Water is an important factor in the ecological balance and surface waters pollution with heavy metals is a current problem with serious consequences on health. Heavy metals in small quantities are needed for all vital forms. In the organism cells, metals are presented as cations, but their inclusion is strictly regulated in large quantities because they are toxic. The paper aims is to study Aries river water contamination by determination of heavy metals. The results show exceedances of copper content in the river research-points, and chromium, lead, cadmium and in particular in the Baia de Aries stationary.