In recent years, antibiotic pollution has become more serious in the coastal waters of China. This paper summarizes the distribution of antibiotic pollution in the coastal waters of northern China (Bohai Bay, Laizhou Bay, and the northern Yellow Sea coast), calculates and evaluates the environmental risk level. It was shown that 5 types of 29 antibiotics were detected in the coastal waters of northern China, including 13 sulfonamides (SAs), 5 fluoroquinolones (FQs), 5 macrolides(MLs), 4

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... lines(TCs), 2 chloramphenicols(CPs) and 1 sulfonamide synergist, with the highest frequency of SDZ and SMZ detection. The average concentrations of antibiotics in Laizhou Bay and Bohai Bay are significantly higher than North Yellow Sea Coast, with a total average of 210.5 ng/L and 180.15 ng/L, respectively. The maximum concentration of antibiotics appeared in Laizhou Bay, with a TPM of 330 ng/L. The Environmental Risk Index shows that in terms of environmental risk, Laizhou Bay>Bohai Bay>North Yellow Sea Coast. SMX has high environmental risks, NOR, ENRO, and RTM have moderate environmental risks.