This paper is Oxfam’s essential guide for WASH staff and partners. It describes the processes and standards that Oxfam WASH programmes should follow if they are to be carried out effectively, consistently and in a way which treats affected communities with respect. All WASH staff members are expected to understand and follow these Minimum Requirements. However, it is recognised that in acute emergencies it is preferable to start work on the basics immediately, and build up a comprehensive, quality programme in the following days and weeks. There will, therefore, be some programmes in which certain individual requirements are not appropriate or relevant; in such cases staff members responsible should be able to justify why she/he did things differently, or how the minimum requirement was achieved over time.