Warmer temperatures will result in lower levels of dissolved oxygen. Greater precipitation intensity will result in higher levels of algae, higher concentrations of contaminants, and increases in turbidity. Increases in flooding will also result in higher influent levels to drinking supplies. Many utilities that do not currently experience these problems may find themselves facing new water quality challenges relating to sedimentation, nutrients, and pathogens as a result of climate change. Consequently, water utility operators will have to develop new water treatment options and technologies to continue to meet water quality standards and maintain taste and odor quality.

Changes in hydrology will force many utility managers to address future water supply adequacy for meeting customer demands. Many utility operators will find that adapting to climate change requires development of new sources, implementation of demand-management activities, and changes in summer storage techniques. Water utilities may also have to explore forming water reuse partnerships with wastewater utilities to augment water supply in stressed areas. Furthermore, decreases in water supply may force some utilities to address an increase in conflicts related to water rights and uses.