Foreword
Regional Planning for Environmental Sanitation is largely handicapped by lack of adequate information, collection, collation, and analysis of data. Realising this imperative need, the Central Board for the Prevention and Control of Water Pollution, New Delhi, published a report entitled "Wastewater Collection, Treatment and Disposal in Class I Cities-Status and Action Plan: Control of Urban Pollution Series: CUPS/4/1978- 79", providing relevant information for 142 Class I Cities in India each having a population of 100,000 or more.

Later on it was considered worthwhile to carry out a similar questionnaire survey of the Class II Towns in India each having population between 50,000 and 100,000, as they are the potential centres for rapid urban and industrial growth. As concentrated (point) sources of water pollution the volumetric contribution of wastewater from Class II Towns is one-seventh of that from Class I Cities.

The report was initially prepared by Shri M. Sengupta with the help of Shri D.D. Basu, under the overall supervision of Shri R.N. Bhattacharya of the Central Board.
The Board gratefully acknowledges the co-operation that was received in this connection from the Head of the concerned Municipalities and Chief of Public Health Engineering Directorate of different States and State Water Pollution Control Boards during the conduct of the questionnaire survey.

Shri Bidhi Chand took the overall responsibility of typing the manuscript.