Increasing demands on limited water resources have made wastewater recycling (reclamation or reuse) an attractive option for extending water supplies. Treatment technologies have evolved such that recycled water is of sufficient quality to satisfy most non-potable demands, and as such, recycled water has increasingly been used for municipal irrigation, toilet flushing, industrial cooling, and other applications. Many communities are currently engaging in discussions about the possibility of using recycled water to meet potable demands as well. In fact, potable reuse has already been implemented in many communities throughout the United States (U.S.) and the world, but the treatment technologies vary considerably between systems. The use of recycled water is particularly beneficial to extending water supplies in arid climates, areas facing high growth, and regions under water stressed conditions.