According to the EPA, the average American family uses more than 300 gallons of water per day, which adds up to 109,500 gallons in one year.
Water represents approximately 60 percent of a human’s body weight. Water is integral to every bodily function, from the individual cell to system levels — the respiratory, circulatory, nervous, digestive and other systems all need an adequate supply of water to function properly.
The Mayo Clinic says that adequate daily fluid intake for men is about 15.5 cups (3.7 liters) and 11.5 cups (2.7 liters) for women. A common recommendation for all individuals is eight glasses of water per day. Factors influencing human requirements include exercise, environment, and overall state of health.