In this paper the results of surface water treatment process for drinking purpose are presented, using the microfiltrationultrafiltration process. The experimental studies were carried out using a microfiltration-ultrafiltration pilot plant and raw water from Bega River, Timisoara as feed. To assess process performance, the water quality, e.g., turbidity, total coliforms and hardness parameters were determined for two different operating regimes subjected to filtration time. A good efficiency of turbidity removal was achieved, the residual values being situated below the maximum allowable value admitted by drinking water regulation. The presence of total coliforms in treated water imposed the necessity of a final disinfection step, after applying microfiltration-ultrafiltration process.