To move away from linear into circular models of production and consumption, there is a need for suitable<br> institutional arrangements, i.e., clear sets of norms and rules regarding the distribution of responsibilities<br> of relevant stakeholders involved in the implementation of water circular economy (WCE). This deliverable analyses the institutional arrangements associated to the water reuse management<br> within and across case studies on the demosites of Project Ô. It aims to assess their preparedness for the<br> implementation of the new water loops as those foreseen with use of Project Ô new technologies. It<br> addresses the potential barriers and challenges to be faced in local contexts, including by the stakeholders<br> and new water users, considering the current water related institutional arrangements and regulations. The analysis is based on existing institutional arrangements and regulations and on structured<br> questionnaires made to local project partners and to selected stakeholders in each demosite. An effort<br> was made to ensure a mixture of experts to provide a fair representation of the perspectives on the<br> arrangements being analysed. Out of the collected data the major drivers and barriers for implementation<br> of water loop were identified.