The results of BOD-5 determination at the measuring stations Bezdan and Pančevo indicate a presence of biodegradable organic matter and classify the water into the A2 category, while the value of 1.9 mg/L at Radujevac indicates a decreasing trend of biological consumption of oxygen and an improvement of water quality.
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Evaluation of the ecochemical status of the Danube in Serbia in terms of water quality parameters.
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The sentences
The total nitrogen oxides and orthophosphates as an indicator of pollution by chemical industry are correlated showing a negative trend towards the exit profile of the river and a negligible deviation from A1 category.