This book presents a detailed design for a water purification plant tailored to the specific needs of the University of Illinois. In response to concerns over the quality of water drawn from campus wells, the author analyzes the water's chemical composition and devises a solution to remove impurities and soften the water. The design incorporates sedimentation, filtration, and the use of a coagulant to achieve the desired results. The book delves into the technical aspects of the purification process, including the dimensions, materials, and mechanisms involved in each stage of the plant's operation. It also considers factors such as flow rate, loss of head, and the capacity of the clear water well, providing a comprehensive overview of the design process. By addressing the challenges posed by the university's water supply, this book offers practical insights into the engineering of water purification systems, making it a valuable resource for professionals in the field.