Lake Ontario Outflow Changes


Outflows from Lake Ontario are established on a weekly basis by the International Lake Ontario - St. Lawrence River Board in accordance with the current regulation plan and the International Joint Commission's Orders of Approval. The table below displays the outflow changes that have occurred this year. All flows are reported in cubic metres and feet per second.

DATE HOUR/ FROM/DE    TO/À   
(YYYY-MM-DD) HEURE (m3/s) (ft3/s) (m3/s) (ft3/s)
2019-04-15 1401 8,000 282,500 7,600 268,400
2019-04-15 0001 8,400 296,600 8,000 282,500
2019-04-14 1201 8,710 307,600 8,400 296,600
2019-04-13 0001 8,680 306,500 8,710 307,600
2019-04-06 0001 8,620 304,400 8,680 306,500
2019-03-26 0001 8,820 311,500 8,620 304,400
2019-03-23 0001 8,680 306,500 8,820 311,500
2019-03-16 0001 8,670 306,200 8,680 306,500
2019-03-09 0001 8,700 307,200 8,670 306,200
2019-02-27 1901 8,600 303,700 8,700 307,200
2019-02-26 1601 8,500 300,200 8,600 303,700
2019-02-21 1401 8,400 296,600 8,500 300,200
2019-02-17 1201 8,300 293,100 8,400 296,600
2019-02-16 1201 8,100 286,000 8,300 293,100
2019-02-14 1201 7,800 275,500 8,100 286,000
2019-02-12 1601 8,100 286,000 7,800 275,500
2019-02-11 1601 8,300 293,100 8,100 286,000
2019-02-10 1201 8,000 282,500 8,300 293,100
2019-02-09 1201 7,730 273,000 8,000 282,500
2019-02-07 1501 7,600 268,400 7,730 273,000
2019-02-03 1101 7,860 277,600 7,600 268,400
2019-02-02 0001 7,470 263,800 7,860 277,600
2019-01-30 0001 7,200 254,300 7,470 263,800
2019-01-28 1301 6,900 243,700 7,200 254,300
2019-01-27 1301 6,700 236,600 6,900 243,700
2019-01-23 1601 6,400 226,000 6,700 236,600
2019-01-20 1901 6,230 220,000 6,400 226,000
2019-01-16 1701 6,500 229,500 6,230 220,000
2019-01-14 1601 6,300 222,500 6,500 229,500
2019-01-13 1601 6,700 236,600 6,300 222,500
2019-01-12 1601 7,100 250,700 6,700 236,600
2019-01-11 1701 8,540 301,600 7,100 250,700
2019-01-05 0001 8,380 295,900 8,540 301,600

To view outflow change records from previous years, please use the links below:

Flow Changes - 2018

Flow Changes - 2017

Flow Changes - 2016

Flow Changes - 2015

Flow Changes - 2014

Flow Changes - 2013

Flow Changes - 2012

Flow Changes - 2011