Efforts to stop between 200,000 and 250,000 litres of crude oil and other material from flowing down the North Saskatchewan River have failed.
The Saskatchewan government said Friday that new steps are being taken.
Husky Energy turned off the pipeline near Maidstone after discovering the leak on Thursday and put down booms in an effort to contain the spill. Now officials say Husky and the government are placing booms further downstream and increasing skimming to try to remove oil from the water.
The town of North Battleford shut down its water intake plant earlier Friday and says it has a three-day supply of water in its reservoirs and water tower.
The cause of the leak is not yet know and officials did not immediately say how old the pipeline is but said it would have been inspected regularly.