Mailing Address
Independent Electricity System Operator
1600-120 Adelaide Street West
Toronto, ON M5H 1T1
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Registered Participants with the IESO
Telephone:
905.403.6900
Toll-free:
1.888.448.7777
Email:
customer.relations@ieso.ca
Conservation Programs
Toll-free:
1.877.797.9473
Heating and Cooling Incentive questions:
heatingandcoolingincentive@ieso.ca
Save on Energy Programs:
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About Ontario's electricity sector
Email:
customer.relations@ieso.ca
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Accessibility for Ontarians with Disabilities
As part of the IESO's efforts to meet the needs of people with disabilities, documents posted to this website will be made available in additional formats upon request to customer.relations@ieso.ca.
The IESO also welcomes feedback regarding the methods it uses to provide services to persons with disabilities. Feedback can be directed as follows:
- by telephone - 905.403.6900, toll-free: 1.888.448.7777
- in writing - IESO, Station A, Box 4474, Toronto, ON M5W 4E5, Attention: Customer Relations
- by email - customer.relations@ieso.ca
Any concerns not being adequately dealt with by the IESO can be raised with the IESO's General Counsel:
1600-120 Adelaide Street West
Toronto, ON M5H 1T1
Fax: 416.506.2843
Email: IESO-LegalServices@ieso.ca