The research was made for evidenced the animal exploitation activities with negative potential for environment. For this reason were located the following work point: on the Ialomiţa river course, Călăraşi county – dairy cow farm; upstream of the farm a group of cows households. At the level of the each work point were taken fresh and fermented manure samples (before field application), liquid manure samples (the sample was taken in the field application moment), water and sediment samples. The water and sediment samples were taken among a latitudinal degree, in flow river sense, for each season (March and September-October).