The textbook “A Brief Guide to the Extraction and Purification of Water in Natural Conditions” discusses issues related to water deficiencies in the human body; methods for examining water sources and methods for purifying water in natural conditions; ways to ensure life safety in conditions of autonomous human survival in nature. The manual is intended for athletes, tourists, workers of tourism industry facilities with areas of activity, including: tourism, health, sports, physical education and recreation, and others. The manual was prepared in collaboration with the Private Educational Institution of Additional Professional Education "Training Center "Safety Academy"