India is a large country with vast population. It has many localized areas, where water pollution creates such a situation which is not only dangerous to health but also injurious to the economy in many ways with the rapid pace of industrialisation and increase in human population, effluents from industries and cities. In India there are 14 major, 44 medium and 55 minor rivers, share 83% of total dangerous drain, contribute 85% of total surface flow and house 80% of total population. The book deals with the applied Microbiology of water pollution and its control in connection with public health and hygiene. It covers a wide range of subjects and includes practical aspects such as Sewage, Industrial Effluent and Ganga Pollution etc. The book deals with various aspects of biological control of water. The book contains large number of recent references to primary sources of information which covers the material of several features of water pollution by different sources. It explains in a simple and interesting manners the basic concepts of water control and how it is exercised in the present day scenario. The book will be of invaluable help to students, researchers and all those who are interested in the field of microbiology and environment.'