Plastic litter is ubiquitous in the Arctic marine environment and discussions about appropriate mitigations prevail, but knowledge about the importance of specific sources is limited. This project aimed to investigate the loads of plastic from untreated sewage discharged to the sea in Greenland. For this purpose, a method was developed to sample and quantify loads of plastic in different size fractions from wastewater effluents from two locations in the towns of Nuuk and Sisimiut in Greenland. Plastic findings were visually characterized in terms of abundance, morphology, size, and chemically by characterizing the polymer composition using FTIR spectroscopy. The results showed that wastewater is a source of both macro- and micro-sized plastic litter in the Arctic marine environment in Greenland. The most abundant polymer type was PET (PES) in all size fractions. The macro-plastic fraction > 25 mm consisted primarily of wet wipes, but also other sanitary items were found, e.g., condoms and pads. The larger microplastic fractions sizing 300 µm 25 mm showed mainly to be PET fibers and fragments, while the smaller microplastic fraction primarily consisted of PES (including PET). The main mass load (70%) was from plastic items larger than 25 mm, and only 1% was smaller than 1 mm. Among the large items, wet wipes were dominating and constituted 59% of the total emitted plastic by mass. On top of that, our findings suggest that a fraction of the micro-plastic is directly related to the presence of wet wipes. Thus, eliminating wet wipes from the sewage could drastically reduce the emission of plastic in all sizes from sewage in Greenland. A literature review of the retention capacity of wastewater treatment systems showed that even simple preliminary (i.e., grit or filter) or primary treatment (e.g., filter or settling) can reduce plastic from sewage from entering the sea significantly by retaining all particles larger than the grit/filter size, and, additionally, 50-80% of the micro plastic particles, which are retained due to floc formation occurring in concentrated wastewaters. It is recommended to investigate the efficiency of specific filters towards specific wastewater before eventual extensive implementation.