Hydro One Statement on Oily Sheen at Little Lake

Hydro One provided the following information to the City of Peterborough on Monday, June 2, 2025 regarding an incident at one of its sites and an oily sheen on Little Lake:

On May 29, a mineral oil spill was discovered at our Aylmer Distribution Station in Peterborough. The spill was the result of damage from metal theft which caused mineral oil to leak from equipment. Some of the released mineral oil entered Little Lake through the sewer system. Our environmental emergency response team was dispatched immediately to contain and clean up the mineral oil.

We have engaged the City of Peterborough and Ministry of the Environment, Conservation and Parks on our response to this incident. Hydro One thanks the City of Peterborough for their support in managing this incident. Our goal, when responding to spills, is to prevent or mitigate potential impacts on the environment and to minimize customer service interruptions.

Metal theft is a serious issue for all utilities and electricity customers. Persons who engage in theft and/or vandalism put themselves, along with our employees, first responders and potentially the public at risk of severe injuries and death when removing metal from our equipment. Our electricity infrastructure should only be accessed by Hydro One’s highly skilled employees or approved contractors. If a member of the public witnesses a crime in progress or suspicious activity involving critical infrastructure, please call 911, your local police service or Crime Stoppers at 1-800-222-8477.

Additional information:

• Non-toxic mineral oil is used to insulate transformers.
• Hydro One will cover the costs associated with the spill of the mineral oil from our station.