Well, first of all, you do want to avoid drinking the tap water. I wouldn't even brush my teeth with the tap water. It maybe is better now, but when I was there, I didn't even feed my, or, give my dog the tap water just because it was that bad. So I stuck to bottled water, distilled water. Always have that with you, always have it available. Food is usually not a problem in the big cities, and even outside, food is not a major problem, but I would try to stick to more established restaurants and places like that just because you don't know where they're sourcing their food.
A retired military service member on how to ensure that water and food are safe for consumption.