Foreword
The Central Pollution Control Board (CPCB) had prepared reports on the status of wastewater generation, collection. treatment and disposal in Class I cities and Class II towns in 1978-79. Subsequently, it was updated in 1989-90. This is the third in the series of updated information being brought out by CPCB.

As the number of metrocities has increased from 12 in 1981 to 23 in 1991. it Is imperative to study the growing need for water supply and upkeep of sanitation in the metrocities. This document highlights the status of water supply, wastewater generation, collection. treatment and disposal ;!1 the above mentioned metrocities of the country. Further, an attempt has been made to analyse the economic value of treated sewage in terms of its use as nutrient-rich water,

This work wos executed for CPCB by the Environment Protection, Training and Research Institute (EPTRi). Hyderat:ad. The co-operation rendered by municipalities, State Governments. public health engineering departments and state pollution control boards by providing data/information is gratefully acknowledged. We hope, the report will be useful to all those involved in the Improvememt of urban environmental quality.