The chemical and trace element composition of water sources in the Orenburg Region

: The chemical composition of drinking water was studied by some indices: total mineralization, oxidability, harshness by different regional economic areas of an angoindustrial region. The content of trace elements, imbalance of which had been found by earlier studies, was determined. Higher water mineralization was ascertained in the central area, higher water harshness and oxidability were in the eastern area. The areas under study showed the inhomogeneous content of trace elements.