Levinа E. S. RussiaSaratovSSU. Department of Biology., 410012, Saratov, Astrakhanskaya str., 83, building. 5, Faculty of Biologyстудентtorgaschkova88@mail.ru Author's articles Оценка экологического состояния реки Волги в окрестностях Саратова Assessment of Self-purification of the Volga River Near the City of Saratov