Chemical pesticides are the most important component of any pest management strategy . Soil, an important component of the environment, act as a sink for the pesticides used in agriculture. The pesticides preset in soil sometimes act as a source of contamination for succeeding crop. From soil, the pesticides residues can reach water bodies by leaching and runoff. Pesticides are inherently toxic molecules. Once they reach the water bodies, they start adversely affecting the aquatic environment. Presence residue in ground water is extremely hazardous to human beings as ground water is major source of drinking water.