54-Pesticide residues contamination in water samples collected from four lakes of Mysore City

Abstract

Experiments were conducted to determine the residues of 18 pesticides in water samples collected from Four Lakes (Kamana, Karanji, Kukkarahally and Dalvoi lakes) located in Mysore city and comparison of their contamination level with other agricultural water sources around Mysore district, Karnataka, India. These Samples were analyzed by Gas Chromatograph (GC) consisting of Electron Capture Detector (ECD) for determination of organochlorine pesticides (OCPs) and Flame Photometric Detector (FPD) for the determination of organophosphorus pesticides (OPPs). All the lake water samples, as well as ground water samples, had no detectable pesticide residues. Instead, seven pesticides including Aldrin, p-HCH, y-HCH, Heptachlor, 2, 4-DDD, 2, 4-DDT and 4, 4-DDE were detected in other agricultural water samples collected from inside the farmlands. For the pesticides detected, the presence of p-HCH and 2, 4-DDT was comparatively more. All detected pesticides in water samples were in low concentrations. No organophosphorus pesticide residues were detected in water samples.