Abstract
The presence of water it is an indispensable condition in the apparition and development of life on earth. Water is the main element in sustaining the fields which are responsable for social and economical development of a country. The examination of me water quality in four control points on the Siret river, from biological and bacteriological points of view, established the affiliation of the river to the beta mazosaproba area. This fact is owing to medium level of organic pollution that overtakes the admitted limit during four years with 30%.
Cuvinte cheie
water surface
biological index of pollution
cleaning degree
biotic index
saprobiological characterization.