Delimitation of the hidrogeological units of Catalonia (aquifers, aquitards, aquicludes and aquifer systems), i.e. those parts of the lithosphere with distinctive parameters for water storage and conduction. The data model of this geoinformation is based on the technical specifications of geological data of the INSPIRE Directive (2007/2/CE).

WMS service for visualization of hydrogeological information. It includes information such as hydrogeological units (aquifers, etc.), water points and physicochemical parameters, piezometry and flow lines, and hydrogeological cartography. Some data are only displayed at specific zoom ranges, depending on the layer.