Our mission, vision & values

As Ontario’s largest clean electricity generator, see how our focus is on generating safe, efficient, and reliable energy.

About

Our subsidiaries
Our subsidiaries & partnerships are helping us improve electricity generation, storage, and distribution technology to electrify life in one generation.
Who we are
Powering Ontario
Ontario’s need for power never takes a rest and neither does OPG — we’re on the job 24 hours a day, seven days a week, powering Ontario.
What we do
Public safety
We maintain a long-term commitment to the health, safety and energy needs of Ontarians, and it shows in everything we do.
Our commitments in action
Code of Business Conduct
We operate according to a Code of Business Conduct that ensures safety, integrity and efficiency for Ontario.
Governance & regulation

Workers in hard hats look out from the top of an open stairway before a huge Canadian flag in a nuclear plant.

Our role in the system

Our role is to help build a stronger Ontario by investing in clean, affordable power and energy solutions that help grow Ontario's economy.

Power generation

Nuclear power
Nuclear power plays an important role in Ontario and OPG’s energy mix, and its critical to helping us achieving our net-zero goals.
Our power
Educational resources
We support students and educators by providing learning resources developed specifically for teachers, young people and schools.
Our role in the system
Nuclear safety and emergency preparedness
We build safety into every step of our energy production and about our comprehensive emergency preparedness plans for Ontarians.
Our commitment to safety
- Nuclear safety and emergency preparedness
- Water safety

An aerial view of the Darlington Nuclear Generating Station.

Darlington refurbishment project

Our mission, vision & valuesAs Ontario’s largest clean electricity generator, see how our focus is on generating safe, efficient, and reliable energy.Learn MoreAbout Our ...

Projects & services

Darlington SMR
The Darlington site is the only location in Canada licenced for new nuclear with a completed and accepted Environmental Assessment.
Our projects
Clean energy credits
With an extensive portfolio of clean energy generation across North America, OPG can offer environmental credits in both Canada and the US.
Our services
- Electrification services
- Clean energy credits

Community investment

The Power for Change Project was designed to give back to Ontario and to the communities where we operate, to help build a cleaner, more sustainable future for generations to come.

Ouimet Canyon Provincial Park, Thunder Bay, Ontario

Territorial acknowledgement

We respectfully acknowledge that our facilities are located within the traditional and treaty territory of Indigenous Nations and communities.

Communities

Territorial Acknowledgement
- Territorial Acknowledgement
  OPG respectfully acknowledges that the lands on which its generating stations and other assets are located are within the traditional and treaty territory of many Indigenous communities. Click to read more.
Central Ontario
- Central Ontario
  Central Ontario is home to 20 of our hydroelectric facilities, some of which, like our Sills Island Generating Station, have been part of their community for more than one hundred years.
Eastern Ontario
- Eastern Ontario
  Eastern Ontario is host to one gas-fired generating station and 15 of our hydroelectric generating stations on the St. Lawrence, Ottawa and Madawaska Rivers.
Northeastern Ontario
- Northeastern Ontario
  Northeastern Ontario contains 14 of our hydroelectric stations, including several we built or redeveloped through key partnerships with local Indigenous communities.
Northwestern Ontario
- Northwestern Ontario
  Northwestern Ontario hosts 11 of our hydroelectric stations as well as a former coal generating station that we converted to use biomass as fuel.
Southern Ontario - Durham Region
- Southern Ontario - Durham Region
  The golden horseshoe of Southern Ontario is home to key operations including our Darlington and Pickering nuclear stations in Clarington and Pickering.
Southern Ontario - Niagara Region
- Southern Ontario - Niagara Region
  The golden horseshoe of Southern Ontario is home to key operations including our iconic Sir Adam Beck hydroelectric stations in Niagara Falls.
Southwestern Ontario
- Southwestern Ontario
  Southwestern Ontario is host to our NSS - Western Waste Management Facility in Bruce County, our Eugenia hydroelectric station near Meaford, and our Nanticoke Solar Facility on the site of the former Nanticoke coal station.

Hydroelectric Water Portal (water.opg.com)

Find water level and flow information from gauges on rivers where OPG operates hydroelectric stations in Ontario.

News & resources

Watt’s New
In our revamped e-newsletter, find out how we're helping electrify Ontario while strengthening its economy, communities, and the environment.
Newsroom
WattNext.ca
Ontario Science Centre, Ontario Tech University and OPG's energy education program aims to educate, inform, and connect Ontarians with energy careers.
Educational resources
Hydroelectric Water Portal (water.opg.com)

Careers
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OPG Websites
- Initiatives
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March 17, 2026

8 min read

Nuclear Waste Management Facility Performance Report - Q4 2025 Results

Accent: smogr6npyuch

Performance update

As part of our commitment to keep you informed, this report tracks performance for Ontario Power Generation’s Nuclear Waste Management facilities in the areas of safety, operations, and the environment. It also summarizes significant accomplishments achieved during the fourth quarter of 2025.

Ontario Power Generation operates three nuclear waste facilities across the province located in Darlington, Pickering & Bruce County. Spent fuel taken from the reactors is stored at each facility locally after it has been cooled. Low and intermediate level materials are stored at OPG’s Western Waste Management Facility.

0.0 TRIF

A dial graphic indicating "green" for excellent performance. 0.0 incidents

Safety

Total Reportable Injury Frequency (TRIF)

TRIF is a measurement of the number of injuries involving OPG employees that result in a fatality, lost time, restricted work or medical treatment per 200,000 hours worked. The Year-to-date TRIF is reported as a 12-month rolling average. The year-to-date actual is 0.00 which is below the year-to-date target of 0.47.

Transportation Safety

The transportation of waste to our Western facility from Darlington, Pickering and Bruce Power is managed by experienced and skilled drivers. In this quarter, all shipments were made safely and accident-free. The fleet safely travelled 147,641.51 additional kilometres and marked over 7 million kilometres safely travelled to-date.

A dial graphic indicating "green" for excellent performance.

0 spills

Environment

Spills to the environment

There were no spills to the environment at our facilities that were reportable to a regulatory authority. The total number of events for the year was below the year end target of 2.0. For detailed environmental information, please refer to the environmental data reports available on our Regulatory Reporting page.

PWMF - 80

DWMF - 47

WWMF - 115

Operational Performance

Pickering Waste Management Facility (PWMF)

A total of 80 Dry Storage Containers (DSC) were transferred up to the end of Q4 which totals 80 of the 80 year-end transfer target.

Darlington Waste Management Facility (DWMF)

A total of 47 Dry Storage Containers (DSC) were transferred up to the end of Q4 which exceeds the 45 year-end transfer target.

Western Waste Management Facility (WWMF)

A total of 115 Used Fuel Dry Storage Containers (DSC) were transferred up to the end of Q4 totaling 115 of the 110 year-end transfer target, exceeding the yearly target set out for the facility.

2,037 m³

Waste Minimization

As of the end of Q4 (Dec. 31, 2025), a total of 2,037 cubic metres of low-level waste has been processed though incineration. This is below the year-end target of 3,510 cubic metres of incinerated low-level waste.

Questions?

Please contact Jennifer Knox, Director - Nuclear Stakeholder Relations, through the form below.

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Nuclear Waste Management Facility Performance Report – Q4 2025

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Southwestern Ontario