News Releases

While Lake Ontario remains above long-term average, regulated outflows will remain as high as feasible based on river conditions. As a result, residents around Lake St. Lawrence are being warned to expect both extreme high and low water levels this winter, as the Board implements a winter deviation…

The International Lake Ontario – St. Lawrence River Board (Board) announced today that, in directing Lake Ontario outflows, it has been given the ability to continue deviating from the flow specified by Plan 2014.

To provide the highest attainable relief to all interests, both upstream and downstream of the Moses-Saunders Dam, outflows remain at record-high rates for this time of year, eclipsing the outflows released at this same time in any other years dating back to 1900.

Due to the declining Lake Ontario level combined with extraordinarily high outflows still being released through Moses-Saunders Dam, the forebay upstream of the dam has seen a significant sustained drop in water levels, making it extremely challenging to haul-out boats that would normally be…
Lake Ontario levels reached 75.50 m (247.7 ft) and the record outflows of 10,400 m3/s (367,270 cubic feet per second) were reduced to 10,110 m3/s (357,000 cubic feet per second) at 12:01AM on August 21, 2019. 

Water levels on Lake Ontario have begun to decline more rapidly in recent days due to a combination of continued record-high outflows, declining inflows from Lake Erie and generally drier weather across the basin. 

Lake Ontario water levels continue to decline slowly as the Board is maintaining record outflows of 10,400 m3/s (367,270 cubic feet per second). 

Water levels are declining throughout the system as warmer, drier weather and record Lake Ontario outflows of 10,400 m3/s (367,270 cubic feet per second) continue. 

Water levels are expected to decline throughout the system this week as drier conditions are forecast and record Lake Ontario outflows of 10,400 m3/s (367,270 cubic feet per second) continue.  At its meeting on June 28th, the Board reached consensus to maintain the current…

The Board is doing everything possible to provide all possible relief to Lake Ontario and upper St. Lawrence River residents, while considering impacts throughout the system.