During offshore production of gas, condensate and oil, water is co produced in significant amounts and discharged into the sea. For dispersed oil (“free oil”) emission standards of 40 ppm or higher are applied, depending on local legislation. However for dissolved hydrocarbons such as Benzene, Toluene, Ethyl, Ethylbenzene, Xylene etc. (Aromatics), Polycyclic Aromatic Hydrocarbons (PAH's), alkylphenols no emission limits are set. Dissolved hydrocarbon concentrations can go up to 100 ppm level in oil produced water and 500 –1000 ppm levels in gas produced water. Both Oil & Gas Industry and Governments in various countries have addressed this issue and set targets but despite considerable effort no agreed reductions have been obtained, mainly due to the lack of suitable and reliable technologies.