The contamination of water-bodies with pesticides can pose a significant threat to aquatic ecosystems and drinking water resources. Pesticides can enter waterbodies via diffuse sources (surface and subsurface runoff and soil erosion from treated fields, spray drift at application, and deposition after volatilization), or via point sources (farmyard runoff, sewer overflows, and accidental spills, non-agricultural use, such as from application on roads, railways). Organochlorine pesticides are categorized as highly toxic substances by US Environmental Protection Agency (EPA) and the World Health Organization (WHO) considering their environmental persistence, bioaccumulation and toxic action upon the nervous systems. This study was carried out to determine the residue levels of some organochlorine pesticides in domestic drinking water of the Province of Kayseri. Water sampling was performed at 5 water storages providing drinkable water, and the water samples were analyzed by GC-ECD system. Under current analysis conditions, no residues of pesticides were found in the water samples.