This book provides a comprehensive overview of causes, treatments and solutions of water pollution. It summarizes causes and categories of water pollution as well as its effects on the environment and entire ecosystem. It also lists different facts and figures on water pollution along with data sources and references. This book covers both drinking water treatment and wastewater treatment processes. It provides description of unit treatment processes, process flows and process schematics. On top of that, it presents valuable information regarding different alternative water sources and water reuse options. It lists current water reuse regulations, describes existing reuse practices and provides future perspectives of reclaimed water. At the end, this book includes different control strategies and solutions to prevent and stop water pollutions. In this book, scientific and technical concepts are presented in a simple and easy to understand language. So anyone can read and understand the issues and solutions presented without being an expert. As this book covers every aspects of water pollution concisely, it will definitely be beneficial to the professionals as well as the students of school, college and universities.