In the present investigations, attempts were made to carry out flocculation studies of municipal wastewater with starch-graft-polyacrylamide. Those results were compared with magnafloc LT-31, a commercial cationic polyacrylamide and magnafloc LT-27, a commercial anionic polyacrylamide flocculant. The result that emerges from the work is that cationic polyelectrolyte like magnafloc LT-31 showed best performance compared to magnafloc LT-27 and starch-g-polyacrylamide and guar gum-g-polyacrylamide. The turbidity for magnafloc LT-31, magnafloc LT-27 and starch-g-polyacrylamide copolymer for municipal wastewater reduced from 225 NTU to 12 NTU, 35 NTU and 20 NTU respectively with optimum dosages respectively. These flocculants could reduce colours of the effluents with FeCl3 coagulant. The optimum concentration for magnafloc LT-31, magnafloc LT-27 and starch-g-polyacrylamide were 100 ppm, 200 ppm and 150 ppm with pH 8 respectively.