Through close cooperation with local waterproviders in the Töss catchment area, we were able to detect a diverse groundwater fauna. The corresponding publication has just been published in Molecular Ecology (https://doi.org/10.1111/mec.16955). In contrast to earlier studies, we did not have to use nets and actually catch the organisms, but were able to detect them on the basis of DNA traces in water samples. We were able to show that the diversity of groundwater fauna differs depending on whether the samples were taken from agricultural or forested sites. However, it is not yet possible to make a statement about the cause or to do a water quality assessment. Eawag has published a news article on the publication. Many thanks also to the FOEN, the SVGW and Eawag for their financial support of the research project.