Clean C's focus is on beach clean-ups. With the tagline, Community, Coastline, Cape Town, Country, they aim at Community upliftment through community involvement.

Clean Coast Bonaire organizes monthly coastal clean ups combined with citizen science, using the OSPAR Marine Litter Monitoring protocol to collect data along with marine debris. Cleanups are generally scheduled for the 2nd Sunday of the month, with volunteers collecting and analysing the litter washed up on the island's beaches and coves. Initiated in 2018 by Boneiru Duradero and WWF-NL, Clean Coast Bonaire participates in regional conversations regarding harmonization of marine litter monitoring. See the website for further info about the work being done co-ordinating this ongoing effort to combat marine litter.

Clean Coasts engages communities in the protection of Ireland’s beaches, seas and marine life. The programme is operated by the Environmental Education Unit of An Taisce and is currently funded by the Department of the Housing, Planning, Community & Local Government and Fáilte Ireland. Clean Coasts is made up of two main elements; Clean Coasts Volunteering and the Green Coast Award. They organize 100s of beach clean-ups each year, with thousands of volunteers, removing large quantities of marine litter from the coastline, and generally promote and facilitate clean-ups and marine litter surveys.

Since 1984, Clean Ocean Action (COA) has worked and continues to work to stop ocean pollution in the US, specifically in the waters off the New Jersey and New York coast. This includes campaigns against identified source of pollution, and advocating for environmentally sound solutions. Their campaigns are aimed at reducing plastics, litter and toxins that pollute waterways and beaches and which affect marine life, protecting the coast from oil and gas drilling in the ocean, and raising awareness of the issues. It is a broad-based coalition of 125 active boating, business, community, conservation, diving, environmental, fishing, religious, service, student, surfing, and women's groups, known as "Ocean Wavemakers".

Started by two teenagers in 2019, CleanSea's mission is clean the oceans and so to preserve marine life. This they do by removing trash from the ocean along Sweden's west coast, via coastal clean-ups, collecting plastic floating in marinas and sometimes diving to pull trash from the ocean floor. 22 000 kgs removed thus far (June 2022)

Clean Sea Life was an awareness raising program on marine litter uniting all marine enthusiasts in Italy – divers, yachtsmen, fishermen, beach goers, students and citizen – in the protection of the Mediterranean sea. It was started in 2016, with an end date of 2021. The project team engaged 170 000 people in clean up and dissemination activities, over four years. Nearly 1 000 clean-up operations were organised, both large and small, of which half were organised by stakeholders themselves, along with around 1 000 dissemination events. The project team organised several large events to clean beaches and the seafloor, and a huge quantity of waste and plastic garbage was removed (about 112 tons).

Clean Surf Project creates awareness to the devastating cause of littering especially plastic and polystyrene products and the impact it has on our ocean life. They organize beach cleanups

Clean Up Australia Limited is an Australian environmental conservation organisation. An avid sailor, Ian Kiernan AO was shocked and disgusted by the pollution and rubbish that he continually encountered in the oceans of the world, and established Clean Up Australia, to stop plastic and other pollution ending up in the sea.

Clear Blue Sea is an non-profit organization with the stated mission 'to cleanse the oceans of plastic pollution'. To achieve this, they have developed a semi-autonomous and solar-powered device, Floating Robot for Eliminating Debris, FRED, which comes in various versions. Clear Blue Sea has an extensive internship programme, giving opportunities to participate in many different aspects of the organization, including engineering, robotics, merchandise design, administration, education, community projects.

The main goal of CCB is 'to promote the protection and improvement of the Baltic Sea environment and natural resources'. In 1990, non-governmental environmental organizations from the countries of the Baltic Sea Region established Coalition Clean Baltic (CCB)and at present consists of 27 member organizations from Belarus, Finland, Russia, Estonia, Latvia, Lithuania, Poland, Germany, Denmark, Ukraine and Sweden. The CCB member organisations combined have over half a million members in all countries around the Baltic Sea.

Coastal Clean-ups PE is a local initiative aimed at cleaning up the coastline around Port Elizabeth in the Eastern Cape in an effort to better protect and conserve marine life, and educate the community on the effects of litter on the ecosystem.

Coastwatch Europe (CWE) protects wetlands by raising public awareness of their value, and demonstrating practical ways to save them. CWE is an international network of environmental groups, universities and other educational institutions, who in turn work with local groups and individuals around the coast of Europe. Coastwatch Europe has participated at hundreds of events since the 1980’s, facilitates surveys of the coast, litter, seaweed, and advocates for Marine Protected Areas, amongst other actions.