Which characteristic is NOT a function of pressure zones in a water distribution system?

Pressure zones in a water distribution system are designed to manage water pressure effectively and ensure that it meets the needs of consumers across different elevations and geographical features. Each characteristic serves a specific role in maintaining the efficiency and reliability of the water supply.

The ability to ensure consistent water pressure across varied elevations is important because changes in elevation can affect water pressure. By creating pressure zones, systems can balance pressure levels appropriately, ensuring that residents at higher elevations receive adequate water flow without compromising the supply to users at lower elevations.

Facilitating the efficient movement of water is another key function, as pressure zones help to optimize flow rates and direct water where it is needed most efficiently. This is essential for maintaining service reliability and minimizing energy costs associated with pumping.

Minimizing water loss due to leaks relates to pressure management, as maintaining appropriate pressure levels can help prevent excess pressure that might exacerbate leaks in the infrastructure. However, while pressure zones provide some indirect benefit in this area, their primary function is not explicitly aimed at reducing leaks.

Preventing contaminants from entering the water supply, while crucial for water quality and safety, is not a characteristic associated with pressure zones. Instead, this aspect is typically addressed through proper system design, including backflow prevention devices and disinfection methods.