Abstract
The impact of Shokarski stormwater canal on the bathing waters quality of Varna Bay located in the northern Bulgarian Black Sea was investigated during 2007–2014. A total of five monitoring stations were selected: three city beaches near the area of discharge of the stormwater canal and two nearby resorts beaches. The water quality was assessed following the requirements of the old EU Bathing Water Directive (BWD) 76/160/EEC and the new BWD 2006/7/EC. The resort beaches exhibited excellent water quality through the whole period. The situation at the city beaches was worst. The “Officers Beach” situated exactly at the area of discharge of Shokarski stormwater canal exhibited concentrations of ammonium and nitrates significantly above the guide value in most of the cases, the lowest compliance with the total coliforms and faecal coliforms guide values and the highest concentrations of Escherichia coli and intestinal enterococci.
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