http://www.marinelitternetwork.org/group/national-marine-litter-associations

National Marine Litter Associations

This group has as objective the exchange of information (exchange of
experience) between national marine litter associations that were
already founded and support for the creation of new national and
regional marine litter associations, aiming at the creation of an
international association (International Marine Litter Association). The
official language of this group is English.