There is a popular saying that "water quality is as important as quantity," but most often more importance is accorded in studying hydrodynamics than hydrochemistry. Research and literature on water chemistry are not commensurate with issues or problems with water quality. Though the utility of water depends on its chemical constituents, little efforts are made to analyze, interpret and understand water chemistry. Much human suffering can be reduced if water quality is maintained to required specifications. New techniques can be invented for improving water quality by continuously carrying out research involving multi-disciplinary professionals. Books on water chemistry are very limited and those available are more useful to academics. Many organizations are engaged in monitoring, assessing and evaluating water chemistry but they are handicapped by lack of suitable books to guide them on methods of data analysis and interpretation. This book is a one-stop-shop on water chemistry. It is a compilation of a wide spectrum of topics on the subject and caters to the needs of students, researchers, professionals and water managers. The book has 20 chapters containing detail discussions beginning from basic to advanced studies on hydrochemistry. It also explains vividly all activities involved in the study of water chemistry. Each chapter begins with an introduction of the topic and is divided into sub-topics for easy accessibility. Topics are discussed in simple language supported by ample examples. All chapters end with a question bank and exercises providing an opportunity for readers to assess their understanding. Data organization, preparation of plots and interpretation techniques are presented in steps to facilitate practice even by beginners. Question banks with keys and solved exercises support students preparing for competitive examinations.