In Turkey tap water is considered usable, but we strongly recommend not to drink it: even in five-star hotels, tap water can cause serious stomach upset .So it is better to use bottled water, which is sold everywhere not only in small 0, 5 small bottles, but also large five-liter bottles, which will be enough for the whole vacation .In addition, it is worth to clarify in advance, from which water was made ice, or do not drink ice at all, as it is often done just from tap water .