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The first phase of total pollutant load management system (TPLMS) was implemented in the Masan Bay Special Management Area. This study aims to draw the successful factors contributed to facilitate the conflicts and the constraints particularly experienced in the load allocation of TPLMS planning process. Analyses showed that establishment of an affordable water quality target was the most critical because it enabled local governments to allocate the loads which could support for reasonable developments as well as to relieve their load reduction burden. As a local coordinating and facilitating framework, the Masan Bay Advisory Committee and Masan Bay Technical Advisory Task Force also played significant role to make an agreement on the water quality target and to facilitate the conflicts in the load allocation process. However, it appeared that some technical and institutional constraints should be properly addressed to prepare the second-phase TPLMS. The constraints may include the uncertainties which are involved in developing a water quality target, and the hardly applicable load-allocation system to the individual discharge facilities which is not supported by the national effluent permit system. Some improvement strategies and measures such as an establishment of load-based relative management target instead of the quantitative water quality target and introduction of permit-based load allocation system were suggested to overcome the constraints.