This study on land sourced litter (LSL) was commissioned by four associations of the plastics industry in Germany, Austria and Switzerland. The objectives were to:  Gather high-quality data from a detailed literature review regarding the present situation of land sourced litter in the Mediterranean Sea, the North Sea and the Baltic Sea. This data analysis may serve as a long-term reference and provide a basis for subsequent discussions and strategies Display possible research and implementation activities of different stakeholders and behaviour aspects in the field of LSL Pave the way for sound impact assessment of measures to reduce land sourced litter most effective and efficient.