Skip to Content

Our role in the energy sector

The energy sector in Ontario can be quite confusing, but Ontario Power Generation’s role within the system is quite simple – we are Ontario’s largest clean and low-cost power generator, producing about half of the electricity that the province relies on each day.

Discover how OPG maintains its role as a world-leader in energy production.

Electricity 101

Ontario’s electricity system is made of three components.



Ontario’s electricity is produced by a mix of energy sources



Transmission lines carry the power across Ontario



Local utilities deliver the power to homes and businesses

Ontario’s electricity system in :60

Share this video:

Ontario’s energy mix

OPG is the largest electricity generator, providing about half of the province’s power, and the only publicly-owned generator. We’re also the only generator to have our rates set by the Ontario Energy Board following public hearings.

As of Jan. 2, 2019, our available generation is 16,295 megawatts and we own and operate:

  • 2 nuclear stations
  • 66 hydroelectric stations on 24 river systems
  • 1 biomass station
  • 1 thermal station
  • 1 solar facility

OPG also owns two other nuclear stations, which are leased to Bruce Power L.P.

We also co-own, but don’t operate, the Portlands Energy Centre in Toronto and the Brighton Beach gas-fired generating station in Windsor.

Beyond Ontario

We recently purchased Eagle Creek Renewable Energy LLC, an operator of 63 small hydropower facilities in the United States. Eagle Creek operates independently as a wholly-owned subsidiary of OPG.

Investing in Ontario’s future

OPG invests millions in economies and communities across Ontario, employing thousands of people to maintain a modern, sophisticated energy fleet.

We partner with local, environmental and Indigenous groups to improve the wellbeing of the communities where we operate.

We look beyond our operations to help protect the environment through biodiversity education and enhancement.

And we’re always focused on getting better by using new technologies and developing innovative ways to power Ontario’s future.