Water and energy are inherently linked, intersecting at both the supply side (electric generation and water/wastewater facilities) and the end-use side (residential, commericial, industrial, and agriculture sectors). This intersection is commonly called the "energy-water nexus." On the supply side, this intersection is apparent in the massive amounts of water needed to produce and deliver electricity while huge amounts of energy are required to treat and transport water. On the end-use side, energy and water are connected in our homes, businesses, and industrial facilities. The water-energy linkage means that efficiency programs that save water will also save energy and vice versa. If utilities recognize this intersection and work together on joint programs they could learn from one another, document savings, share costs, and potentially achieve greater savings.