The drinking water supply of rural populations is mainly provided by groundwater contained in the fissured and discontinuous aquifers of the crystalline basement. The objective of this work is to evaluate the productivity of fissure aquifers according to the hydrodynamic and geo-structural characteristics in the Poro region. The data used concern the Thickness of Alterites (EA), the depths of the water inlets (AE), the nature of the crystalline basement, the Total depth drilled (Pt) and the different flow rates obtained during the pumping tests. These data come from. technical data sheets of 263 productive boreholes selected out of a total of 500 boreholes drilled during a vast village water supply campaign. A statistical analysis of the drilling and hydrodynamic parameters was carried out on the basis of the references drawn up by the Inter-African Hydraulics Committee (CIEH). The distribution of hydrogeological parameters in the Poro region reveals an uneven distribution of weathering thicknesses, flow and transmissivity. Regarding the average depth of water inlets, three distinct fringes are identified, namely 37 m, 44 m and 47 m deep. As for the litho stratigraphy; it highlights three distinct horizons and the construction of the transepts revealed the irregularity of the roof of the base with the presence of two major fractures, both in SW-NE direction. The hydrogeological study revealed that the productivity of the aquifers depends on the geology of the land. There is therefore a correlation between productivity and certain hydrodynamic parameters, in particular the thickness of alteration, the geology of the terrain and the depth of the fractured fringe.