Drinking water, also known as potable water, is water that is safe to drink or use for food preparation. The amount of drinking water required to maintain good health varies, and depends on physical activity level, age, health-related issues, and environmental conditions. Optimal water intake is essential for your health. Every cell in your body needs water to function properly, which is why you must continuously hydrate throughout the day. Most people know how important water intake is, but some are confused over the best type of water to drink. Drinking purified water does a lot more than quench your thirst...it keeps your body in great working order.  There are many benefits to drinking clean, fresh water.