Water pollution is one of the main critical problems we are facing today. It refers to the contamination of water resources like, rivers, oceans, lakes, seas, etc. because of industrial waste, paints, grease, oil spills and various other harmful chemicals. Water pollution affects all the living organisms and the environment. It is very crucial to prevent it and conserve water bodies. The book presents the basic concepts of water pollution in detail. It provides thorough insights into the various theories and practices used to properly utilize water and control its pollution. The topics included in this text are of utmost significance and bound to provide incredible insights to the students. This textbook will serve as a reference to a broad spectrum of readers.