Hydroelectric power

Hydroelectric power, or water power, is a timeless, renewable resource that has fuelled Ontario's economic growth since the beginning of the 20th century. Today, it accounts for more than one-third of Ontario Power Generation's electricity production.

See why clean hydroelectric power is an important part of OPG’s energy mix for Ontario.

In this section

Hydroelectric fleet in Ontario

7,613 Megawatts

In-service generating capacity (Mar. 31, 2023)

66 Stations

241 Dams

on 24 river systems

34.2 Terawatt hours

of power produced in 2022

Diving into hydroelectricity

Hydroelectric power is such a popular renewable energy source because it is a clean, reliable, flexible and an inexpensive way to produce the energy Ontario needs.

Hydro generation relies on water, a renewable resource that OPG shares with Indigenous communities as well as local governments, industry and environmental groups, and recreational users.

Hydroelectric power is the lowest-cost energy source. OPG continues to look for development opportunities like the Peter Sutherland Sr. Generating station built with partners Taykwa Tagamou Nation or to upgrade or expand existing stations like the Ranney Falls project.

An aerial view of Whitedog Falls hydroelectric station. An aerial view of Whitedog Falls hydroelectric station. An aerial view of Whitedog Falls hydroelectric station.

Exploring Ontario's hydro opportunities

A new report identifies areas of high generation potential, and provides initial estimates on developing this potential.

Learn more
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Our hydroelectric stations in Ontario

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