Water is an essential element for life on earth and measures to prevent pollution must be a priority. Sources of pollution can be systematized or unsystematized that produce pollution through the uncontrolled introduction of substances into the waters: seasonal sources without sewage; discarded waste without proper storage; pesticides, fertilizers from agriculture. In this paper, the impact of agriculture in Obreja and the neighboring communes is investigated, given that the basic occupation of the inhabitants was and remains agriculture and animal husbandry. In order to determine the water quality in the Obreja commune area, the following harvesting points have been established: 1 Bistra River, 2. Obreja Fountain, 3. Obreja Basin, 4. Iaz Basin and 5. Basin Var. Indicators followed in this paper are: pH, Oxidation, Ammonium, Nitrates, Nitrites, Iron, Chlorine, Total hardness, Number of Coliform Bacteria, Calcium and Magnesium content. 10 water samples were analyzed, collected from 3 localities: Obreja, Iaz and Var in the period 2020-2021. The results obtained by analyzing the water samples in the laboratory revealed that: the nutrient content include water within the second class of quality for the Bistra River, which is due to the agricultural activities in the area; in most areas of collecting the maximum accepted iron limit is exceeded; at some collecting points there are increases above the maximum permissible hardness limit; all the microbiological indicators analyzed were within the limits established by law.

water quality, agriculture impact, pH, oxygen regime, nutrient regime

environmental engineering

Presentation: poster