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Abstract. A special attention for Wadaslintang Irrigation System is taken into account, due to its expansive reach services. This irrigation area consists of a vast 31,853 ha, includes two regencies that are Kebumen and Purworejo. Beside the irrigation interests, the Wadaslintang Reservoir (122 million m3) is also using to supply the need of drinking water in the upstream area until the downstream approximately 0,4 m3/s and electricity services. In the downstream area, the system is connected with the Sempor System Irrigation (6.100 ha) especially in the Kejawang sub-irrigation system (480 ha). The connected irrigation system is used to ensure the availability of water during the dry season because the water discharge from the Sempor irrigation system is not enough to irrigate the paddy fields in this area. The study intends to determine the adequacy of water used for various purposes. The methodology consists of the balancing in water, food, and energy. In practice, water utilization in the irrigation system has adapted to the needs of drinking water without reducing crop productivity.