This book is dedicated to various water treatment processes. Water treatment describes those processes used to make water more acceptable for a desired end-use. These can include use as drinking water, industrial processes, medical and many other uses. The goal of all water treatment processes is to remove existing contaminants in the water, or reduce the concentration of such contaminants so the water becomes fit for its desired end-use. One such use is returning water that has been used back into the natural environment without adverse ecological impact. Measures taken to ensure water quality not only relate to the treatment of the water, but to its conveyance and distribution after treatment as well.