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.
New Transmission Recommendations
In response to rising demand and evolving reliability needs, the IESO has developed three plans that outline recommendations for a phased approach to new and reinforced transmission infrastructure across Ontario. Learn more: North of Sudbury Bulk Plan | Eastern Ontario Bulk Plan | South and Central Bulk Plan
Energy Efficiency Day
National Energy Efficiency Day is on Oct. 7 this year. As Save on Energy marks its 15th anniversary, energy efficiency has always been a low-cost, non-emitting resource that ensures Ontario’s system stays reliable, affordable and sustainable while also supporting economic growth. Learn more.
Stakeholder Engagement Meetings
The agenda for the October 14-16 stakeholder engagement meetings is now available.
Meeting materials and recorded presentations for the September stakeholder engagement meetings are also posted.
News and Updates:
- 2026 Capacity Auction Qualification Final Reminder September 28, 2026
- Fall Marketplace Training - Registration Open for Instructor-Led Online Virtual Courses September 28, 2026