 Getting enough water each day is crucial to our health, but how much water should we really be drinking? Dr. Katie Loth at the University of Minnesota says it depends on multiple factors. Your age, your size, the heat, how active you are. But in general, we tend to recommend about 13 cups of water a day for men, nine for women, more if they're pregnant or breastfeeding. And then for children or teens, we think about about six to eight cups of water. Duluth officials welcomed a new terminal at Sky Harbor Airport.