The following are unofficial data provided by the International St. Lawrence River Board of Control for the benefit of the interested public and other stakeholders.

While every effort is made to ensure its accuracy, the user is cautioned that the data may contain errors or inaccuracies. Official data may be obtained from the U.S. Army Corps of Engineers at http://www.lre.usace.army.mil/. or Environment Canada Water Levels Page at http://www.on.ec.gc.ca/water/levels/intro.html.