Denmark including Greenland and the Faroe island, Iceland, Finland including Åland island, Sweden and Norway are parties to this agreement, which covers mutual notification, assistance and aerial surveillance of oil and other chemicals at sea. Very few countries have sufficient resources for combating oil spills and other pollution incidents on their own, and for that reason, it is important that nations cooperate closely with other nations on mutual assistance.

NETHGER is a bilateral agreement between the Netherlands and Germany, which provides a Joint Maritime Contingency plan on combating pollution from oil and other harmful substances in the North Sea.

The Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) was established by international convention in 1982 with the objective of conserving Antarctic marine life. This was in response to increasing commercial interest in Antarctic krill resources, a keystone component of the Antarctic ecosystem and a history of over-exploitation of several other marine resources in the Southern Ocean. CCAMLR is an international commission with 26 Members, and a further 10 countries have acceded to the Convention. Based on the best available scientific information, the Commission agrees a set of conservation measures that determine the use of marine living resources in the Antarctic.

The Bucharest Convention was signed in Bucharest in April 1992, and was ratified by all six legislative assemblies of the Black Sea countries (i.e. Bulgaria, Georgia, Romania, Russian Federation, Turkey and Ukraine) in 1994. It is the basic framework of agreement and has three specific Protocols, dealing with the control of land-based sources of pollution, the dumping of waste, and joint action in the case of accidents (such as oil spills). The implementation of the Convention is managed by the Commission for the Protection of the Black Sea Against Pollution (also sometimes referred to as the Istanbul Commission), and its Permanent Secretariat is in Istanbul, Turkey.

The Mediterranean Coast Guard Functions Forum (MCGFF) is a non-binding, voluntary, independent and non-political forum bringing together representatives from institutions and agencies with related competencies in coast guard functions in the Mediterranean. The aim is to facilitate multilateral cooperation on a wide range of issues such as maritime safety, security and environmental protection activities as well as creating partnerships to share experience and best practices on common problems.

The Bonn Agreement is the mechanism by which ten Governments, together with the European Union, cooperate in dealing with pollution of the North Sea by oil and other harmful substances. The signatories to the Agreement are the Governments of Belgium, Denmark, France, Germany, Ireland, Netherlands, Norway, Sweden, the UK, and the European Union. Spain joined as a Contracting Party in 2019.

The Black Sea Cooperation Forum was established in 2000, between the Coast Guard / Border Authorities of the Black Sea states, namely Turkey, Bulgaria, Romania, Ukraine, Russian Federation and Georgia. The main purpose is to enhance peace, stability and maritime security in the Black Sea area, by increasing regional co-operation, and improving good relationship. Its tasks include enhancing existing interaction among border/coast guard agencies to prevent illegal activities, as well as strengthening the safety and security of navigation in the Black Sea. It conducts counterterrorism and weapon of mass destruction non-proliferation activities. It aims to help improve cooperation in the areas of fishery protection, search and rescue, marine pollution, marine environmental protection, information exchange, personnel exchange programs, joint/shared training.

The Barcelona Convention aims to address in a holistic manner all sources of pollution, which may threaten the marine environment of the Mediterranean and its coastal areas. In particular, the Protocol Concerning Cooperation in Preventing Pollution from Ships and, in Cases of Emergency, Combating Pollution of the Mediterranean Sea is the legal framework within which regional cooperation in the fields of prevention of and response to marine pollution from ships is developing. A regional strategy aims to improve the follow-up of pollution events and monitoring/surveillance of illicit discharges. The 22 Contracting Parties are Albania, Algeria, Bosnia and Herzegovina, Croatia, Cyprus, Egypt, France, Greece, Israel, Italy, Lebanon, Libya, Malta, Monaco, Montenegro, Morocco, Slovenia, Spain, Syria, Tunisia, Turkey, and the EU.

The Baltic Sea Region Border Control Cooperation (BSRBCC) is a flexible regional tool for daily inter-agency interaction in the field of environmental protection. It also aims to combat cross-border crime in the Baltic Sea region, with a particular focus on the maritime environment. Cooperation Partners are Police, Border Guards, Coast Guards and Customs Authorities. The BSRBCC Border Guard Chiefs meet annually and is responsible for the cooperation initiative, and approving the operational strategy. It also has an operational and economic mandate for cooperation. The BSRBCC presidency, which is for one year, is supported by a secretariat, which includes representatives from the last, current and next Presidency, thereby ensuring continuity. The Baltic Border Committee (BBC) prepares and implements the cooperation strategy through joint operations, where national representatives integrate national action and local cooperation into wider cooperation as necessary. Each MS operates a 24/7 National Coordination Centre (NCC), whilst the Presidency maintains an International Coordination Centre (ICC).

The Arctic Council is the leading intergovernmental forum promoting cooperation, coordination and interaction among the Arctic States, Arctic indigenous communities and other Arctic inhabitants on common Arctic issues, in particular issues of sustainable development and environmental protection in the Arctic. The Council Member States are Canada, Denmark, Finland, Iceland, Norway, the Russian Federation, Sweden and the US. In addition, six organisations representing Arctic indigenous peoples have status as Permanent Participants. The Council operates a number of different Task Forces on issues such as Marine Cooperation, Search and Rescue, Oil Pollution Prevention, Oil Pollution Preparedness and Response etc.