Thirty years after the death of Michel Foucault, notwithstanding the fact that his thought has profoundly shaped the contemporary reflection and contributed to move beyond structuralism, the Urban Political Ecology in general and the Urban Political Ecology of water in particular are still dominated by Marxist-inspired theoretical frameworks. This paper aims to provide a theoretical rationale for the development and implementation of a Foucauldian ap-proach to the UPE of water. We show how a Foucauldian approach could shed light on the hydro-social cycle and could be the basis of a specific form of scholarly political engagement.

Abstract. Switzerland appears to be a privileged place to investigate the urban political ecology of tap water because of the specificities of its political culture and organization and the relative abundance of drinking water in the country. In this paper, we refer to a Foucauldian theorization of power that is increasingly employed in the social sciences, including in human geography and political ecology. We also implement a Foucauldian methodology. In particular, we propose an archaeo-genealogical analysis of discourse to apprehend the links between urban water and the forms of governmentality in Switzerland between 1850 and 1950. Results show that two forms of governmentality, namely biopower and neoliberal governmentality, were present in the water sector in the selected period. Nonetheless, they deviate from the models proposed by Foucault, as their periodization and the classification of the technologies of power related to them prove to be much more blurred than Foucault's work, mainly based on France, might have suggested.