This paper aims to open a discussion in the scientific point of view and policy making processes on sustainability of water policies. The social and environmental impact on the Agriculture sector in Southern European countries (Greece, Italy, Portugal and Spain) will be investigated to analyse the adoption of measures taken by decision makers on water policies. The community assets of farmers will have an important role on the implementation of different strategies concerning agriculture water management. The paper will focus on the role of farmer’s participation as central actors of implementation in water policy. Furthermore, the social and the environmental aspects will be addressed.