“…When compared with worldwide river systems (Table 4), microplastic levels in the surface water of the Tien River was approXimately that same as that of the Qing River, China (170-260 items m -3 ; Wang et al, 2020), and the Seine River, France (3-106 items m -3 ; Dris et al, 2015). Further, it was higher than that of the Chao Phraya River Estuary, Thailand (48 ± 8 items m -3 ; Ta and Babel, 2020), 29 assorted rivers in Japan (1.6 ± 2.3 items m -3 , Kataoka et al, 2019), and Northern Dvina River in Russia (0.004-0.01 items m -3 , Zhdanov et al, 2022), and lower than that of the Orange-Vaal River system in South Africa (0.23 ± 0.27 items L -1 , Weideman et al, 2019), and the Thames river in the United Kingdom (87,750 items m -3 , DevereuX et al, 2022). Sediment in the Tien River also presented higher microplastic levels than that in the Ciwalengke River, Indonesia (1.4-3.5 × 10 -3 items g -1 d.w.; Alam et al, 2019), the Chao Praya River, Thailand (0.04 items g -1 d.w.; Ta and Babel, 2020), the Barrow River in Iceland (172.5 ± 116 items kg -1 w.w., Murphy et al, 2022), and the Qin River in Beibu Gulf, China (0-0.1 items g -1 d.w.; Zhang et al, 2020).…”