The ICRA researchers of the Nature-based Solutions group attended the Water Market Europe 2025 event held in Girona, which gathered key players in sustainable water innovation and included several expert-led sessions and networking opportunities. Co-organized by Water Europe and the EU-funded MULTISOURCE project, this year’s focus was on integrating Nature-based Solutions in urban water management under the European Green Deal. During the session on MULTISOURCE pilots, Esther Mendoza, researcher at ICRA, presented results from over a year of monitoring the performance of a greenwall for greywater recycling in a residential building in Sant Quirze del Vallès (Barcelona), and introduced ICRA’s new Experimental Green Wall Facility. The event was a unique chance to exchange ideas and build connections—an inspiring step forward for sustainable water solutions in Europe.