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

The pristine turbine hall at Darlington Nuclear Generating Station.

Darlington refurbishment project

Once complete, this project will enable production of clean, safe, low-cost, and emission-free electricity from Darlington for 30 more years.

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
Visitor centres
At our visitor centres, the public is welcomed to see how their power is made and learn about Ontario's low-carbon electricity system.
Educational resources
Hydroelectric Water Portal (water.opg.com)

Careers
Investors
Reports
OPG Websites
- Initiatives
- Subsidiaries

Natural gas power

There when Ontario needs it

Reliable operation of Ontario’s electricity system depends on continually balancing supply and demand in real time. Gas generation plays a critical role in maintaining reliability because it’s flexible and can be dispatched easily when it’s needed most.

Explore how gas-fired power works and the important role it plays in Ontario Power Generation’s (OPG's) energy mix.

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Thermal fleet

4,850

MW in-service generating capacity (Mar. 31, 2025)

1

station dual-fuelled by oil and natural gas

4

Atura Power combined-cycle gas turbine stations

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Atura Power

OPG’s subsidiary, Atura Power, is the operator of four combined-cycle gas turbine generating stations in Ontario.

Fuelling system reliability

Closing our coal stations remains one of the world’s single largest actions to combat climate change. In the absence of coal, gas-fired power generation stepped up to play the ever-important role of ensuring system reliability with its own unique set of benefits.

Flexibility — These stations can remain unfuelled on standby for long periods of time, yet be ready to quickly spring into action to help meet any spikes in Ontario’s energy demand.

Enabling renewables — Gas also helps enable other important renewable energy sources like wind and solar which are intermittent sources that require backup.

Regulating costs — Given its relatively low operating and fuel costs, gas power also helps keep electricity costs down for customers.

Natural gas - power on demand

Our gas-fired generation

Facility type:
Region:
Nearest city/town:
Located on:
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More info:

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Lennox site-specific air standards

On March 15, 2022, OPG received approval from the Ministry of Environment, Conservation & Parks (MECP) for site-specific standards for Lennox Generating Station. The site-specific standards include: sulphur dioxide (SO₂), sulphuric acid (H₂S0₄) and oxides of nitrogen (NO_x).

Copies of the site-specific standard approvals are available for review:

Additional health effect information regarding exposure to the contaminants above can be found here:

Sulphur dioxide (SO₂) health effects

Community engagement

As part of the Amended Environmental Compliance Approval (ECA) issued by the MECP for Lennox, OPG has committed to ongoing community engagement and notification. For more information, please see our latest Community Engagement Report.

If you would like to become a contributing member of the Community Liaison Committee, or have a concern regarding Lennox operations, please Contact Us.

Two continuous ambient air monitoring network systems and a meteorological tower have been installed for the communities in the south of Lennox and Addington. The ambient air monitoring stations are designed to collect data for Sulphur Dioxide (SO₂) and Nitrogen Oxides (NOx), which may originate from the operation of the Lennox Generating Station, or from other sources in the Lennox and Addington area. Information on the ambient air monitoring network stations and real-time data can be viewed at: https://la.rotekreporting.ca.

If you would like to subscribe to receive alerts from the Public Notification System, please text “Start” to 613-777-6476.

Public notifications will be sent when:

Lennox Generating Station is operating on Residual Fuel Oil above megawatt thresholds set by MECP.
Ambient Air Monitoring stations detect SO₂ emissions exceeding thresholds established by the MECP.

Territorial Acknowledgement

Central Ontario

Eastern Ontario

Northeastern Ontario

Northwestern Ontario

Southern Ontario - Durham Region

Southern Ontario - Niagara Region

Southwestern Ontario