The goal of this research project is to assess the use of ozonation in pre-disinfection and the use of chloramines in secondary disinfection as treatment alternatives for reducing chlorinated disinfection byproduct (DBP) formation in a small Quebec water utility. The research comprises two steps. First, a portrait of the spatial and temporal occurrence of THMs and HAAs in the distribution system is drawn. Second, pilot studies and laboratory assays that simulate the formation of THMs and HAAs in the distribution system are carried out. Pilot studies include variable alternatives of water treatment and disinfection, including ozone followed by slow sand filtration, chloramines and/or chlorine. Includes 21 references, tables, figures.