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The article is devoted to the assessment of the state of lakes in Central Yakutia. Fresh water is a single resource. There are few areas in the world that are not affected by the problems of loss of potential fresh water supplies, deterioration of water quality, and pollution of surface and groundwater sources. The main problems that adversely affect water quality arise, depending on the circumstances, with varying degrees of severity as a result of inadequate treatment of domestic wastewater, poor control of industrial wastewater discharges, loss and destruction of watersheds, irrational siting of industrial plants, deforestation, uncontrolled fallow farming, and unsustainable agricultural practices [7].
The lakes of Central Yakutia, despite their poor study, are actively used by the population of agricultural settlements as a source of drinking water. To compensate for the existing lack of information, the author provides a hydrochemical characteristic, a comprehensive assessment of the water quality of the studied lakes, which are part of 3 rural settlements of the Khangalassky district. A comparative assessment of the results of chemical analysis and bioindication is carried out. For the first time, zonal changes in the total hardness of water, as well as concentrations of calcium and magnesium ions dissolved in water, are established for the study area.
Keywords:lake, hydrochemical characteristics, rural settlement, Central Yakutia, Khangalassky district
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