Volga river Assessment of Self-purification of the Volga River Near the City of Saratov Authors: Torgashovа O. N., Levinа E. S., Qahramanov S. G. Assess the degree of pollution and natural purification of the water environment of the Volga river near the city of Saratov. Defined indexes pollution and natural purification of the water and set classes quality of the aquatic environment.