Tap water should never be used for drinking, preparing food or beverages or making ice. Brushing teeth with tap water should be avoided as well (use factory-sealed bottled water).
Hot beverages like coffee and tea are generally safe if served hot, in other words, iced coffee and iced tea cannot be considered safe.
One good tip: Wipe and dry cans and bottles before opening since they may be contaminated from other sources like ice or splashed water.
For more information, please visit:
http://travel.gc.ca/travelling/health-safety/food-water