A boil water order has been issued for Watson Lake, Yukon, due to potential contamination of water from broken sewer and water pipes in the community.

Pat Living, communications manager for the health department, said the boil water advisory is precautionary, but will remain in effect for at least three days.

"A contractor is down in Watson Lake doing some work on replacing a sanitary sewer line and in doing so ran into a water main," she said.

"The water main has been shut off. Some houses actually have no water. Drinking water is being provided to some of the houses that have been affected but we need to take a look at exactly what it is and how long it will take to replace."

There's also a boil water advisory in place in Burwash Landing. Yukon's chief medical officer of health said a routine water sample there revealed traces of E. coli bacteria.

Brendan Hanley said no illness has been linked to the water and the water delivery truck will be sterilized.