According to a study in the American Journal of Public Health, more than half of all U.S. children and adolescents don’t drink enough water. Your children need to drink water for many reasons.

Water helps maintain healthy circulation and metabolism. It also helps regulate body temperature and fosters waste removal. Not getting enough water can result in headaches, irritability, poor physical performance and reduced cognitive function. Water also promotes healthy teeth, especially when the water contains fluoride.

The chart below shows approximately how much water kids of different ages and genders need daily for proper hydration. Physically active kids need more water, especially in higher temperatures.