Smoking area in public area is not the solution because it can not reduce the dangers posed by cigarette smoke. Therefore, this study aims to determine the concentration of CO in cigarette smoke without the use of plasma technology, determine the concentration of CO of any power supply voltage variation using plasma technology and analyzing CO emission removal efficiency of each power supply voltage variations are used in plasma technology. In this study, tobacco use is the type of filter cigarettes and cigars. In addition, the plasma reactor used is a type of Dielectric Barrier Discharge (DBD) with 1kV voltage variation; 1,5 kV and 2 kV. The result showed that the power supply voltage of 1.5 kV has the highest efficiency, ie 72.4% for cigarette filters and 94.8% for cigarettes cigars