The present study aims at the assessment of groundwater quality in and around the Vrishabhavathi Valley, the erstwhile fresh water stream, today carrying huge quantities of industrial, agricultural and domestic effluents from the western part of Bangalore metropolis.

In the present study, an attempt has been made to evaluate the treatability of a combined tannery and domestic wastewater using lab-scale activated sludge reactor under extended aeration.

The biological index of pollution (BIP) which hinges on the responses of aquatic biota to pollution of water sources was used to assess the quality of some water sources in Zaria area, Nigeria. Water samples were collected from 15 stations comprising three open water sources (lakes) and twelve hand-dug wells on a monthly basis for a period of 24 months. Ten liters of the samples from wells were concentrated to 50 ml by filtering through 70 meshes per cm2 plankton net. Collections from the lakes was by means of dragging net over a 3 meter distance in the water.

The fluoride contamination study has been carried out in ground waters of Khanapur, Bailhongal and Saundatti taluks of Malaprabha sub basin, Belgaum district, Karnataka. 21 samples were collected during the pre-monsoon and post-monsoon season of 1999.

The present study of Bichlari Nala, flowing through Banihal and Ramban (J&K State) has been selected for the potential of surface water resource and its quality has been evaluated thoroughly to generate baseline information.

The quality of water in four streams of Cauvery River in Mandya
District, where many small scale sugar and brewery distilleries are located, was analysed. Sampling was carried out from four streams designated as station 1 (upstream of effluent discharge point), station 2 (effluent discharge point) and station 3 (downstream of effluent discharge) station 4 (fresh water

Total heterotropic plate count (HPC), fecal coliform (FC), Escherichia coli (EC), Salmonella and Shigella were estimated in water samples collected from 21 bore wells and 15 hand pumps in and around Kanpur district, during early and post monsoon which revealed the unsanitary condition of water sources.

Outflow from agricultural fields carries diffuse pollutants like nutrients, pesticides, herbicides etc and transports the pollutants into the nearby streams. It is a matter of serious concern for water managers and environmental researchers.