Occurrence and distribution of antibiotics in coastal water of the Bohai Bay, China: Impacts of river discharge and aquaculture activities

► Some antibiotics were ubiquitous with high concentration in the Bohai bay, North China. ► The antibiotics were mainly from the six rivers discharge around the Bay. ► Antibiotics are commonly used in aquaculture activities around the Bay. ► Aquaculture was suggested to be an important antibiotics source in the Bay.