“PFAS, metals, nitrogen, phosphorus, but also medicine residues and microplastics.” Sandra van de Reepe, who works as a program manager at Hoogheemraadschap de Stichtse Rijnlanden (HDSR), sums up what is in the water that flows through our rivers, canals and streams. “Although our water looks clean and has become cleaner in recent years, it does not meet the requirements that we have agreed with each other in Europe.”