Water is the main cause for health risk on mountains or in third world developing countries; we are extremely take care where in camping all drinking waters are thoroughly boiled to high temperatures and the cooling off to provide guest to pour in the water bottles. While on Tea-House Treks the lodge owner or our guide will make sure that drinking water provided is safe to drink after its been boiled, filtered and ready for drinking, some areas in Annapurna do have safe drinking water post provided by local community known as ACAP (Annapurna Conservation Project) charging minimum price for a liter. We totally disapprove plastic bottle to buy and drink, pollution to the environment as long one will use and re-cycle it, plastic bottle water we allow sometime unless people are desperate for drinking due to under de-hydration condition, or in ill health on walks.