Increasing water stress in Central Europe is a challenge for the iron and steel industry. To face it, IndiWater focuses on the prediction and control of operating status of process water circuits and treatment plants under consideration of innovative online measurement techniques. Zero liquid discharge (ZLD) techniques will be introduced to mitigate the water stress. The proposal IndiWater focuses on these approaches in the context of circular economy and the European Green Deal. Objectives of IndiWater are I.) development of a digital prediction tool and automated water circuits control system, II.) development and application of online NIR measurement, III.) improvement and adaptation of ZLD treatment processes by coupling with the prediction tool and NIR measurement. The progress of the proposal beyond the state of art is focussing for: Industrial Water 4.0, Prediction tool on basis of SIMBA#, Pre-filtration with new modular ceramic flat-sheet membranes and combination of desalting technologies to achieve near ZLD. These innovative approaches and solutions will be tested in two different use cases with complex wastewaters which are typical for the steel industry. The well-balanced consortia of complementary partners from the steel industry, leading R&D companies for the steel production and specialised companies can achieve the addressed added values. IndiWater will lead to a safer water supply due decoupling from climate change, to a prediction tool on basis of the common SIMBA# software for a reliable wastewater treatment plant operation and to a water recovery by innovative and energy saving technologies. Improvements will be assessed by the creation of an LCA which is linked to the prediction tool. The experienced partners coordinated by the applied R&D company VDEh-Betriebsforschungsinstitut (BFI) agreed about the IPR Management and included a risk as well as innovation management in the work plan.