Objective. The aim of the work is the analysis of physico-chemical and microbiological tests of drinking water in the territory of Mladenovac in a three-year period (2021-2023). Methods. The method of work is analytical-descriptive. For the analysis of the water quality in Mladenovac, data from the Annual Reports on the health control of drinking water from the water supply in Mladenovac for the years 2021, 2022 and 2023 were used. Physical, chemical and microbiological tests of drinking water samples are carried out in the City Institute for Public Health from Belgrade, in the Laboratories. Results. The results of laboratory tests of water conducted in 2021 showed that out of a total of 362 tested samples, 292 (80.66%) were physically and chemically defective, while 51 (14.09%) were microbiologically defective. In 2022, a total of 368 samples were tested. From a physico-chemical point of view, 311 (84.51%) samples were health-improper (unsafe), 50 (13.59%) were microbiologically defective. Out of a total of 385 water samples tested in 2023, 273 (70.91%) were physico-chemically defective, and 43 (11.14%) were microbiologically defective. The causes of failure are physico-chemical parameters: turbidity, iron, manganese, ammonia and nitrites (x2=37.0, df=8, p0.001). Regarding the microbiological quality of drinking water, an increased total number of aerobic mesophilic bacteria in 1 ml is observed. Total coliform bacteria, Pseudomonas aeruginosa, faecal streptococci are present (x2=33.1691, df=22, p=0.0595). Conclusion. Analyzes indicate the need for urgent improvement of the water supply situation. Measures should be taken to reduce microbiological contamination and to reduce iron and manganese concentrations and water turbidity.
Pakić et al. (Wed,) studied this question.
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