The major performance catagories for drinking water distribution system operations are ____________.

• A. to deliver sufficient water
• B. to meet firefighting requirements, satisfy customer demands, and maintain water quality
• C. to efficiently perform system operations
• D. all of the above

Answer: (D)

Delivering a water distribution system that works well requires addressing several key performance areas at once: enough water to meet daily and peak needs, the ability to support firefighting with sufficient fire-flow, meeting customer expectations in terms of service and reliability, maintaining safe water quality throughout the system, and operating the system efficiently. Each of these aspects covers a different facet of overall performance, and together they define how well the distribution system serves the community. If you focus on just one aspect—like quantity or efficiency—you risk overlooking another critical area, such as fire protection or water quality. That’s why all of the above is the most complete and correct choice.