Generating power with purpose

As the province’s leading clean power generator, Ontario Power Generation produces reliable, low-cost power using our diverse mix of generating sources. With the help of our employees, site communities and partners, we’re also working to ensure a more sustainable future, a cleaner environment, a stronger economy and more liveable communities.

See how OPG’s purpose goes beyond generating electricity.

In this section

Our generation by the numbers

18,225 Megawatts

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

75 Stations

in Ontario

9,500 + Skilled

Employees supporting Ontario's economy

Safety, diversity and responsibility

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 combined cycle gas turbine 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 and holds minority interests in 14 hydroelectric and two solar facilities in the United States through its US-based wholly-owned subsidiary, Eagle Creek Renewable Energy.
  • Bruce nuclear stations — OPG also owns two other nuclear generating stations in Ontario that are leased to Bruce Power L.P.
An aerial view of Darlington Nuclear Generating Station from afar.

Nuclear power

As the workhorse of Ontario’s electricity system, clean, low-cost nuclear power runs 24/7/365. OPG’s nuclear stations supply about 30% of the province’s electricity.

Generating capacity (Mar. 31, 2023): 4,850 MW

Stations: 2

2022 Output: 35.3 TWh

Explore nuclear power
Low water conditions at the tailrace of Lower Sturgeon hydroelectric generating station.

Hydroelectric power in Ontario

This timeless, renewable and low-cost source of power accounts for more than one-third of OPG’s electricity production. 

Generating capacity (Mar. 31, 2023): 7,613 MW

Stations: 66

2022 Output: 34.2 TWh

Explore hydro power

Additional generation sources

Sunset peeking between the biomass pellet storage silos at Atikokan Generating Station. Biomass power

Learn more about Ontario Power Generation’s Atikokan station that was converted from burning coal into the largest 100% biomass-fuelled plant in Nor...

Lennox gas-fired generating station in summer. Gas power

Learn more about OPG’s portfolio of fuel-efficient gas-fired generating stations and explore how gas-fired power generation works.

OPG's 44 MW Nanticoke Solar facility went into service in March 2019. Solar power

Learn more about OPG's solar power portfolio including our Nanticoke solar facility on the site of a former coal station.

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Our generation

All generation

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