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.
*NEW* 2017 & 2019 High Water Information:
The Board has recently launched a new website page focused on the 2017 and 2019 high-water events:
All high-water related materials, including questions and answers, related reports and videos are now in one place.
This was a recommendation in the Province of Ontario’s Special Advisor’s report on flooding.
Sign-up to receive weekly summaries on Lake Ontario outflows.