Modern problems of Ukraine's ecology: agricultural pollutants and the quality of drinking water in the city of Kyiv

Abstract

Considered modern problems of Ukraine's ecology. The problem “influence of agriculture on the quality of underground water” is considered in detaile. In 1998-2002, 163 analyzes of underground waters of the aquifer of Cenomanian sediments and the aquifer of Jurassic sediments in the city of Kyiv for the content of persistent chlorine-organic pesticides: DDT and its metabolites, hexachlorocyclohexane (HCCH) and its isomers, aldrin, heptachlor and the fluor-containing pesticide treflane were carried out by the gas-chromatographic method. In the water of the aquifer of Cenomanian sediments and the aquifer of Jurassic sediments of the city of Kyiv, the average concentration of DDT was at the level of 10^-5 mg/dm³. According to our calculations for the year 2024, the concentration of the amount of DDT in the drinking groundwater of the city of Kyiv has decreased by 2-3 orders of magnitude, depending on natural conditions. This indicates that there no new inputs of DDT to natural ecosystems, and retrospective contamination is gradually decreasing. The need to conduct fundamental research of establishing concentrations of new pesticides in groundwater, developing criteria for assessing the danger of co-presence of pesticides of various classes of chemical compounds in groundwater and other natural objects remains relevant. In 2023-2024, 58 wells were examined for the quality of drinking water in Kyiv.