Brine graduation towers represent a significant component of health resort infrastructure, predominantly functioning as inhalers. The operation of these devices is predicated on the generation of a salt aerosol, which exhibits properties analogous to those of a seaside microclimate. These properties are conducive to the prevention and treatment of respiratory diseases. In recent years, however, there has been an intensive development of municipal micro-graduation towers, which raises legitimate concerns about the sanitary safety of their use. Whilst the majority of publications concentrate on the design, principles of operation, and health benefits of brine graduation towers, relatively few studies point to the potential risks associated with their operation. The objective of this study is to draw attention to these risks. It presents the results of our own research, which involved the analysis of microbiological contamination of brine circulating in a closed-cycle municipal graduation tower and the mist inhaled by people. The innovative nature of this study renders it groundbreaking within the context of the discussion on the proper operation and legitimacy of the construction of municipal micro-graduation towers. Our research related to the detection of pathogens in brine and mist used for inhalation, as well as the lack of legal regulations concerning the operation and sanitary supervision of this type of installation, has prompted the Chief Sanitary Inspectorate (Główny Inspektorat Sanitarny, GIS) to draw attention to this problem. At present, the GIS is planning to develop recommendations for the operation of micro-graduation towers for their owners and managers, rules for the safe use of these facilities by the public, and rules for their supervision.