Where is the cleanest ocean on Earth?

Where is the cleanest ocean on Earth depends on measurement like water clarity, low pollution, and marine protected status, but several remote areas are consistently cited as having cleanest ocean water. The South Pacific Ocean around remote islands like those in the South Pacific Gyre, particularly near Easter Island and Pitcairn Islands, is considered among cleanest due to extreme remoteness from industrial pollution and minimal human population. The waters around Antarctica, especially the Southern Ocean and Weddell Sea, are considered exceptionally clean and pristine due to protection under Antarctic Treaty and low human activity, with very low microplastic levels. For accessible locations, beaches and waters around Maldives, Seychelles, and Palmyra Atoll in central Pacific are noted for crystal-clear water with low pollution. The Mediterranean has cleaner pockets like parts of Sardinia. Scientists measure cleanest by low levels of pollutants, microplastics, and high visibility, often 50 meters plus. The Amundsen Sea off Antarctica is often cited as cleanest. For swimmable tourist destinations, water around the Maldives, Bora Bora, and parts of Iceland and Norway rank very clean. Overall, most remote and protected waters far from industrial centers, especially in South Pacific and Southern Ocean around Antarctica, are cleanest oceans.