Perfluoroalkyl acids (PFAAs) are compounds that are part of a larger group of chemicals named the poly and perfluoroalkyl substances (PFAS). PFAS have been used in a broad variety of industrial and consumer products since the 1950s because of their excellent thermal, biological and chemical stability and outstanding water, dirt and fat repellent and surface tension lowering properties. Because of these properties, PFAAs are ubiquitous, biologically accumulative and in certain cases toxic. Drinking water is one of the human exposure pathways to PFAAs, which are present in surface water. Christian Eschauzier seeks insight into the presence and behaviour of PFAAs in the drinking water production process, as well as the origins of these compounds.