MUS is a service delivery approach that works within an integrated water resource management (IWRM) framework to provide water services that meet the multiple livelihood needs of users.  As a cost-effective approach, MUS brings multiple benefits which contribute to achieving all the Millennium Development Goals (MDGs).  Scaling up MUS requires a shift in current practice towards an enabling environment that promotes inter-sectoral working and participatory planning. This policy brief provides an overview of MUS, including opportunities, challenges and policy recommendations for both practitioners and policy-makers.