Four billion people worldwide rely on groundwater for their primary source of drinking water. An additional 770 million people, mainly in rural areas, who currently lack access to a safe water source will have to be supplied from groundwater in the future. Groundwater is a major water source for agriculture and industry but it also supplies many rivers, lakes and estuaries, particularly during low-flows. iCRAG’s research activities seek to address this groundwater research challenge by providing innovative methodologies, measurements and models to improve our understanding of ongoing and future threats to groundwater quantity and quality. This will allow improved forecasting of the impacts of contemporary environmental challenges such as land-use change (e.g. agricultural intensification) and climate change. Our research focusses on the hydrogeology of fractured/fissured aquifers in order to characterise both flow and contaminant transport processes more accurately. This research is urgently needed both nationally and internationally due to the pressure on land-use from the world’s growing populations, as well as evidence of rapidly changing climates.