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About the IESO
Managing the Power System
Overseeing the Electricity Market
Planning for the Future
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Ontario's Electricity Grid
Supply Mix and Generation
Distributed Energy Resources
Imports and Exports
Energy Efficiency
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Energy Storage
Hydrogen
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The Evolving Grid
Securing New Energy Supply
Planning the Electricity System
Decarbonizing the Electricity Sector
Decarbonizing Ontario's Economy
Electricity Pricing Explained
The Value of Electricity Markets
The Hourly Ontario Energy Price
Global Adjustment
Pricing for Residents and Small Businesses
Pricing for Medium and Large Businesses
Electricity Facts and Tools
Electricity Facts
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Electricity Explained Video Series
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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
Get involved with power planning for your region.
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.
microFIT Program
Updates and resources for Ontario's microFIT Program are available here.
Stakeholder Engagement
Provide input and feedback on proposed changes affecting Ontario's electricity sector.
Community Engagement
Engaging with communities is an important part of maintaining a reliable electricity supply, now and in the future.
Decarbonization Hub
Preparing an orderly transition from natural gas generation to other forms of non-emitting supply.
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.
Monthly Market Reports
Monthly summaries of market activity.
Powering Tomorrow
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News and Updates
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January 9, 2019
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