Augustina Clara Alexander (Tanzania), Tasrina Rabia Choudhury (Bangladesh), Lidia Antonella Rivera Peñalva (Honduras), Zubeda Ukundimana (Uganda), and Shirani Manel Kumari Widana Gamage (Sri Lanka) have been have been awarded the 2024 OWSD-Elsevier Foundation Award for Early-Career Women Scientists in the Developing World for their contributions to research that helps meet the challenge of improved water quality, advancing UN Sustainable Development Goal 6: Clean water and sanitation. The winners’ research explores a wide range of pioneering ways that the challenge of water quality can be tackled, from using hydrological modelling to bioremediation with bacteria, from creating nanocomposites for heavy metal removal to working with communities to develop sustainable practices.