Communities in the United States and across the world face water supply challenges due to increasing demand, drought, depletion and contamination of groundwater, and dependence on single sources of supply. These communities are increasingly turning to water reuse as a solution to water scarcity by providing new sources of high quality water supplies. Although water reuse is practiced in the United States and many countries around the world, the growth potential for reclaiming treated wastewater effluent for beneficial use is considerable. In addition, communities are considering other nontraditional sources of water for reuse such as concentrate, brackish groundwater, and storm water.