What issue can arise from stagnant water in distribution mains?

Stagnant water in distribution mains can lead to multiple issues that negatively affect water quality and customer satisfaction. First, when water remains stagnant for extended periods, the mineral content can increase due to the settling of particles and sedimentation. This accumulation can alter the overall composition of the water.

Additionally, color changes in the water may occur as sediments, iron, and other materials accumulate and are disturbed, leading to visible discoloration. These changes can be alarming for consumers and indicate potential problems with the water supply.

Furthermore, higher taste complaints are likely to arise due to the increased concentration of minerals and possibly the breakdown of organic matter in stagnant water. Changes to the taste of water can significantly affect user satisfaction and trust in the water system.

The correct answer encompasses all these issues, highlighting that stagnant water can indeed lead to increased mineral content, color changes, and taste complaints, making it a comprehensive summary of potential problems caused by stagnant water in distribution systems.