To prevent bacterial regrowth, it is desirable to maintain a disinfectant residual in the water distribution network. Therefore, the aim of the study was to determine the variation in residual chlorine degradation in Bahir Dar drinking water distribution system. The study was conducted to assess chlorine dosing and model for residual chlorine using EPANET software. The First-order decay equation was used to describe both bulk and wall chlorine consumption. A total of 30 water samples were collected from different taps in the water distribution network. To model the residual chlorine content, three scenarios were developed. Scenario І and ІІ were developed with the existing chlorine dose with demand-based and pipe diameter; whereas, scenario III was developed by determining the initial chlorine dose in the laboratory with two injection points. The study results showed that the minimum and maximum residual chlorine concentrations in the existing water distribution system were found to be 0.04 and 0.23 mg/l, respectively. The analysis results demonstrated that the residual chlorine most of the distribution system was almost less than the minimum recommended residual chlorine value by the World Health Organization standard which is (0.2mg/l). The study revealed that two new injection points were needed within 0.45 and 0.6 mg/l initial chlorine concentration to solve the minimum residual chlorine problem in the distribution system. In conclusion, the present study results demonstrated that the modeling of chlorine residual in Bahir Dar water supply networks using EPANET software is a promising tool in managing disinfectant concentrations throughout the water distribution systems.