June 2017
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The results of chemical analyses of natural water from Lake Beloe and Vozhskaya drainage system (Ryazan oblast) for different seasons (autumn of 2013 and spring–summer of 2013) are given. Oz. Beloe is the deepest lake in the Spas-Klepikovsky raion, Ryazan oblast, with clean water; a unique water body in the central European Russia. It is shown that, by its ecological status, water quality is high and Lake Beloe still remains clean. The results are compared with the characteristics of water from the Vozha River and a drainage channel emptying into it. Keywords: karst lakes, Lake Beloe, hydrological regime, water elemental composition, thermal oxidability of water.