Review article

The paper considers the possibility of assessing the acceptable and dangerous levels of surface water anthropogenic eutrophication on the base of Index of trophical state (ITS). Unlike the natural process, anthropogenic eutrophication leads to secondary water pollution, ecosystems` degradation and the loss of their resource value, first of all, it affects the freshwater ecosystems. This, in turn, creates the problem of freshwater scarcity worldwide. The solution of this global ecological problem requires the development of reliable and affordable methods of assessing of the dangerous level of water eutrophication.