Abstract
Brussels, Belgium, obtains much of its potable water supply from the River Meuse, which is heavily influenced by seasonal precipitation in the temperate climatic zone. The river is affected by human sewage, algal blooms, humic substances, and the infusion of hard groundwater. Chlorine dioxide is used at treatment plants, pumping stations, and clear water reservoirs along the aqueducts for bacterial disinfection and to prevent THM formation.