ECOLOGICAL AND HYGIENIC ASSESSMENT OF WATER RESOURCES IN THE MINING AREAS OF THE REPUBLICS OF BASHKORTOSTAN AND KAZAKHSTAN
The article presents the ecological and hygienic assessment of surface and ground waters in the mining areas of the Republics of Bashkortostan and Kazakhstan. Water bodies used for household needs of the population, fishery and recreation purposes are characterized by a high concentration of manganese, iron, zinc and copper. Drinking water from sources of decentralized water supply in certain areas does not meet hygienic requirements and is characterized by high hardness, elevated levels of iron, calcium and nitrates.