COMPREHENSIVE ASSESSMENT OF THE CONTENT OF PESTICIDES, ORGANOCHLORIDES AND ORGANIC TOXICANTS IN THE WATER OF THE VERKHNETOBOL AND KARATOMAR RESERVOIRS IN THE NORTHERN REGION OF THE REPUBLIC OF KAZAKHSTAN

Abstract

The article presents the results of comprehensive studies of the Verkhnetobol and Karatomar reservoirs in Kazakhstan, focusing on the content of pesticides, organochlorides, and organic toxicants such as phenol, petroleum products, and surfactants. Various organochlorine pesticides (alpha, beta, and gamma isomers of HCH, heptachlor, DDT, DDE, DDD, aldrin, hexachlorobenzene, lindane, 2,4-D) were analyzed, as well as levels of bromodichloromethane, dibromochloromethane, carbon tetrachloride, benz(a)pyrene, atrazine, simazine, phenol, formaldehyde, and surfactants. Laboratory studies were conducted according to state, interstate, and international regulations on water sampling, quality control, and toxicology of drinking and natural waters using physico-chemical methods.
There were no exceedances of the MPC standards for the content of pesticides, organochlorides and organic toxicants. According to the requirements of the unified water quality classification system of the Republic of Kazakhstan, the content of the studied toxicants does not exceed the values of the indicators of the first and second classes of water quality. The waters of these water use classes are suitable for all categories of water use. In case of use for household and drinking purposes, simple water treatment methods are required.
The legal and regulatory documents governing state environmental water control in Kazakhstan and scientific recommendations on the quality and toxicology of drinking and natural waters, including hygienic standards for economic, drinking, and cultural use, are considered.
The results serve as reference data and methodological recommendations for assessing reservoirs in the temperate climatic zone for pesticides and organic toxicants.