Introduction. Existing literature indicates that the infant mortality rate is significantly reduced and the water-borne diseases are almost completely eradicated in developed countries where drinking water is effectively chlorinated. Aim of the study. The purpose of this paper is to present the studies, the problems encountered, and the results obtained in the chlorination of drinking water storage tanks in Mersin province. It is also aimed to share the results of the study with other local authorities and the parties in terms of information and different solution proposals. Material and methods.  The General Directorate of MESKI introduced various methods in order to ensure success and the continuity of chlorination of drinking water storage tanks outside the city center. MESKI also took an important step in the use of renewable energy resources due to the dispersed geographical area of Mersin and the problem of electricity transmission line in these places. Results. Approximately 45% of the total 1005 water reservoirs in different capacities located in Mersin province were successfully chlorinated with a solar-powered fully automatic chlorination system. With this new system, the General Directorate of MESKI drastically reduced both chlorine and energy costs and the city of Mersin has the lowest incidence of non-compliance in terms of drinking water audit monitor non-compliance ratios. Conclusions. As a result of all these studies and applications, the General Directorate of MESKI has provided an institution managed by systems rather than people and ensured water quality, which is continuously monitored online by making all necessary improvements in water supply, distribution and quality.  Key words: local authorities, drinking water storages, chlorination, and sanitation