This study compares the performance of two nanofiltration (NF) membranes and two antiscalants injected upstream of the NF system. The pilot unit is installed at the Choisy-le-Roi drinking water treatment plant (DWTP) located in the suburbs of Paris, France on behalf of the Syndicat des Eaux d?Ile de- France (SEDIF). This DWTP treats river water un...