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About the IESO
What We Do
Ontario's Power System
Overview of Sector Roles
A Smarter Grid
Electricity Market Today
Creating the Electricity Market of Tomorrow
Ensuring A Reliable Grid
Energy Transformation Network of Ontario
Planning and Forecasting
Electricity Pricing in Ontario
For Residents and Small Businesses
For Mid-sized and Large Businesses
How the Wholesale Electricity Price is Determined
What is Global Adjustment?
Conservation and Energy Efficiency
Energy Efficiency in Ontario
Energy Efficiency Research
Ontario's Supply Mix
Ontario's Energy Capacity
Managing A Diverse Supply of Energy
Energy Resources: How They Work
Natural Gas Phase-Out Study
There are many ways to participate in energy efficiency efforts - learn how.
Investing in energy efficiency provides opportunities beyond energy savings.
Get involved with power planning for your region.
A range of funding programs to help make Ontario’s electricity system cleaner, greener and smarter.
Find out what the IESO is doing to enable innovation in support of its mandate.
Indigenous communities are increasingly playing an active role in Ontario's energy sector.
Provide input and feedback on proposed changes affecting Ontario's electricity sector.
Updates and resources for Ontario's microFIT Program are available here.
Engaging with communities is an important part of maintaining a reliable electricity supply, now and in the future.
Demand, Supply, and Price Graphs
This section provides the opportunity to compare real-time demand, supply and price data, as well as access to historical reports.
This Hour’s Data
Read more about Ontario’s electricity demand records, forecasts and related real-time reports.
Get current and historical data for Ontario’s transmission and distribution level supply and yearly import/export data.
A collection of all reports provided on the IESO Public Reports site as well as access to historical data.
Learn about electricity price trends and gain access to historical monthly average prices, global adjustment rates and time-of-use.
Daily Market Summaries
Daily summaries of market activity.
Monthly Market Reports
Monthly summaries of market activity.
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