Water is one of the indispensable elements of life, ensuring the living conditions of people, plants and animals at the same time, intervening in the most varied production activities, either as a source of dynamics, raw materials, working gear or transport environment, etc. Water pollution modifies the physico-chemical and biological conditions of an aquatic ecosystem, a phenomenon that can occur naturally or as a result of human activity. A particular feature of water from the rivers is the self-purification capacity. In this paper attention is paid to flowing waters (rivers), namely, to Bega river. A current issue that attracts the attention of specialists in the field is linked to water pollution caused by agricultural or industrial activities. The present paper presents the quality of the Bega River, namely on the section next to the locality SânmihaiulRomân. Sampling was made 3 times a year, respectively, in January, June and September, in 3 consecutive years, namely, year 2016, year 2017 and year 2018. The analyses were carried out by the Quality Laboratory of the Banat Water Administration and the results obtained were interpreted and compared with the physico-chemical quality standards of the Order 161,from 2006, published in the Official Gazette of Romania which allows water to be framed in a quality class from I to IV. The water samples were taken in January, June, and September for the years 2016, 2017 respectively 2018. The main quality analyzed indicators in the study are: Total chromium, copper, zinc, arsenic, barrier, selenium, cobalt, cadmium, lead, mercury, nickel, total nitrogen, nitrites and nitrates As a result of the analyses it has been noticed that higher overdoses were recorded in nitrites which framed water in IIIrd class quality and cadmium only at the level of 2016. The rest of the indicators are in category I and second, still highlighting the impact of human activity on the quality of the Bega River. Measures should be taken to limit the excess use of fertilizers on farmland, with a view to reducing the amount of nitrites in the water.

water quality, nitrogen regime, heavy metals, human impact

environmental engineering

Presentation: poster