The B.C. Ministry of Environment confirmed that it is aware of what it called a "small leak" of around one to 1.5 litres a day in one of the bunker fuel pipelines at Watson Island, an industrial area south of Prince Rupert.
"Staff are monitoring the situation closely," an email from the ministry said.
The email also said the ministry would take action to "stabilize, contain and remove the hazard."
An engineering firm has been contracted to join the ministry's response officer to assess the situation today.
It isn't yet clear how long ago the leak began, and the ministry says it will have to assess what impact the leak has had on the local environment.