Which of the following is a common indicator of a failing water distribution system?

Frequent leaks serve as a common indicator of a failing water distribution system because they signal underlying issues such as aging infrastructure, loss of structural integrity, or inadequate maintenance. When a water distribution system becomes less efficient, it is likely to develop weak points that result in leaks, which can exacerbate water loss and lead to further degradation of system components.

In contrast, increased water pressure could indicate proper functioning or adjustment within a system. High customer satisfaction suggests that the service provided to customers is meeting their expectations, rather than signaling problems within the distribution system. Consistent water quality typically means the system is operating well in terms of maintaining standards and treating water, rather than indicating failure. Each of these other factors does not point to potential issues as directly as frequent leaks do, making them less relevant when assessing the health of a water distribution system.