Production process in vehicle exhaust small industry releases waste water from xhaust tube electroplating and anodizing without any pre-treatment. It contains plating and coloring from Chroom hexavalent as much as 65,586 mg/l and lead 86,576 mg/l, which is more that the electroplated and anodized waste water quality limit of and 0,3 mg/l 0.1 mg/l for Lead concentration. In addition Chroom and Lead is categorized as toxic and dangerous waste substances. This research is aimed at studying the fundamental characteristics of Chroom and Lead separated from electroplated waste water in exhaust tube by means of electro-Coagulation. To get a comprehensive understanding of process characteristics, two intrinsic parameters are the focus of this research. This include electro-chemistry (installed voltage and current gain) and psycho-chemistry-fluid (process time and contaminant concentration). The research method involved designing assembly and fabrication of an electro-coagulation unit in the laboratory scale. It also a characteristic study of separation process by varying both electrochemistry and psycho-chemistry-fluid parameters, whilst developing a characteristic model of Chroom and lead separation. Those research stages provided measured contributions that resulted in a prototype of a compact and modular electrocoagulation device. This was designed with 5 pairs of aluminum electrodes that capable of separating chroom and lead with a gain of 88,76% and 87.54%.