So, in May 2009, the company was set the maximum concentration of pollutants in discharged wastewater. But until now the plant is adequate treatment of wastewater from a range of contaminants to the environment-friendly performance, resulting in surface water bodies dumped wastewater in excess of permissible concentrations of suspended solids, chloride, sulfate, nitrite ion, nitrate ion , iron and copper.

http://www.samara.aif.ru/society/article/16573