An attempt has been made in this book to explain the fundamentals of Sanitary Engineering, Sewage, Lab. Testing Treatment and disposal of industrial waste water. The subject as a whole is a complicated one. But it is beloved that the basic ideas are exposed in this book, the reader will be able to have a clear idea of the subject. This book is written in Metric units. The subject-matter explained in simple and easy language assisted by-explanatory and neatly drawn sketches where necessary. This book covers the syllabi prescribed by various university of India-B.E. College Shibpur, jadavpur University, Burdman University, North Bengal University, Bombay University etc. This book will therefore be useful to students preparing for Degree, Diploma and Industrial Engineering.