What benefit does a flushing program provide to the water supply?

A flushing program is primarily beneficial to water supply systems as it improves water quality by removing sediments. Over time, sediments can accumulate in water distribution pipes, potentially leading to discolored water, odors, and a decrease in overall water quality. By conducting systematic flushing, these sediments are dislodged and washed away, resulting in clearer and fresher water. This process not only enhances the aesthetic aspects of the water but also ensures that it meets health standards by minimizing the risks associated with contaminants that may be held in the sediment.

The other options, while relevant to water distribution, do not accurately convey the main advantage of a flushing program. For instance, increasing water temperatures may occur due to various environmental factors but is not a direct benefit of flushing. Additionally, while reducing the need for chemical treatment can be a positive outcome of improved water quality, it is not the primary focus of a flushing program. Finally, lowering system pressure is typically not a goal of flushing; rather, maintaining or temporarily increasing flow during the flushing process is more common to ensure that sediments are effectively cleared from the pipes.