Which of the following is NOT a critical safeguard of a distribution system?

In the context of a water distribution system, critical safeguards are measures put in place to ensure the safety, quality, and reliability of the water supply. Chlorine residual is essential as it helps maintain disinfection throughout the distribution system, preventing the regrowth of harmful microorganisms. Bacteriological sampling is vital for monitoring the presence of pathogens, ensuring that the water remains safe for consumption. Cross-connection control is a safeguard aimed at preventing contamination from non-potable sources entering the water supply system.

Volume control, while important for managing the supply of water and maintaining adequate pressure within the system, does not directly contribute to the safety and purity of the water. It primarily addresses water flow and operational efficiency rather than contamination prevention or disinfection processes. Therefore, it is not considered a critical safeguard in ensuring the safety and quality of the water supplied to consumers.