Get an overview of how water is treated in order to be safe to use and drink.

Discusses many options of water treatment, the contaminants that the treatments are focused on, how the treatment works, and common treatment systems.

In addition to providing a good definition of "Dehydration," this website explains how dehydration affects the body, how people get dehydrated, and how you can treat and prevent dehydration.

This encyclopedia article on dehydration is organized into several sections, including: "Definition," "Causes, incidence, and risk factors," "Symptoms," and "Treatment."