Most of seawater environmental elements showed highly significant positive correlation with each other. It is clear that DIN, PO4–P, COD, DO and pH were shown higher Pearson correlation coefficient with each other, which might be related to terrestrial pollution sources. The moderate correlation of oil and Hg could indicate that they are sourced from oil wells or channel sewage. A significant positive correlation is verified for Hg with Cu indicates industrial wastewater discharge