River system data

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Eastern Ontario

Madawaska River

• Madawaska River (PDF)

Mississippi River

• Mississippi River (PDF)

Ottawa River

• Ottawa River (PDF)

Central Ontario

Beaver River

• Beaver River (PDF)

Muskoka River

• Muskoka River (PDF)

Severn River

• Severn River (PDF)

Northeast Ontario

Abitibi River

• Frederickhouse Lake (PDF)
• Abitibi Canyon GS (PDF)
• Peter Sutherland Sr. GS (PDF)

Matabitchuan River

• Rabbit Lake (PDF)
• Matabitchuan GS / Fourbass Lake (PDF)

Mattagami River

• Mesomikenda Lake (PDF)
• Mattagami Lake (PDF)
• Horwood Lake (PDF)
• Peterlong Lake (PDF)
• Wawaitin GS / Kenogamissi Lake (PDF)
• Sandy Falls GS (PDF)
• Little Long GS (PDF)

Montreal River

• Mistinikon Lake (PDF)
• Chute GS (PDF)
• Lady Evelyn Lake (PDF)
• Hound Chute (PDF)
• Lower Notch GS (PDF)

South River

• South River (PDF)

Sturgeon River

• Sturgeon River (PDF)

Wanapitei River

• Wanapitei River (PDF)

Northwest Ontario

Aguasabon River

• Kenogami Diversion (PDF)
• Long Lake (PDF)
• Long Lake Control Dam (PDF)
• Aguasabon GS (PDF)

Kaministiquia River

• Dog Lake (PDF)
• Dog Lake Outflow (PDF)
• Upper Kaministiquia River at Hydroline (PDF)
• Greenwater Lake (PDF)
• Kashabowie Lake (PDF)
• Shebandowan Lake (PDF)
• Kakabeka Falls GS (PDF)
• Kaministiquia River 5-Year (PDF)

Nipigon River

• Waboose Diverson Dam (PDF)
• Ogoki Reservoir (PDF)
• Summit Control Dam (PDF)
• Lake Nipigon (PDF)
• Pine Portage GS (PDF)
• Cameron Falls GS (PDF)
• Alexander GS (PDF)

Please be sure to 'refresh' (CTRL-R or F5) this page to ensure you receive the most recent data.

This data is typically updated every Thursday although during the spring, some river system data is updated more regularly.

• Information for the English River and Winnipeg River is available from the Lake of the Woods Control Board.
• Information for the St. Lawrence River is available from the International Lake Ontario - St. Lawrence River Board.