Two liters is 8 cups of water a day and NO it’s definitely not too much water. Here are water recommendations according to age. Children Ages 5-8: Five (8oz/ea.) glasses of water each day or 40 ounces Ages 9-12: Seven (8oz/ea.) glasses of water daily or at least 56 ounces Ages 13-adult: Eight to ten (8 oz./ea.) glasses of water or at least 80 ounces.