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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 more than 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

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Ontario’s energy mix

OPG’s diverse, clean and low-cost electricity generation portfolio in Ontario includes:

  • 66 hydroelectric stations

  • 2 nuclear stations

  • 1 biomass station

  • 1 dual-fuelled oil and gas station

  • 4 natural gas-fuelled stations owned and operated by wholly-owned subsidiary Atura Power

  • 1 solar facility

We operate our stations in a safe, transparent and environmentally-responsible manner. This includes protecting and enhancing the local environment, supporting the provincial and local economies and helping make our site communities better places to live, work and play.

OPG also owns a number of additional facilities in Ontario and the United States:

  • OPG's US Hydroelectric Platform — OPG wholly or jointly owns and operates 85 hydroelectric generating stations in the United States through wholly-owned subsidiaries known as Eagle Creek Renewable Energy. These subsidiaries also have minority shareholdings in 14 hydroelectric and two solar facilities in the United States.
  • Bruce nuclear stations — OPG also owns two other nuclear generating stations in Ontario that are leased to Bruce Power L.P.

All generating assets as of Sept. 30, 2020, are shown on this map(edit).

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.