Inventories of water users are a vital step in the management of water resources. And new technologies such as GIS, remote sensing and DBMS help to facilitate the collection, management, and exploitation of data collected during inventories. This study is being carried out as part of a project launched by the Loukkos Watershed Agency which aims to carry out inventories of water users in its area of action. For effective management of water resources, it is necessary to identify all water withdrawals for irrigation, industrial or drinking water purposes. This study enabled, on the one hand, to update the inventory of the main water samplers of the Oued Laou Basin which is part of the Lukkos Basin Agency intervention zone, and on the other hand, the development of a database of sampling points and their characteristics and a Web mapping application to facilitate the consultation of these data by the ABHL. Information control is a major issue for any organization at the operational, decision-making and strategic levels. GIS has made a significant contribution to databases as it provides, through geographic information, a unifying framework for data and powerful tools for interpreting, analyzing and representing this data.