence River was transformed and the regulation of Lake Ontario began
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Mandate
Learn about the Board's responsibilities
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Reports
Read the Board's latest reports
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News Releases
Read all of the Board's news releases
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Current Conditions
Learn about the current water levels conditions
A visual tour of the Lake Ontario-St. Lawrence River System
The hydrologic features, control structures and varied interests as they relate to outflow regulation in the Lake Ontario-St. Lawrence System
Videos
Tri-Board Tribune
Read the latest edition of the Tri-Board Tribune, a Great Lakes Water Levels Boards collaboration.
Weekly Summary
Sign up to receive weekly summaries on Lake Ontario outflows.