SuWaNu is a research project funded within the EU Commission FP7 framework where one of the objectives is to identify impediments and factors of success for sustainable water treatment and nutrient reuse options. For this purpose several European regional clusters have been framed (in Bulgaria, Germany, Greece, Malta and Spain) while, through a quantitative SWOT analysis, have been identified and quantified the strengths, weaknesses, opportunities and threats of the treated wastewater sector focusing on the economical regional aspects, on research innovation potential and on market exploitation and penetration. The analysis of the contributions of the different clusters included in the SuWaNu project has provided a detailed description of the reclaimed water sector in the European agriculture. After the analysis of more than 200 strengths, opportunities, weaknesses and threats provided by the partners of the project, this study includes a complete description of the use of reclaimed water in the European agriculture. These findings have been used as the fundamental cognition for the development of a joint action plan and several other business plans in the selected regions. A brief discussion on empirical modelling and results, especially regarding the Greek case study, is shown in this paper. A more detailed discussion can be found in the SuWaNu project report, available through the website (http://www.suwanu.eu).