Abstract: Considerable amounts of Produced Water (PW) is usually accompanied with the production of oil. Most countries with oilfields are generally water stressed countries. This study proposed Electro-Fenton (EF) as alternative for the degradation of organic pollutants in PW. Treatment was carried out in a batch EF reactor with Ti-RuO2/IrO2 anode and activated carbon fiber felt cathode. Response Surface Methodology (RSM) was employed to achieve energy efficient removal of Chemical Oxygen Demand (COD). The effect of crucial process variables, namely, initial ferrous ions concentration (0.1-0.5 mM), current intensity (100-500 mA) and reaction time (30-90 min) on the removal efficiency of COD was studied using contour and response surface plots. The experimental results were analyzed by Analysis of Variance (ANOVA). It was found that under optimum conditions, the COD removal percentage was 82.88%. This percentage was increased to 89.71% and 93.06 by assisting EF process with UVA irradiation of 3 and 6 W, respectively. It is concluded that EF is an effective process for treating produced water and further improvement can be achieved by photo assisting the process.