From May 26 to 30, 2025, the Catalan Institute for Water Research (ICRA) hosted the first edition of its Frontier School, an intensive program aimed at young researchers from around the world. For five days, Girona became a vibrant hub for scientific exchange, technological innovation, and interdisciplinary collaboration, with a strong focus on emerging challenges in water quality, public health, and knowledge transfer.

The week kicked off with a first session dedicated to emerging contaminants, where participants explored the latest advances in analytical chemistry and the challenges of detecting substances such as PFAS and pharmaceuticals in various environmental matrices. They learned about methodologies for assessing human exposure and the associated health risks.

Day two focused on microbiology and public health, with sessions examining how classical and advanced techniques (such as sequencing and bioinformatics) can help monitor pathogens and combat antimicrobial resistance. The day concluded with a guided tour of Girona’s historic center, encouraging group bonding and local discovery.

On the third day, participants took to the field to explore real-world applications of advanced water treatment. They visited the Figueres drinking water plant, managed by Fisersa, and the Roses wastewater treatment plant, where they learned about the AIGUANEIX project—focused on water reclamation for aquifer recharge using technologies like ultrafiltration, reverse osmosis, and advanced oxidation.

Day four centered on advanced technologies and nanotechnology applied to water treatment. Participants explored how nanomaterials can provide innovative solutions for removing persistent contaminants and improving the efficiency of existing systems. Several attendees also presented their own research, creating a collaborative space for learning and scientific dialogue.

The fifth and final day emphasized research communication and exploitation. Through real-life case studies and inspiring experiences, participants reflected on how to take scientific results beyond the lab to create social and economic impact. The program concluded with short presentations before a panel of experts, where participants received valuable feedback to improve their communication skills and explore new outreach and transfer opportunities.

With a blend of scientific excellence, practical applications, and collaborative learning, this first edition of the ICRA Frontier School marked the beginning of a new international training space, aiming to prepare and connect the next generation of scientists working toward a sustainable water future.