The leachate sample was collected from Sahom landfill collection pond and transported to the laboratory. In order to minimize chemical and biological changes, the leachate was kept at the temperature of 4 _C. The leachate was characterized according to Standard Method of Water and Wastewater [14] for color, COD, NH3-N, suspended solid (SS), turbidity and pH as presented in Table 1. Concentration of the color concentration was measured at 455 nm wavelength using Hach color method 8025, whereas COD concentration was measured using Hach DR 6000 Spectrophotometer at 620 nm wavelength. Reactor digestion closed reflux colorimetric method for high range determination was used to determine COD. In addition, NH3-N was measured using 4500-NH3 phenate method (F) with spectrophotometer DR6000 at 640 nm wavelength. The method involves addition of phenol solution together with hypochlorite and nitroprusside catalyst to the sample. Ammonia reacts to form indophenol, which has an intense blue color.