In the framework of COMMON MED-project, a sampling campaign was carried out during December 2020 along two radials namely: T1 and T2. The findings showed that microplastic particles (MPs), ranging from 0.31 to 4.9 mm. For all samples, white color and fragments are the most common. As well, HDPE and PE are the predominant polymers. The concentrations of MPs varied between 62,095,032 and 260,979,12 items/km² with a density of 4 times greater in the T2 radial, which shows the influence of urban and marina origin on plastic contamination among seaside tourist one.

The macrolitter monitoring was investigated on 3 beaches on Monastir coastal (Palmier, Marina, Karaia) and on Kuriat Island during 4 seasons. The highest abundance and density of macrolitter were recorded on the beaches of Marina (13540 items/100m; 8.49 items m-2) and Karaia (6842 items/100m; 6.11 items m-2) during spring. According to Clean Coast Index, these 2 beaches were classified as extremely dirty whereas Kuriat Island was considered as very clean. Plastic items corresponded to the highest concentration of litter in studied sites and varying between 69% and 89% of total items. Cigarette butts are the most frequent type of debris