Combining project members and affiliated members, the network currently consists of more than 10 research institutes / universities, as well as two organizations for environmental policy making in seven Baltic Sea countries.

Research institutes / universities:
- Finnish Environment Institute (SYKE), Finland
- GEOMAR Helmholtz Centre for Ocean Research Kiel (GEOMAR), Germany
- Institute of Oceanology Polish Academy of Sciences (IOPAN), Poland
- Leibniz Institute for Baltic Sea Research Warnemuende (IOW), Germany
- Linneaus University (LNU), Sweden
- Marine Research Institute of Klaipeda University (KU), Lithuania
- Swedish Meteorological and Hydrological Institute (SMHI), Sweden
- Swedish University of Agricultural Sciences (SLU), Sweden
- Tallinn University of Technology (TalTech), Estonia
- University of Southern Denmark (SDU), Denmark
- University of Tartu (UT), Estonia
Environmental policy organizations:
- Environmental Protection Agency EPA, Lithuania
- Baltic Marine Environment Protection Commission HELCOM, Finland
