• An aerial view of the Darlington Nuclear Generating Station.An aerial view of the Darlington Nuclear Generating Station.

    Under budget, ahead of schedule

    Construction on our Darlington Refurbishment has been completed and the project is set to be delivered under budget, ahead of schedule!

  • OPG's Pickering Nuclear Generating Station.OPG's Pickering Nuclear Generating Station.

    Pickering Refurbishment set to power Ontario’s future

    Refurbishing Pickering Nuclear will deliver decades of reliable, low-carbon energy while sustaining high-quality jobs and growing Ontario’s nuclear supply chain.

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    Introducing

    OPG'S WattNext

    Discover our innovative energy education program, created in collaboration with the Ontario Science Centre and Ontario Tech University.

  • An aerial view of OPG's Darlington New Nuclear Project site, which will serve as the home of the G7's first commercial small modular reactor.An aerial view of OPG's Darlington New Nuclear Project site, which will serve as the home of the G7's first commercial small modular reactor.

    OPG marks new milestones in construction of G7’s first SMR

  • OPG's Wesleyville site location.OPG's Wesleyville site location.

    Exploring new nuclear near Port Hope

    OPG will begin working with the Town of Port Hope and First Nations to explore new nuclear generation at our Wesleyville site.

  • Under budget, ahead of schedule
  • Refurbishing Pickering Nuclear
  • OPG’s innovative energy education program
  • OPG marks new milestones in SMR construction
  • Exploring new nuclear
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Upcoming events

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Our subsidiaries

Powering the electric future

As Ontario's largest, low-carbon electricity generator, Ontario Power Generation (OPG) invests in local economies and employs thousands of people across Ontario and the United States. Together with our family of companies, we are leading the development of new clean technologies, advancing electrification initiatives, and refurbishing our existing assets – all to power the demands of a growing clean economy for decades to come.

We delivered one of the world's single-largest climate-specific actions by closing our coal stations, but that does not make us complacent. It makes OPG hungry to do even more to power Ontario’s homes and businesses – and build on our province’s reputation as a clean-energy powerhouse.
Nicolle Butcher
President and CEO, OPG

Electrify your career

Calling all innovators, changemakers, disruptors, and leaders. Be part of a once-in-a-century energy transition and help us electrify life.

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Key projects and initiatives

A digital rendering depicting OPG's new Small Modular Reactor at Darlington.

Darlington SMR

The Darlington site is the only location in Canada licensed for new nuclear with a completed and accepted Environmental Assessment.

A piece of indigenous artwork featuring a fox, a bird and a dreamcatcher.

Our Reconciliation Action Plan

OPG's road map for how we intend to work in partnership with Indigenous communities, businesses, and organizations to advance Reconciliation.
An aerial view of the Darlington Nuclear Generating Station.

Darlington refurbishment project

Once complete, this project will enable production of safe, reliable, and emission-free electricity from Darlington for 30 more years.
Water rushes down the Mattagami River.

Hydroelectric development

OPG is modernizing and optimizing existing hydroelectric assets to generate more clean and reliable power for decades to come.
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Our stories

An aerial view of the Darlington Nuclear Generating Station.
Our stories · 8 min read

Showing the world what’s possible: Darlington Refurbishment construction completed ahead of schedule, under budget

Construction on OPG’s Darlington Refurbishment is now complete and the project is set to be delivered ahead of schedule and under budget.
Cobalt-60 isotopes are placed into a flask in the spent fuel bay at Pickering Nuclear GS.
Our stories · 8 min read

Pickering Nuclear marks record production of life-saving Cobalt-60 isotopes

OPG’s Pickering Nuclear Generating Station is continuing to play a critical role in safeguarding the health of millions of people around the world.
OPG is striving to ensure more women have a place in Ontario’s nuclear control rooms through its new Bridging the Gap Prep Program.
Our stories · 8 min read

OPG 'Bridging the Gap' to help empower women in nuclear operations

OPG is working to ensure more women have a place in Ontario’s nuclear control rooms.
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Generating news

A digital rendering depicting OPG's new Small Modular Reactor at Darlington.

OPG and NYPA to collaborate on new nuclear innovation

OPG and the New York Power Authority have signed an agreement to collaborate on nuclear innovation.
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Watt’s New | November 2025

In this latest issue, learn more about a landmark development for the G7's first SMR and how we're advancing nuclear's future in Ontario.
Prime Minister Mark Carney attends DNNP funding announcement event at Darlington site.

OPG reports 2025 third quarter financial results

Today, Ontario Power Generation reported its financial and operating results for the third quarter of 2025.
The site of the Darlington New Nuclear Project in Clarington, Ontario.

Canada Growth Fund and Building Ontario Fund announce innovative equity investment in world-leading OPG SMR project

Through this agreement, CGF and BOF have committed to invest up to $2 billion and $1 billion, respectively.
Kim Lauritsen, OPG's SVP Enterprise Strategy & Growth speaks at the opening of the Nuclear Discovery Centre in Port Hope, ON

Ontario opens New Nuclear Discovery Centre in Port Hope

The Centre offers hands-on opportunities to learn about nuclear power, energy demand, and OPG’s proposed Wesleyville project.
WattNext, Powered by OPG, Ontario Science Centre and OntarioTech University.

OPG, OSC, and OTU launch the WattNext energy literacy program

WattNext is an innovative, interactive energy literacy initiative designed to empower Ontarians of all ages.
An aerial view of Darlington Nuclear Generating Station.

CNSC issues 20-year operating licence for Darlington

The CNSC announced its decision to renew OPG's operating licence for the Darlington Nuclear Generating Station for a 20-year term.
Community members attend an OPG event featuring Earth Rangers

OPG opens its doors to the community

OPG invites the community to spark its imagination and supercharge the weekend at this year’s Community Power Expo on Saturday, Sept. 20.
In June, the big digger, named Harriet Brooks after Canada’s first female nuclear physicist, arrived at the Port of Oshawa from the Netherlands.

Watt's New | August 2025

In the latest issue of Watt's New, find out how we're advancing the G7’s first commercial SMR and securing more clean power for Ontario's future.

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