Hypsometric analysis of four agricultural watersheds namely, Parga, Paharpur-1, Bhaluksunda and RK-35 falling in laterite zone of West Bengal was carried out for assessing their erosion status.

Anaerobic treatment of industrial waste water has gained considerable importance in the past decade.

This article describes the Reverse Osmosis technology and its cost economics to convert the brackish ground water and tap water of poor quality to potable water.

The prominent rivers of Bihar all originating from Nepal and entering into Bihar, are adversely affected sands-play resulting from flood.

The management of biomedical waste in health centres, clinics and hospitals is gaining importance in recent times, since it has a lot of hazards and impacts on people and environment.

In the present study drinking water samples of different ground water sources had been analyzed for the estimation of a problematic chemical parameter nitrate. Analysis of drinking water samples of different sources in different zones in Alwar revealed that the concentration of nitrate had been recorded highest in drinking water samples of North-West Zone.

Nitrogen is an important nutrient in domestic and industrial wastewater and its elevated concentration in the wetland promotes explosive growth of algae. The decomposition of the algae leads to an excessive growth of bacteria, utilizing and dissolved oxygen from water. This process of rapid algal growth leading to oxygen-starved waters is known as eutrophication.

Author describes a success story of implementing a distributed SCADA system first time in India in a rural water supply scheme of PHED, Govt. of West Bengal for arsenic prone areas.

The treatment and disposal of wastewaters is becoming more and more important as ever increasing population and urbanization threaten existing potable water supplies in many areas of the world. Worldwide natural wetlands are still used for watewater treatment but at present, the use of constructed wetlands is becoming more popular and effective around the world.

With the increase in population and revolutionary development in the field of agriculture and industrial sectors, requirement of water has drastically increased in our country. Consequences of rising demand of water has rapidly decreased its quantity and deteriorated the quality, thereby requires its judicious use and reuse.