A dataset of Vertical Electrical Soundings by Schlumberger configuration (n = 37) encompassing a study area of 354 km 2 was utilized to compute Dar-Zarrouk parameters, namely Transverse Unit Resistance (Tr), Longitudinal Unit Conductance (Sc) for groundwater quality differentiation. The (Tr) and (Sc) values were grouped into three categories – Fresh, intermediate, and saline groundwater- for ease in identifying the formation water quality. The geoelectric model interpreted from the dataset reveals a sub-surface configuration made of five geoelectric layers, namely clay, medium-grained sand, medium to fine-grained sand, transition zone, and basal sandstone, lithology validated through cross-referencing with drill samples and resistivity values. The computed datasets were cross-referenced with drill cutting samples, field resistivity values, and aquifer zone thickness to enhance resolution and lower uncertainty for demarcating zones with enhanced possibility of obtaining fresh groundwater within a regionally saline aquifer. Effective utilization of Dar-Zarrouk parameters prevents overlap when deciphering zones for fresh, moderate, and saline groundwater prospects, unlike the electrical resistivity dataset(s) interpretation. Thus, the thematic map displays fresh groundwater prospects’ zone(s) in the study area without inter-mixing zones.