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Batik as cultural heritage of Indonesia has gained growing interest from international customers as well as local ones. However the increasing production is also followed by negative impacts to environment in the form of wastewater. Most of batik industries dispose their wastewater directly into the environment without prior treatment. Therefore, it is necessary to build a wastewater treatment plant (WWTP) as a pilot project for the industries. This paper is focused on efficiency evaluation of the wastewater treatment process for batik industry WWTP at Center for Handicraft and Batik which can serve as a model for small scales industries. Wastewater samples were taken from each treatment unit outlets. Eleven parameters were analyzed from the samples: pH, temperature, biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), total dissolved solids (TDS), phenol, total chrome, total ammonia (NH3-N), sulphides (S) and oil and grease. Treatment efficiency was calculated for all parameters and the effluent analysis results were compared with permissible maximum values as stated in Local Regulation of Special Region of Yogyakarta No. 7 of 2016 on Wastewater Discharged Standards. The results indicate that each treatment process can reduce the concentration of the pollutants. The overall value final effluent was below the standard so the effluent can be discharged safely to the environment.