The World Academy of Sciences Sub-Saharan Africa Regional Partner (TWAS-SAREP) seeks to honour an outstanding young scientist who has made significant contribution to research, development and capacity building to improve sustainability of water and sanitation-related activities and programmes in the developing world. This includes water harvesting, desalination, water efficiency, reducing pollution, eliminating dumping and minimising release of hazardous chemicals and materials. It can also cover protection and restoration of water-related ecosystems, wastewater treatment, recycling and reusing technologies. The prize is awarded in fulfilment of the TWAS objective of recognising, supporting and promoting scientific capacity and excellence in the developing world. The deadline is 15 September 2018.