Hydration (Water) is one of the player stats in DayZ Standalone. Keeping up your water and energy levels is important aspect of staying alive and healthy, it will allow survivor to naturally regenerate, helping them to recover from Trauma and various illness.
Fresh spawn survivors start with 1800 water. When your Water falls below a certain value, minor thirst occurs. When it falls even farther, major thirst occurs. Eventually a player will dehydrate completely and go unconscious. If a player consumes more water than what is purely necessary, they will become hydrated (dark green) and eventually well hydrated (light green), which means they can go about their activity without concern for their water level for a while.
Water is lost when.. and may be regained by consuming