Hydro-Québec generates, transmits and distributes electricity. It is responsible for providing Quebecers with a secure electricity supply. To meet growing demand, it is continuing to develop hydropower, complemented by wind power purchased from independent producers. Hydro-Québec conducts energy-related research and develops new generation, transmission and distribution technologies.

The company has actively promoted energy conservation for a number of years by offering energy efficiency programs for all customer categories.

Hydro-Québec's sole shareholder is the Québec government, which guarantees most of its borrowings. As at December 31, 2007, its assets totaled $64.9 billion while its long-term debt amounted to $31.2 billion.