Radibratović, Zorana Milenković, Nenad Cakić, Biljana Obušković, Bojan Đurić, Dušan Abstract: Due to the change in water quality in the reservoirs used for water supply purposes, as well as the poor condition of the potable water treatment plants, there is a need to improve the existing treatment processes to achieve the required efficiency and safety in the operation of the system. This paper describes the causes and issues in the operation of specific plants for processing potable water in Serbia and the applied technical solutions to improve the technological process of water treatment, with a particular focus on resolving the issue of water supply in the City of Užice, caused by the appearance of cyanobacteria in the Vrutci reservoir. https://unilib.phaidrabg.rs/o:1082 Water treatment technology upgrade resulting from water quality changes in reservoirs All rights reserved Jaroslav Černi Water Institute info:eu-repo/semantics/conferenceProceedings application/pdf 1025628 bytes Contemporary Water Management: Challenges and Research Directions, Proceedings of the International Scientific Conference in the Honour of 75 Years of the Jaroslav Černi Water Institute, October 19-20 2022, Belgrade eng 2022