A B S T R A C TAs almost all Mediterranean countries are facing water scarcity problems today, water losses in drinking water supply networks have grown to an urgent problem, needing immediate confrontation, representing a too valuable to be neglected water potential. The first step towards water losses reduction is the water supply network performance assessment process. The most commonly used methodology is the one introduced by the International Water Association (IWA), including the International Standard Water Balance and a list of Performance Indicators (PIs). Five years after the second PIs handbook edition was launched increasing the PIs included to 170 from 133 of the first edition, there is a need to re-evaluate them, including also new PIs adapted/focused to regional conditions and addressing other important topics such as environmental issues. The paper presents a new set of water losses-related PIs, focused on areas facing water scarcity conditions met in the Mediterranean countries, forming a solid basis for an integrated Decision Support System (DSS) to evaluate water supply networks and prioritize alternative water losses reduction strategies. The new set includes 75 out of the 170 IWA PIs and 42 new proposed PIs. The new PIs set is formed, selecting the most appropriate existing PIs and suggesting new ones. An integrated approach using a survey among local stakeholders in each partner's country is used. The platform and the basic components of this user-friendly DSS tool are also being presented here.

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Cross-border water resources and drinking water supply management are among the basic concerns for almost all Adriatic Sea countries. Adopting measures such as developing common methodologies, tools and techniques addressing water quality and quantity issues, water losses and pricing policies is a top priority. Regarding the harmonization of procedures and legislative framework, the requirements of the Water Framework Directive 2000/60 are respected. An approach to face these challenges is being developed through the cooperation of several organizations and stakeholders involved in the implementation of the DRINKADRIA project. This paper discusses its specific objectives and outputs linked to: (a) promotion of sustainable provision of drinking water, by setting joint cross-border recommendations on drinking water resources management; (b) undertaking of methods and technologies, through the implementation of pilot actions; and (c) stimulating capacity building, through the exchange of know-how and the development of a regional network of water supply experts. A set of standardized protocols on the applicable management of water supply systems and resources in the Adriatic area is being developed and tested by the beneficiaries involved. The relevant pilot actions aim at improving water supply and water resources management. Eventually, DRINKADRIA's measurable results will support decision makers in the adaptation of effective and efficient measures and policies.

The SCF provides a well-structured approach for European pollutant source and release classification and management. With further optimisation and demonstration testing, the SCF has the potential to be fully implemented throughout Europe.