Water available in taps, streams, or rivers is usually unfit for drinking purposes. We recommend that our travelers drink boiled or purified water by adding purification agents. Although we discourage the use of bottled mineral water, if you have to use it, double check that the seal is intact and the top of the bottle has not been manhandled. You may also bring purifying tablets if required. Overall, it is very important to drink an adequate quantity of water when you are trekking in Nepal to avoid any threats associated with dehydration and altitude sickness.