The electrochemical oxidation of phenol in the presence of NaCl for wastewater treatment was studied at Ti/IrO2 anodes. The ecperimental results have shown that the presence of NaCl catalyses the anodic oxidation of phenol only at Ti/IrO2 anodes due to the participation of electrogenerated CIO in the oxidation. Analysis of the oxidation products has shown that initially organocholrinated compounds are formed in the electrolyte which are further oxidized to volatile organics(CHCl3)