The setting up of a Resource Center by the French Agency for Biodiversity (Agence Française pour la Biodiversité) on catchments aims to improve the effectiveness of the local approach on protection of water catchment areas. As part of this Resource Center, the International Office for Water puts on line a web portal intended for the stakeholders involved in all the catchment areas issues. This portal encourages the stakeholders’ networking, it centralizes and disseminates some resources (data, documentation…) regarding catchment protection and fight against diffuse pollution. Each section of the portal answers as best as possible to the needs of the facilitators of all the catchment areas. The creation of specific sheet describing each catchment area in France is an innovative approach. Information contained in these sheets comes from external databases but also from data directly entered by some of the portal’s users. This web portal is linked to other websites in order to make the selection of useful documentation easier or training sessions for the stakeholders involved in all catchment areas. Finally, this portal will disseminate work carried out by the Resource Center and by numerous partners of this project.