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Pelly's Space
Pelly is a uranium pellet who loves powering nuclear generation, bananas, and hanging out with his besties.
nuclearpelly.ca
Climate Challengers
OPG's podcast series featuring the people doing what they can to help to save the world from the consequences of climate change.
climatechallengers.com
Atura Power
Get to know Ontario's newest power generator. Atura power is helping enable a cleaner energy future.
aturapower.com
Laurentis Energy Partners
Learn more about Laurentis Energy Partners, an OPG subsidiary.
laurentisenergy.com
Prepare to be Safe
Learn more about nuclear emergency preparedness, and order your KI pills.
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Regulatory reporting
Discover how Ontario Power Generation is committed to regulatory compliance through regular environmental reports, station events and updates, and operational performance reports.
Commitment to reporting
OPG reports to regulatory bodies to ensure safe oversight and management of our facilities, including:
Federal
- Canadian Nuclear Safety Commission (CNSC): All nuclear construction, equipment, safety systems, security, operating limits, licences, decommissioning and waste management are subject to CNSC approval.
- Environmental legislation, which includes the Canadian Environmental Protection Act, the Fisheries Act, Canadian Nuclear Safety Act and others.
Provincial
- Ontario Energy Board (OEB): OPG’s economic regulator who approves our regulated payments.
- Provincial and municipal legislation: including the Ontario Energy Board Act, the Electricity Act, the Environmental Protection Act, the Ontario Water Resources Act and the Environmental Assessment Act, etc.
- Independent Electricity System Operator (IESO) ensures compliance with contract requirements and market rules.
Latest performance reports

In our Q3 2022 report, we track performance for Pickering Nuclear in the areas of safety, operational and environmental performance.

In our Q3 2022 report, we track performance for Pickering Nuclear in the areas of safety, operational and environmental performance.

In our Q3 2022 report, we track performance for NSS facilities in the areas of safety, operations, and the environment.
Environmental and performance reports
Environmental Monitoring Program (EMP) Reports
Groundwater Monitoring Reports
- 2021 Pickering Nuclear Groundwater Monitoring Report (PDF)
- 2020 Darlington Nuclear Groundwater Monitoring Report (PDF)
- 2020 Pickering Nuclear Groundwater Monitoring Report (PDF)
- 2019 Darlington Nuclear Groundwater Monitoring Report (PDF)
- 2019 Pickering Nuclear Groundwater Monitoring Report (PDF)
- 2018 Darlington Nuclear Groundwater Monitoring Report (PDF)
- 2018 Pickering Nuclear Groundwater Monitoring Report (PDF)
- Pickering Nuclear Groundwater Monitoring Data (GIS map)
- Darlington Nuclear Groundwater Monitoring Data (GIS map)
Impingement Monitoring Reports
Environmental Emissions Data Reports
- 2022 Q2 Pickering (PDF)
- 2022 Q2 Darlington (PDF)
- 2022 Q2 Nuclear Sustainability Services (PDF)
- 2022 Q1 Pickering (PDF)
- 2022 Q1 Darlington (PDF)
- 2022 Q1 Nuclear Sustainability Services (PDF)
- 2021 Q4 Pickering (PDF)
- 2021 Q4 Darlington (PDF)
- 2021 Q4 Nuclear Sustainability Services (PDF)
- 2021 Q3 Pickering (PDF)
- 2021 Q3 Darlington (PDF)
- 2021 Q3 Nuclear Sustainability Services (PDF)
- 2021 Q2 Pickering (PDF)
- 2021 Q2 Darlington (PDF)
- 2021 Q2 Nuclear Waste Management (PDF)
- 2021 Q1 Pickering (PDF)
- 2021 Q1 Darlington (PDF)
- 2021 Q1 Nuclear Waste Management (PDF)
- 2020 Q4 Pickering (PDF)
- 2020 Q4 Darlington (PDF)
- 2020 Q4 Nuclear Waste Management (PDF)
- 2020 Q3 Pickering (PDF)
- 2020 Q3 Darlington (PDF)
- 2020 Q3 Nuclear Waste Management (PDF)
- 2020 Q2 Pickering (PDF)
- 2020 Q2 Darlington (PDF)
- 2020 Q2 Western Waste Management (PDF)
- 2020 Q1 Pickering (PDF)
- 2020 Q1 Darlington (PDF)
- 2020 Q1 Western Waste Management (PDF)
- 2019 Q4 Pickering (PDF)
- 2019 Q4 Darlington (PDF)
- 2019 Q4 Western Waste Management (PDF)
- 2019 Q3 Pickering (PDF)
- 2019 Q3 Darlington (PDF)
- 2019 Q3 Western Waste Management (PDF)
For older reports, visit the OPG Document Archive.
Pickering Performance Reports
Darlington Performance Reports
Nuclear Sustainability Services Performance Reports
OEB reporting
In accordance with OPG’s 2022-2026 Payment Amounts proceeding, OPG is required to file certain reports with the OEB on a quarterly or annual basis that are to be posted publicly on OPG’s website.
The sections below provide the reporting requirements. Reports will be uploaded as they are filed with the OEB.
Nuclear unit capability factors
Hydroelectric availability
Hydroelectric surplus baseload generation reporting
Reports will be uploaded as they are filed with the OEB.
Full-time equivalent information
Reports will be uploaded as they are filed with the OEB.
Capital in-service additions and construction work in progress
Reports will be uploaded as they are filed with the OEB.
Annual regulatory return
Reports will be uploaded as they are filed with the OEB.
Nuclear liability expenses
Reports will be uploaded as they are filed with the OEB.
Hydroelectric performance
Reports will be uploaded as they are filed with the OEB.
Nuclear performance
Reports will be uploaded as they are filed with the OEB.
Darlington refurbishment report
Deferral and variance account balances
Nuclear safety oversight
OPG’s nuclear safety regulator is the Canadian Nuclear Safety Commission (CNSC).
Under the Nuclear Safety and Control Act (NSCA), the CNSC is responsible for:
- Regulating all nuclear facilities and nuclear-related activities in Canada, and
- Granting station operating licences, which set out the regulations and requirements that stations must operate under.
Oversight of OPG
The CNSC has a presence at each nuclear station in Canada, with continuous access to inspect our stations and review our activities and report to the CNSC Tribunal, an appointed body of individuals who provide further oversight on nuclear activities.
OPG must notify the CNSC of activities which meet the criteria for 'Event Reports', provided to CNSC staff when an activity meets the thresholds set out by the Commission’s regulation document 3.1.1, available below.
Event Reports number fewer than 100 per year, but receive intense scrutiny for causes, corrective action and resolution.
A handful of ‘Event Reports’ may warrant further review by the CNSC Tribunal at one of their regularly held public meetings, where root cause, remedial actions and resolution are discussed in a public forum.
Learn more at www.nuclearsafety.gc.ca/eng

Regulatory event reports
Learn more about how OPG tracks and trends the events reported to the CNSC that occur at our nuclear plants.

Special interest station updates
Learn more about recent station operational events that OPG reports to the public as part of our commitment to transparency.