The holonic paradigm has been widely studied in the context of manufacturing. These productions are discrete type because operations included do not involve continuous evolution variables. A different system class is studied here-hybrid system, which includes systems with piecewise continuous evolution and whose changes are related to the evolution of discrete variables. In this case, a reconfiguration of the system is usually necessary, and holonic paradigm is an appropriate response to the need for flexibility arising. This paper proposes an adaptation of holonic reference architecture on a hybrid system case. The proposed model is composed of the union of the hybrid model and the holonic model, where the proposed controller is represented by the product holon and the order holon, the interface is represented by the logical part of the resource holon, and finally the production system is represented by the physical part of the resource holon. A case study based on a water treatment process is investigated to demonstrate the applicability of PROSA based concepts to a hybrid system.