The purpose of the research is to develop measures for the protection of the Zeravshan river, which is used as an industrial and drinking water supply for the population of several regions of the Republic. Studies have established that the main source of river pollution is industrial enterprise «Navoiazot», which produces mineral fertilizers for needs of agriculture. Discharge of wastewater into the water, leads to pollution of water, and the quality does not correspond to the state standard specification about sources of centralized drinking water supply, about hygienic, technical requirements. At the same time, harmful chemicals are found in the water of the Zeravshan river, which are 2...9 times higher than the MPC installed on them. The medium-term forecast showed that by 2025 the ecological state of the Zeravshan river will not be improved, due to the fact that the production of mineral fertilizers is planned to be increased. In this regard, recommendations on the protection of the Zeravshan river have been developed, which will help to improve the monitoring of the state of the water body and improve the conditions of water use of the population.

The article is devoted to addressing issues related to improving the monitoring of sources of household drinking and cultural-domestic water use of the population. With this purpose, experiments were carried out on models of reservoirs. The results of experimental studies has allowed to substantiate the permissible content of enterococci (Str. Faecalis) in the amount of 100 microbial cells in 1 liter of water reservoirs of drinking water and staphylococci (St. Aureus) – 500 microbial bodies in 1 liter in water bodies recreational purpose. To ensure safe water is necessary, along with carrying out mandatory microbiological tests for ectoparasiticide E. coli, E. Coli, should also be quantified in water bodies of different categories, the presence of enterococci (Str. Faecalis) and staphylococci (St. Aureus).

The following article describes the results of scientific research carried out during the period 2015-2017 years, which was devoted to assessing the efficiency of population’s centralized water supply systems, the quality of drinking water and predicting anthropogenic impact on the quality of the Chirchik and Akhangaran rivers’ water. It was realized that the level of supplying drinking water to population and the efficiency of water supply systems do not fully meet the requirements. The quality of drinking water and sources of water supply in some regions do not meet the standard requirements. As a result, the recommendations on modernization, increasing the efficiency of water supply systems and improving drinking water use conditions were developed in the Republic.

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