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This article is about the importance of sanitary and hygienic examination of water complexes, in particular, swimming pools and water parks. There is an increasing demand for visiting such water complexes in Ukraine, both for sports activities and for leisure activities. The focus of this article is on the sanitary and hygienic examination and survey of pool water, which is treated with sodium hypochlorite (obtained by chemical way). Material and methods. The studies were carried out for 10 weeks, including a series of water samples, which were taken during the quarantine period, when swimmers were prohibited from visiting the pool. This situation made possible to make a comparative hygienic assessment of the effect of workload on the water condition in the pool and the effectiveness of disinfection. There was also a short review and characteristics of hypochlorite A, which was obtained in chemical way, its advantages and disadvantages as a disinfectant. The article analyzes the data obtained during the sanitary and hygienic survey of the pool of the swimming pool of the national technical university, their statistical processing, and comparison with the current regulatory documents of Ukraine and some other states. The data obtained in the course of a series of studies indicated a significant human influence on the state of water in the pool, which once again indicates the importance of health education of the population and visitors in swimming pools and water parks, in particular, the need to take a shower before swimming, after using the toilet, etc.; the need for training the right culture of visiting different water objects. Particular attention should be paid to swimming pools frequented by children, as they often do not have sufficient hygiene skills, or due to age cannot constantly monitor urination, so, as a rule, it`s an acute issue of large amounts of chloramines in swimming pools for children. Conclusion. In particular, a statistically significant difference was obtained in terms of ammonia and ammonium ions (in total), which indicated a significant influence of visitors on this parameter. And, as you know, organic impurities (sweat, urine, cosmetics remains etc.) that get into the water together with the swimmers, react with chlorine and form chloramines, which can negatively affect the health of both the visitors and the staff. This must be taken into account while changing the workload on the pool and choosing the dose of disinfectant

Using Sodium Hypochlorite as the Main Disinfectant in the Swimming Pool of National Technical University Sports Complex