Where does pollution come from?
The majority of pollutants that make their way into the ocean come from human activities along the coastlines and far inland. One of the biggest sources of pollution is nonpoint source pollution, which occurs as a result of runoff. Nonpoint source pollution can come from many sources, like septic tanks, vehicles, farms, livestock ranches, and timber harvest areas. Pollution that comes from a single source, like an oil or chemical spill, is known as point source pollution. Point source pollution events often have large impacts, but fortunately, they occur less often. Discharge from faulty or damaged factories or water treatment systems is also considered point source pollution.
The impact of marine pollution on seafood.
Heavy metals and other contaminants can accumulate in seafood, making it harmful for humans to consume. Microplastics can be ingested by fish and other species that filter their food out of the water. With more than one-third of the shellfish-growing waters of the United States adversely affected by coastal pollution, it’s important for NOAA and it’s partners to study the impacts of microplastics and harmful contaminants in seafood. There is ongoing research around the country focusing on the potential risk to wildlife and humans from debris exposure and ingestion. NOAA monitors seafood contamination and provides safety tips through the FishWatch program.
