Abstract
Most of the drinking water supplies of Atakpamé town is assured by wells and boreholes. The quality of this water is threatened by human activities. This study is to evaluate the impact of agricultural techniques and wastewater management on the evolution of the physicochemical quality of well and borehole water, for an understanding of the acquisition of groundwater mineralization in this commune. The water was collected and analyzed and, the results submitted to statistical processing using the software XLSTAT 2018.6 shows that the most downgrading physicochemical parameters are pH, conductivity and nitrates, compared to World Health Organization (WHO) standards. Factor analysis and correlation between the parameters explain the source of nitrate pollution which is linked to the farming and other human activities. The hydro chemical facies represented in the Piper diagram using the diagram software are in majority chlorinated, sodipotassic. Qgis software led to the spatial representation of the nitrate pollution. This pollution is high in Abotèssè, Aféyé-Kpota, Idiotsè and Ikotadi localities. The Hierarchical Ascendant Classification (HAC) of sampled water point gives four important homogeneous subgroups for future sampling selecting a point while representing the subgroup under surveillance.
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