You are made mostly of water. For example, a three day old fetus is 97 percent water; and eight-month old baby is 81 percent water; an adult body is 65-70 percent water.
You could survive about a month without food, but could only survive 5-7 days without water.
Water keeps you healthy by preventing your bones from grinding and your eyes from drying out.
Water carries the chemicals in your brain so you can feel and think.
Healthy tap water is often less than 5 cents per gallon.