Leachate is wastewater generated during the decomposition of organic waste that can contaminate soil and groundwater if it is not handled properly. Contamination by leachate can be prevented by reducing the concentration of a pollutant in leachate before the wastewater reaches the ground. Researchers reduce the contamination level by the various method and electrocoagulation is one of the efficient methods for this application. This experimental work was planned to determine the effective pair of the electrode and optimizing the factors which affect the efficiency of electrocoagulation. From the first study, it may be concluded that Iron and Stainless steel pair show higher percentage removal of all the analyzed parameter than the copper and stainless steel pair. Then optimization was carried out with Iron and Stainless steel electrode to analyze the effect of current density, pH, inter-electrode distance, the concentration of electrolyte, electrolysis time and agitation on electrocoagulation. The optimized current density was determined as 60A/m2, electrolysis time was determined as 45 minutes, the inter-electrode distance was determined as 1.5 cm, pH was determined as 7.4, agitation speed was determined as 300 rpm, electrolyte solution was determined as 25% dilution.