This book contains various aspects of water quality monitoring such as pollution monitoring, issues, challenges, policies, remediation, and management approaches in the different water bodies. Water is mainly used for drinking, irrigation, industries, and anthropogenic activities. Various sources such as urbanization, industrialization, sewage, population growth, organic wastes, rock-water interaction, pesticides, chlorinated hydrocarbons, insecticides, herbicides, nutrients etc. are responsible for water pollution in the different aquatic environments. Nowadays, water quality monitoring including issues and management approaches is very important for water resources development and management. Continuous monitoring of water is very essential for safe and secured supply of water for the citizens, society as well as human health.