Water Quality Coastal Zone of the Gulf of Finland in 2016 - 2017

Abstract

A laboratory study of the natural waters of the Gulf of Finland near the coastal zones of the main large beaches of the southern coast on the content of pollutants was conducted to identify the main pollutants exceeding the maximum permissible concentrations in the waters of the southern coast of the Gulf of Finland, the allocation of sources of these substances and describe the prospects for bringing these indicators to regulatory concentrations. Laboratory tests were carried out at 4 points: the first point was taken in the dam near the village of Martyshkino, the second is taken in the coastal zone of the beach of the village of Bolshaya Izhora, the third in the beach area, the former pier fish factory, the fourth was taken in the coastal zone of the beach of Sosnovy Bor. The results of laboratory research on presence of polluting substances of natural waters of the coastal zone of the Gulf of Finland are given. The results of the study of water quality at these points showed how and what human activity affects the chemical composition of the natural waters of the Gulf of Finland within the boundaries of the southern coast. A comparative analysis of the results of the study of the waters of the Gulf of Finland, given the statistics of exceedances for 2016-2017. Bringing these substances to the standards of maximum permissible concentrations will give the necessary water quality in the Gulf of Finland, suitable for recreational purposes, including swimming and fishing. A description was given of the main sources that contribute these pollutants to the waters of the Gulf of Finland. The article describes the main problems, the solution of which is necessary to bring the quality of the Gulf of Finland to the normative. The article also describes background, natural pollution peculiar to St. Petersburg and the Leningrad region, reduction of which to the standards established by the law is impossible in consequence of the specifics of the composing soils of this area.