Spatial Assessment of Groundwater Quality for Drinking Purposes in Tobruk City, Libya

The research aims to assess the groundwater quality in the city of Tobruk by analyzing its physical and chemical characteristics, in order to determine its suitability for drinking according to the adopted. Ten groundwater samples were collected and analyzed for the following parameters: TDS, pH, T.H, Ca²⁺, -NO3-, Mg2+ and -SO42. The GIS technique was employed to analyze and illustrate the spatial distribution of groundwater quality. The results indicated that the groundwater in the study area is of poor quality. The analyses revealed that most parameters exceeded the permissible limits specified by drinking water standards. On the other hand, the spatial distribution maps showed that the water quality in the northern and northeastern parts of the study area was of lower quality than the southern parts.