Definition of the hydrogeochemical background of the Novosibirsk urban agglomeration natural waters

Based on the results of field and chemical-analytical work in 2018-2021 for the first time, the characteristics of the hydrogeochemical background for the natural waters of the Novosibirsk urban agglomeration were substantiated. It has been established that the background concentrations of chemical elements in surface and ground waters decrease in the order from Si to In. Hydrogeochemical anomalies were established in the distribution of As, U, Ti, Li, Al, Si, Mn, Fe, Br, I, Sb, which served as the basis for compiling a map of the degree of pollution of the natural waters of the city of Novosibirsk. Among the surface waters, the most polluted are the waters of the rivers: Inya (near the village of Novolugovoe), 2nd Eltsovka (near the Chemical Concentrates Plant), Plyushchikha (near Vilyuiskaya Street), Eltsovka (in Nizhnyaya Eltsovka), Kamyshenka (in Inyushensky Bor), as well as rivers Ob (in the Zaeltsovsky forest). It should be noted that the concentrations of hazardous elements in the Kamyshenka, Plyushchikha and 2 Eltsovka rivers decrease towards their mouths. The least polluted with toxic elements were the waters of the Tula and Kamenka rivers, the studied lakes and backwaters, the Gorsky and Tulinsky flooded quarries, as well as the samples taken in the standpipe near the Bugrinsky bridge.