The peculiarities of groundwater flow formation in dry conditions were analyzed. The infiltration windows in the depressions of the relief occupying 10-15 % of the territory have been revealed. Up to 90 % of groundwater supply passes through them. The deficit of water resources has caused deep groundwater occurrence and slow water movement in aeration zone and groundwater. The importance of the aeration zone and vegetation cover in the formation of the chemical composition of groundwater has increased.
