The study area, Sidi Slimane, is in the western region of Morocco, which is a highly important agricultural area. OBJECTIVES: The aim of the present study was to assess the suitability of groundwater for drinking in the Sidi Slimane region. ...Collection, transportation and analysis of samples were performed according to the Standard Methods for the Examination of Water and Wastewater of the American Public Health Association APHA , 2017. ...