Today, hydropower provides over 20% of Ontario’s electricity.
Ontario has already developed most of its commercially viable hydroelectric potential.
Developing remaining sites will make a modest but worthwhile contribution to expanding our low-cost, low-carbon electricity supply. Large scale projects in remote locations will have higher costs due to environmental and land use issues and for the long transmission lines.
Up until the 1950s, waterpower resources underpinned Ontario’s electricity supply.