According to the Center for Disease Control, the vast majority of teens don't drink adequate amounts of water. Many schools don't serve water with lunch, and don't have enough water fountains.
When experts conducted a study at one school mandating that kids have enough water to drink, it led to a 30 percent decrease in weight risks.
The U.S. Department of Agriculture hasn't decided whether fountains at schools are sufficient, or if more needs to be done.