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Contact Us


Customer Communications Centre
Email​ AddressCustomerCommunications@HydroOne.com
Billing and Service Inquiries (7:30 am - 8:00 pm EST, Monday to Friday)1-888-664-9376
Report a Power Outage, Fallen Tree Hazard or Emergency (24 Hours)1 (800) 434-1235
Fax​(905) 944-3251
Mailing Address​Hydro One Networks Inc.
P.O. Box 5700, Markham, Ontario  L3R 1C8


Corporate Head Office
Main Switchboard Toll-Free​1-877-955-1155
Main Switchboard Toronto​416-345-5000
Mailing Address​Hydro One Networks Inc.
483 Bay Street
South Tower, 8th Floor Reception
Toronto, Ontario   M5G 2P5​


Environment, Health & Safety
Toll-Free Electric and Magnetic Fields (EMF) Inquiries1-800-728-9533


Local Distribution Companies (LDCs), Industrial/Large Customers and Generators
General Inquiries​LargeAccounts@HydroOne.com
See also Customer Business Relations
Application/Document Submissions​DxGenerationConnections@HydroOne.com
Mailing Address​Hydro One Networks Inc.
Attn: Dx Generation Connections Group
185 Clegg Road, Markham, ON   L6G 1B7​


Regulatory Affairs
General inquiries on applications filed with the Ontario Energy BoardRegulatory@HydroOne.com


Right-of-Way and Property Maintenance
​Hydro One does not own and is not responsible for maintaining all of the property on transmission corridors. Before calling us, please contact your local municipality to confirm ownership. For the transmission corridors we maintain, Hydro One has a policy of cutting grass six times a year. ​
General inquiries about conditions on Hydro One's transmission
corridors and properties, such as high grass or dumping ​
Corridor maintenance requests​Webmaster@HydroOne.com​
Hydro One Real Estate Services​1-888-231-6657


Security Operations ​
If you have any information regarding suspected theft of electricity, please call our toll-free number. The Hydro One Theft of Power Tips Line is NOT traceable back to the person who calls. Please email us if you see any suspicious activity on
Hydro One property.​ ​​ ​
Email​ AddressSecurity.Operations@HydroOne.com
General Inquiries/Theft of Power Tips Line​1-866-550-6477


Sponsorships and Donations
General Inquiries​See Sponsorships and Donations


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