Impact of Distribution System Water Quality on Disinfection Efficacy

The project goal of this research report was to assess the impact of dynamic water quality conditions in distribution systems on the inactivation of microorganisms, particularly organisms in suspension in the bulk fluid. The research specifically focused on factors affecting the maintenance of a secondary disinfectant residual and the benefits of maintaining various target levels. Using existing data, literature was reviewed, a model was attempted, and a survey was conducted along with an analysis of the data. The project and approach assessed the ability of a disinfectant residual to serve as an indicator for distribution system microbial integrity.