Chloramines are primarily used for what purpose in water systems?

Chloramines are primarily used as a method of residual disinfection in water distribution systems. This use stems from their ability to maintain a longer-lasting disinfectant residual compared to free chlorine. Chloramines are formed by combining chlorine with ammonia, making them less reactive with organic materials in the water. As a result, they provide effective disinfection while reducing the formation of disinfection byproducts that can arise from the use of chlorine alone.

In distribution systems, maintaining a disinfectant residual is crucial for ensuring that water remains safe and free from microbial contamination as it travels from treatment facilities to consumers. Chloramines effectively control bacterial regrowth, ensuring that water remains safe throughout the distribution network.

In contrast, options such as flocculation and enhancing water taste do not align with the primary role of chloramines. Flocculation involves the use of chemicals to clump particles together, improving sedimentation and filtration, while enhancing water taste is typically managed through other means, not primarily with chloramines. Reducing water temperature does not relate to chloramine use at all since they serve no function in temperature management.