What is a primary goal of secondary disinfection in water distribution systems?

The primary goal of secondary disinfection in water distribution systems is to maintain residual disinfectant levels. This is essential because water can become recontaminated as it moves through distribution systems. Maintaining a residual level of disinfectant, such as chlorine or chloramine, ensures that any pathogens that may enter the water supply are effectively controlled, providing ongoing protection from microbial contamination.

Secondary disinfection is crucial for keeping the water safe until it reaches the end user, as it reduces the risk of bacterial regrowth and ensures that the water remains safe for consumption. While eliminating all pathogens completely is an important aspect of primary disinfection, secondary disinfection focuses on sustaining a certain level of disinfectant throughout the water distribution network. Enhancing taste and odor is a secondary benefit rather than the primary focus, and reducing operational costs is less relevant to the specific goal of ensuring water safety.