Skip Links
Lorem ipsum solor amet

Connecting Today.
Powering Tomorrow.

The Independent Electricity System Operator (IESO) works at the heart of Ontario's power system. The IESO delivers key services across the electricity sector including: managing the power system in real-time, planning for the province's future energy needs, enabling conservation and designing a more efficient electricity marketplace to support sector evolution. 

Stay Connected


Reliability Coordinator for Ontario

The IESO operates Ontario’s bulk power system so that electricity is available when and where it’s needed. It regularly assesses supply and demand conditions and can take a number of actions to keep supply and demand in balance. The IESO also oversees emergency preparedness and power restoration activities for the province’s grid, including coordinating plans with market participants.

Learn more at Ensuring A Reliable Grid.

Ontario city streetscape Learn

Spotlight on Roles in Electricity Sector

Ever wonder who does what in the electricity sector to make sure that the lights stay on and electricity is safely delivered to your home or business?

See Overview of Sector Roles for a description of the various entities and the roles they play to ensure that the system is always ready to meet Ontario's electricity needs now and into the future.

The's Learn section is presented for readers who would like to learn more about Ontario's electricity sector.

Market Renewal Sector Participants

Educational Presentations Available

The IESO hosted a number of education and awareness building sessions throughout the month of December. The purpose of these targeted sessions was to provide a practical understanding to consumers, generators, traders and others, of the key aspects of the energy stream high-level designs within the Market Renewal Program.

To view the presentations, please see Market Renewal Education and Awareness Sessions. 

Kilowatt way graphics

Kilowatt Way

Whether you live in an apartment or a house – four quick questions will reveal how you use electricity and show you ways to become more energy efficient.

Visit Kilowatt Way