This project focuses on the potential impacts of the release of Cyprinid Herpes Virus (CyHV3) as a control measure for carp in the Murray-Darling Basin (MDB) and its implications for drinking water quality. It identifies the risks associated with large fish kills, including impacts on water infrastructure, aquatic ecosystems, and the logistics and costs of clean-up efforts. The report highlights concerns about the ability of water treatment plants to handle the organic compounds, taste, and odor issues resulting from a mass mortality event. The investigation conducted incubation experiments to assess the impact of decaying carp biomass on water treatment processes. The findings suggest that water treatment strategies involving coagulation and disinfection can effectively manage realistic carp densities, but extreme carp densities would result in untreatable water. The report emphasizes the importance of targeted virus delivery and carp clean-up strategies to prevent extreme scenarios and minimize environmental and water quality effects.