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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:


  • 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.


  • 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.

OEB Reporting

OPG provides regulatory reporting on an ongoing basis to the Ontario Energy Board (OEB).

Sample expanded data.

Sample expanded data.

Environmental and performance reports

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.

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