Water is the most critical resource for civilization and life itself. Throughout the world, water supplies are being threatened for a variety of reasons, including:

The following links provide information on the domestic and international water resources:

Water Treatment Basics

Water can be treated for a variety of uses. How water is treated depends on the type of water being treated and its intended use. The following links provide a very general overview of water treatment and desalination:

www.en.wikipedia.org/wiki/Water_Purification

www.en.wikipedia.org/wiki/Reverse_osmosis

www.en.wikipedia.org/wiki/Desalination