HYDROGEOCHEMICAL MONITORING OF THE WATER INTAKE OF THE NOVOSIBIRSK SCIENTIFIC CENTRE

Analysis of data on the chemical composition of groundwater from the water intake of the Novosibirsk Scientific Centre over a long period of operation (1958-2023), including the results obtained at the Laboratory of Hydrogeology of Sedimentary Basins of Siberia, Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, indicates the stability of the macrocomponent composition of groundwater. The results of many years’ hydrogeochemical monitoring of groundwaters from the Beregovoy-1 site, supplying water to most of the buildings in the higher district of Akademgorodok, and from the Zyryanka site from which water is supplied to the cottage area including Akademicheskaya and Zolotodolinskaya streets, as well as Kirov and Geologov settlements, are presented in the work. Water quality is assessed on the basis of actual sanitary rules and norms adopted in the Russian Federation, State Standards and the criteria currently applied abroad. The waters from these sites have hydrocarbonate magnesium-calcium composition with total salt content within the range of 200-400 mg/dm3, total hardness from 3.8 to 7.7 mg-equiv/dm3. A characteristic feature of water from the infiltration water intake of the Beregovoy-1 site is a high iron content (0.11-7.14 mg/dm3), which is 5-20 times higher than the maximum permissible concentration (MPC), and manganese concentration (0.12-0.61 mg/dm3), which exceeds the MPC by a factor of 8 during some years. Arsenic concentration is almost always slightly above the permissible level, and in particular years it exceeded the MPC by a factor of 2 and more. These features predetermine obligatory water treatment before supplying to the population. The waters of the Zyryanka site meet sanitary quality standards, with the exception of radon level, which can reach 130 Bq/dm3.