The city says it can't guarantee the safety of the drinking water after a failure in the chlorination system at Latimer Lake.
Without chlorine, the water isn't being disinfected so a boil water order has been issued for everyone east of Reversing Falls with the exception of part of Millidgeville.
Those water users in Millidgeville not affected live north of Spar Cove Road and Belleview Avenue, north of Millidge Avenue and Ropewalk Road as well as north of the Superstore on Somerset Street.
They're being asked to conserve their water and the city warns the boil water order might be expanded to include them as well.
For more info on the boil water order, click here