The present book is based on the facts which are analyzed in the laboratory with extreme accuracy and show the present situation of river Ganga. The monthly fluctuation of different parameters is presented and discussed about their relation with plankton, benthic fauna as well as ichthyofauna. The causes which have degraded the water quality and measures which have to be taken are given in this book.

In addition to this, the data given in this book is a type of documentation which could be of great held to the limnologist, biologist, environmentalist as well as students working in the field of river water ecosystem.