Abstract

In this study, by analyzing the shape, type, impact radius, and microbiological effect of terrestrial pollutants around the Kamak Bay area, we tried to contribute to securing the microbiological safety of shellfish. The pollutants in the sea area around Kamak Bay were investigated as 340 places, and the total number of pollutants with flow generation was investigated as 49 places. Among them, nine points (P1-P9) where the concentration of fecal coliform was high and the flow rate was continuously generated were selected as the main land pollution source. As a result of the analysis, the concentration of fecal coliform was intermittently high at P1, P2, P4, P7, and P9, and the impact radius was about 1.5 km or more. As a result of analyzing the microbial pollution level of seawater and oysters in the Kamak Bay area, the fecal coliform pollution level of seawater was analyzed as < 1.8-49 MPN/100 mL, and the geometric mean and 90th percentile were analyzed as < 1.8-2.0 and < 1.8-4.0 MPN/100 mL, respectively. In addition, the fecal coliform, E. coli, and bacterial water pollution levels of oysters were analyzed as < 18-330, < 18-230 MPN/100 g, and 10-3,600 CFU/g. Taken together, major land pollutants flowing into the Kamak Bay area showed intermittently high levels of fecal coliform contamination. However, as a result of experiments on the microbial contamination of Kamak Bay seawater and oysters, it was determined that microbiological safety was secured by meeting all the hygiene standards of seawater and shellfish in Korea, the US sea area management standards for seawater, and the EU safety standards for shellfish. However, points P1, P3, P4, and P7 are considered to require periodic management as the affected radius is confirmed to be more than about 1.5 km due to large flow rates such as rainy weather.