What does the term "residual chlorine" indicate in treated water?

Residual chlorine refers to the amount of chlorine that remains in the water after the disinfection process has been completed. This measurement is crucial because it indicates whether sufficient chlorine has been dosed to eliminate pathogens effectively, and it helps ensure that the water remains safe for consumption throughout the distribution system.

Monitoring residual chlorine levels helps water system operators confirm the effectiveness of their disinfection process. Additionally, it provides assurance that even after water leaves the treatment facility, there will still be adequate disinfection capacity as the water travels through the distribution system.

Understanding residual chlorine is essential for maintaining water quality and compliance with health standards. It plays a vital role in preventing bacterial regrowth and ensuring continuous protection against waterborne diseases.