The aim of the European Catalogue of Information and Communication Technologies (ICT) Water Standards and Specifications is to support the Action Plan for Water Services in the context of the Digital Single Market as well as the Rolling Plan of the European Commission for digitalisation of the water management. More specifically, the objectives include mapping of the existing Water Management Platforms, architectures and standards, gap analysis, priorities and feasibility of the integration, interoperability, and convergence of different technological solutions. The document contains: 1. Analysis of the water digitalisation level in Europe; 2. Principles for standard and specification assessment; 3. Coordinated efforts of the relevant stakeholders and end-users through different projects that could be used as use-cases for standards’ development; 4. Proposed changes to the European Commission Rolling Plan for ICT standardisation in smart water management.