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About the IESO
What We Do
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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
Get Involved
Get Involved
For Residents
There are many ways to participate in energy efficiency efforts - learn how.
For Business
Investing in energy efficiency provides opportunities beyond energy savings.
Regional Planning and Community Engagement
Get involved with power planning for your region.
Funding Opportunities
A range of funding programs to help make Ontario’s electricity system cleaner, greener and smarter.
Innovation
Find out what the IESO is doing to enable innovation in support of its mandate.
Indigenous Relations
Indigenous communities are increasingly playing an active role in Ontario's energy sector.
Stakeholder Engagement
Provide input and feedback on proposed changes affecting Ontario's electricity sector.
microFIT Program
Updates and resources for Ontario's microFIT Program are available here.
Power Data
Power Data
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
Demand Overview
Read more about Ontario’s electricity demand records, forecasts and related real-time reports.
Supply Overview
Get current and historical data for Ontario’s transmission and distribution level supply and yearly import/export data.
Data Directory
A collection of all reports provided on the IESO Public Reports site as well as access to historical data.
Price Overview
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.
Powering Tomorrow
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