Baseline data on microplastic pollution in coastal marine sediments along the SW Bulgarian Black Sea coast (2020)

Processed sampling data for microplastics in sediment samples in beach sediments and seabed sediments in sampling stations in Burgas Bay, SE Black Sea. Urban coastal areas (S1- Sozopol Bay) had the highest average MP concentrations (464.44±272.50 MP.kg-1 dry sediment in beach samples, 825.93±396.30 MP.kg-1 dry sediment in seabed samples), while coastal sediments in an area with no local anthropogenic activities (S2, Paraskeva Bay) had significantly lower average MP concentrations (184.44±147.57 MP.kg-1 in beach samples, and 550.62±245.71 MP.kg-1 in seabed samples).