Is tap water safe to drink in Bolivia?

No, tap water is not safe to drink anywhere in Bolivia. If you consume it, you can end up with nasty gastrointestinal illnesses, mainly because of waterborne bacteria and parasites that foreign immune systems do not handle well.

Travellers should stick to bottled water, or water that has been boiled very thoroughly, or water cleaned with dependable chemical treatments or UV filtration (like a SteriPEN). This goes for brushing your teeth and rinsing raw produce as well. When you are eating out, it is smarter to skip beverages with ice unless the place confirms the ice comes from purified water. Also, biting into unpeeled fresh fruit or raw salads at street markets carries a high chance of food poisoning, for the same reason.