Do I need to purify my drinking water? A Do I need to purify my drinking water? Generally, it is not required. The water from mountain streams is already purified and much better than the tap water you get in cities. You can carry a filter-fitted water bottle like Lifestraw Go Reusable Personal Filter Water Bottle. Categories: FAQs: Lamkhaga Pass Trek, Trek FAQs Permalink Back to Top By raachotrekkers We trudge on the least explored trails and terrains of Kinnaur, Spiti, Uttarkashi and Garhwal region. View all of raachotrekkers's posts.