Stormwater runoff is the major challenge in urban areas due to the increase inrnimpervious surfaces, higher rate of urbanization and rapid economic growth. EiABCrncampus is, among institutional plots in Addis Ababa, recently has been transformedrninto more impervious surfaces characterized by 46% of surfaces developed asrnbuildings, roads, parking lots and pedestrian walkways. The stormwater runoffrngenerated from these impervious surfaces transported into municipal drains andrnroadway without any interventions that are found to result in chronic impairment ofrnsurface water quantity and quality. The objective of this study is to investigate thernopportunity of the passive rainwater harvesting system from the impervious groundrnsurfaces of institutional plots in urban areas for its stormwater management and greenrnarea improvement.rnThe GIS and remote sensing were used to produce a suitability map for selecting thernideal location for the placement of water harvesting structures in the EiABC campus.rnThe Bio-retention system was selected among the others Best Management Practicesrnand eventually developed at the selected site within the compound. The quantity ofrnstormwater was estimated by a rational method and the quality parameters wererncollected on site and processed in the laboratory. The study estimated that 620.4m3 ofrnsurface runoff was harvested through Bio-retention system from 4122m2 drains area.rnThe Bio-retention average removal rates for pollutants of TSS, TDS and Turbidity werern76.92%, 59.2%, and 45.67% respectively. This indicated that the quantity and qualityrnof stormwater were managed through the development of simple rainwater harvestingrnstructure as a Bio-retention system