Foreword
This report attempts to introduce resilience of river as a living organism in combating onslaught of human interferences in the form of using river as receptacle of urban liquid wastes, domestic and industrial. The resilience of river expressed as assimilation capacity is used in prescribing the extent to which the wastewaters pouring into the river Yamuna is required to be treated before discharge into the Yamuna. If this extent of treatment is introduced the river water quality would come back from its present E grade quality to at least C grade quality if not B grade. .

TThe team lead by Dr. R.H. Siddiqi, Consultant to the Central Board, comprises Dr. R.C. Trivedi, Dr. Shyam Lal, Dr. S.D. Makhijani, Shri J.S. Kamyotra, Shri Rajan Chopra, Shri Brij Mohan Gupta, Shri S.K. ,Nigam, Shri Sanjeev Agrawal and Shri N.C. Durgapal. This work has not only given training to the team who participated but also created a model for investigation for others to follow