The aim is to discuss the occurrence of pharmaceutical residues in water environment, from their source to wastewater treatment and effect on ecosystems. Further, to intensify contacts between professionals, scientists, engineers, water managers (river basin administrators, etc.) and policy makers involved in conference themes (A) wastewater treatment, (B) surface waters, (C) groundwater, (D) drinking water supply, (E) aquatic ecosystems, and (F) legislation (setting water quality standards).