The report describes the origin of the pollution in the Citarum River, its effect on the water quality as well as the economic losses resulting from the deteriorating water quality. The report also identifies feasible interventions for improving water quality, and predicts the effect of these measures on water quality. The implementation costs and economic benefits of the interventions indicate a favorable benefit-cost ration of greater than 2. Finally, a road map for implementation in the coming 20 years is presented. The report preparation is part of Technical Assistance (TA 7189-INO) Package B of the ICWRMIP.