Where is the most dirtiest ocean?

Where is the most dirtiest ocean depends on type of pollution measured, whether plastic, chemical, or sewage, but several areas are considered most polluted. The most dirtiest ocean in terms of plastic pollution is often considered to be the Pacific Ocean, specifically the Great Pacific Garbage Patch located between Hawaii and California, which is massive collection of floating plastic debris, microplastics, and trash trapped by ocean currents, estimated to contain over 1.8 trillion pieces of plastic. In terms of overall marine pollution including industrial chemicals, sewage, and oil, the Indian Ocean, particularly the Bay of Bengal and Arabian Sea near densely populated coasts of India and Southeast Asia, is heavily polluted due to river discharge carrying industrial waste and untreated sewage. The Atlantic Ocean's Gulf of Mexico has large dead zone due to agricultural runoff. For dirtiest sea, the Mediterranean Sea is often cited as heavily polluted due to being enclosed, with high plastic and sewage concentration. For most polluted coastal waters, areas near major rivers like Ganges in India, Yangtze in China, and Citarum River in Indonesia are extremely polluted. So while no single ocean is dirtiest everywhere, Pacific Ocean's garbage patch and coastal waters of Indian Ocean near South Asia are among most polluted.