“…TCS is a typical emerging contaminant in wastewater treatment plants (WWTPs), and the presence of tcsA genes has been identified in most metagenomic data on activated sludge samples from global WWTPs. Although stringent regulations for the use of TCS in health care antiseptics have been applied in the US since 2017 (USFDA, 2016), TCS can still be detected in water environments in the US and other countries. ,, The concentration of TCS in wastewater and sludge of global WWTPs vary considerably. , In different countries and regions, the concentration of TCS in sewage water and sludge varies from ten to thousands of ng/g . For example, Guo et al reported that the concentration of TCS in the influent of WWTPs varies significantly, ranging from 35.6 to 562,000 ng/L.…”