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About the IESO
What We Do
Vision, Mission and Values
Ontario's Power System
Overview of Sector Roles
A Smarter Grid
Electricity Market, Today and Tomorrow
Ensuring A Reliable Grid
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
A Culture of Conservation
IESO's Conservation Mandate
Ontario's Supply Mix
Ontario's Energy Capacity
Managing A Diverse Supply of Energy
Energy Resources: How They Work
There are many ways to participate in energy efficiency efforts - learn how.
Investing in energy efficiency provides opportunities beyond energy savings.
Regional Planning and Community Engagement
Get involved with power planning for your region.
A range of funding programs to help make Ontario’s electricity system cleaner, greener and smarter.
Indigenous communities are increasingly playing an active role in Ontario's energy sector.
Join thousands of Ontarians who are already part of the microFIT Program and contributing to a cleaner environment.
Looking for more?
See Sector Participants for IESO's market activities and tools, working groups and advisory committees
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.
Learn about the progress made by Ontario's electricity conservation and demand response programs.
Daily, weekly and monthly summaries of market activity.
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