Water scarcity and urbanization. This is probably one of the first drivers that come to mind when thinking of water reuse, especially in typically arid regions such as the U.S. southwest or Middle East. However, it is becoming more of a driver in areas not traditionally water scarce, such as Tennessee, Georgia, northern Virginia and Massachusetts, as water resources are becoming fully allocated even in regions with high annual rainfall. Water scarcity can also be a driver in areas that locally rely on one specific aquifer or reservoir. Adding reclaimed water to an industry supply portfolio can increase reliability of water supply for critical operations.