The Human Right to Water and Sanitation is a UN General Assembly Resolution that was adopted on July 28, 2010. As such, it is not binding for Member States, but rather serves as a set of recommendations and guidelines. The Resolution outlines the nature of the human right to water and sanitation and clarifies the responsibility of states and other parties to uphold that right. This programme ran from 2005 to 2015 and the final document and assessment can be found here.
The right to Water and Sanitation is now being taken over by the Sustainable Development Goals.