Ontario-Quebec

Writing in blue marker on a white pipeline sleeve.

Trans-Northern Pipelines Inc. (TNPI) operates 850 kilometres of pipeline in Ontario and Quebec. The pipeline flows east to west, linking Montreal and Oakville, Ontario; and west to east between Nanticoke, Ontario, and Toronto. There are also branch lines which connect Toronto’s Pearson International Airport, Montreal’s Pierre Elliot Trudeau International Airport, and Ottawa, Ontario.

This pipeline safely transports an average of 27,500m3 or approximately 172,900 barrels of refined petroleum products — gasoline, diesel, aviation fuel, and heating fuel — daily.

The pipeline is regulated by the Canada Energy Regulator (CER), the agency responsible for regulating pipeline activities in the interests of the Canadian public.

A yellow TNPI pipeline marker surrounded by natural foliage along a right-of-way flanked by mature trees.
A map showing the pipeline route from Nanticoke, Ontario, towards and through Toronto, to Montreal-Est with lateral pipelines to Ottawa as well as Pearson International Airport and Pierre-Elliott-Trudeau international airport in Dorval.
A map showing the pipeline route from Nanticoke, Ontario, towards and through Toronto, to Montreal-Est with lateral pipelines to Ottawa as well as Pearson International Airport and Pierre-Elliott-Trudeau international airport in Dorval.
A map of the Greater Toronto area showing the pipeline’s route largely along the 401 then south towards Clarkson and onward nearer Lake Ontario, with a lateral pipeline to Toronto Pearson International Airport.
A map of the Ottawa area showing the pipeline route headed in a northwesterly direction, crossing 19 just south of the airport and ending at route 22.
A map of the Montreal area showing the pipeline route originating in Montreal-Est and crossing the river, moving southwesterly to the Ontario border, with a lateral pipeline branching towards Pierre-Elliott-Trudeau international airport in Dorval.