In 2004, the institute of Medicine (IOM) of the National Academies of Sciences established new water intake recommendations after two years of examining hundreds of scientific studies. They concluded that 81 percent of your hydration should come from drinking water and other beverages (including coffee and tea); this equals approximately nine 8-ounce glasses per day. The remaining 19 percent should come from foods – especially fruits and vegetables. Fruits and vegetables are 80-99 percent water. Diets rich in produce also help maintain a healthy electrolyte balance. However even bread and cheese are more than 20 percent water each.