This study was carried out to assess the fluoride concentration in groundwater in some villages of northern Rajasthan, India, where groundwater is the main source of drinking water. Water samples collected form deep aquifer based hand-pumps were analysed for fluoride content. Fluoride in presently studied sites was recorded in the ranges of 4.78 and 1.01 mg/l.

The objective of this study was to investigate extent of contamination of groundwater (potable and irrigation) of Aligarh district by pesticides and heavy metals during last 11 years (1996-2006)

The study related to assessment of various chemical constituents in the groundwater, their origin and suitability for human use has been carried out in the Chaliyar river basin of Kerala. Groundwater samples were collected from 27 open dug wells and 7 bore wells, and analyzed.

An investigation has been carried out for the evaluation of fluoride contamination in Sambher block of Jaipur district. Results were compared with standards as prescribed by ISI and WHO.

Tumkur Taluk is located in the southeastern corner of Karnataka state between 13o 06'30" to 13o 31' 00" North latitude and 76o 59' 00" to 77o 19' 00" East Longitude. The Taluk spreads over an area of 1043 sq.km falling within the semiarid region and frequently facing water scarcity as well as quality problems.

Secondary salinisation is the most harmful and extended phenomenon of the unfavourable effects of irrigation on the soil and environment. An attempt was made to study the impact of poor quality ground water on soils in terms of secondary salinisation and availability of soil nutrients in Faridkot district of Punjab of northern India.