This study generated a and recommendations that allows decision makers to establish a framework for regulating contaminants that are likely to pose risks to drinking water in the well-field. The acute need for water calls for a development approach that considers environmental
factors. It becomes more pressing as industrialization and development advances. In view of this, the current study aims to identify the pathways of pollutants and travel times of contamination. The well field provides more than 30 % of drinking water supply of Addis Ababa. The study area is a sub basin in the Awash drainage basin, particularly in southeast of the Akaki catchment. A groundwater flow was constructed to indicate the existing flow condition. The was then calibrated both under steady state and transient state flows, to prove that the represents actual conditions.The ing tools have been eventually used by introduction of particles at contaminant sources upstream of wells and at
the well field, then to identify the path lines, and travel times.The results revealed that the flow lines intersect with the Akaki River in numerous places. Furthermore, the flow lines converge towards Akaki well field, implying contaminated water from the upper part of the aquifer will be pulled into the wells. Therefore, there is a high risk of vulnerability of the well field to pollution. Hence, the following recommendations are helpful in cutting the risks posed. One should conduct contaminant transport analysis taking into account chemical
reactions, attenuation and multiple layer aquifer;Manufacturing activities having pollution potential must be limited in special areas far from water wells; Industrial enterprises shall create closedâ€“loop water supply systems involving effluent reuse; Environmental policy with regard to
waste disposal and agricultural practices to be allowed in thearea must be implemented with particular emphasis for the protection zones around the well field.