The unequal nature of water resource distribution threatens the physical and economic survival of over a billion people across the world. A number of international and domestic instruments have sought to address this need by providing for a right to water. However, there is no single instrument that can be said to establish categorically or define the right. This article examines the central documents that provide for the right to water and asks whether, in unison, these instruments establish a customary right to water. It will also explore the nature of the obligations imposed by such a right.