As part of the NePMTune project, Henry Beral, Massimiliano Riva and Joaquim Comas traveled on September 20, 2024 to the banks of the Llobregat river to collect water samples. Despite the cloudy weather, this colorful day will allow the monitoring of persistent, mobile and toxic pollutants (PMT) in different types of water (surface water, runoff, groundwater, and secondary effluents).