This study was performed to compare finished water quality among three different processes. A detailed assessment of performance was carried out duringthe five months of operation. Finished water quality was evaluated on the basis of parameters such as Dissolved organic carbon (DOC), UV254 absorbance, haloacetic acid formation potential (HAAFP), geosmin, 2-methylisoborneol (2-MIB), heterotrophic bacteria and total coliform bacteria. The treatment processes were Process 1 (coagulation-flocculation-sedimentation-sand filtration-ozone-GAC), Process 2 (coagulation-flocculation-sedimentation-microfiltration-ozone-GAC), and Process 3 (coagulation-flocculation-sedimentation-sand filtration-GAC), compared side by side in the pilot testing. Process 2 was found to have better removal efficiency of DOC, UV254 absorbance, HAAFP and heterotrophic bacteria in comparison with process 1 and process 3 under identical conditions. Geosmin, 2-MIB and total coliform bacteria were not detected in finished water from each process.