Diuron concentrations along shorelines of Ishigaki and Iriomote islands, Japan

Diuron (DCMU; 3-(3,4-dichlorophenyl)-1,1-dimethylurea) concentrations were analyzed at 24 sites along shorelines of Ishigaki and Iriomote Islands in September 2019. The diuron ranged from <0.6 to 32 ng l-1. Slightly high as 19 l-1 observed a fishing port mooring point for boats Ishigaki, respectively, implying contamination likely antifouling paints boats. A slightly concentration (14 l-1) was also found the estuary Arakawa River Island, which implies land sources. In low (≤1 all except site. These results indicate generally levels (below toxic organisms) least timing present study.