From FY2013 to FY2015, hexabromocyclododecane (HBCD) and benzotriazole UV stabilizers (BUVSs) concentrations in water environments of several cities were investigated by the joint environmental research project, "The survey of the emission sources and destiny of chemicals under Chemical Substances Control Law, in Japan". Though the maximum levels of HBCD in effluent and sediment samples were 160 ng/L and 465 ng/g-dry, respectively, in terms of ΣHBCD, both were lower than the predicted no-effect concentration (PNEC: 0.31 μg/L for water and 860 ng/g for sediment). BUVSs levels in the road dust samples were higher than those in the sediment samples. There were correlations between the BUVSs concentrations and the organic component in the road dust samples.
