Yes! It’s possible to drink too much water. “There is a point where water can be fatal because in excess it dilutes the electrolyte balance in our bodies," says Lemond. "The upper limit of water varies by age, gender, activity level and health condition,” says Lemond. (You can estimate your suggested water intake using this handy calculator.) Dehydration is also dangerous, so it’s important to stay in tune with your body and its needs throughout the day.