Abstract: Freshwater saving and wastewater reduction plays an important role in industrial sustainable development. To reach such a goal, target-oriented pinch analysis is required to determine the targets of minimum water usage, minimum regeneration water flowrate and wastewater discharge of water-using networks. The aim of this paper is to present a water pinch analysis approach which can help process analysts to target the minimum regeneration water flowrate at a fixed outlet concentration. Based on the diagrams of cumulative load versus cumulative flowrate, the detailed plotting and algebraic procedures for the composite curves are proposed. A hypothetical example is presented to illustrate the proposed approach.