ECOLOGICAL ASSESSMENT OF GROUNDWATER CONDITION OF BERDYCHIV DISTRICT OF ZHYTOMYR REGION

Abstract

The purpose of the study is to assess the state of groundwater in Berdychiv raion of Zhytomyr region, used by the population as drinking water supply. Methodology. Drinking water samples were taken from sources of decentralized water supply in the territory of the new enlarged Berdychiv raion. Analytical studies of water samples were performed according to generally accepted methods, namely: pH – potentiometric method, nitrate content – ionometric, iron content – photocolorimetric, total hardness – titrimetric method. The scientific novelty is to assess the groundwater of Berdychiv raion by determining their quality class and the coefficient of total pollution. Conclusions. It is established that in drinking water of sources of decentralized water supply located in the territory of Berdychiv raion, excess of average content of nitrates is revealed in 61% of the selected samples, discrepancy of the standard of hydrogen indicator towards its decrease in 5,5% of the selected samples, iron content in 20%. m and a total stiffness of 46.2%. The calculated value of the water quality index varies between 2 – on average values corresponding to “good”, clean water of acceptable quality to 3.85 – on the worst values, which refers water to “limitedly suitable” undesirable quality with a bias to the class “satisfactory”, slightly contaminated water, acceptable quality. The value of the total coefficient is set at 4.5, which indicates a “fairly clean” water, and the ecological state of the environment is defined as favorable. The largest contribution to groundwater quality is made by nitrates, the average content of which is 2.6 times higher in drinking water.