In this study, an aqueous solution containing amixture of heavy metal ion Cr(III) were treated by polymerenhanced Nanofiltration using polyethylene glycol as a bindingagent polymer. The performance of PEG in removing heavymetal ion Cr (III) was compared with PEG and without PEGaddition using polyamide Nano filtrationmembrane. Thepercentage rejection of heavy metal ions was studied under thedifferent value of pH, metal ion concentration and flow rate.AtpH 10,percentage rejection of heavy metal ion was highest ataround 99.2%,whereas,at 200ppm concentration and at3(l/hm2)flow rate percentage rejection of heavy metal ion withPEG was highest 99.5%,it was found that PEG gave higherpercentage rejection of Cr(III) ion than without the addition ofPEG.