The occurrence of disinfection by-products in municipal drinking water in China's Pearl River Delta and a multipathway cancer risk assessment

► The occurrence of DBPs in 155 samples in three cities was investigated. ► The median THM and HAA levels were 17.7 and 8.6 μg/L, respectively. ► HANs, HKs, CH, and TCNM occurred at low concentrations. ► The cancer risk from mutipathway exposure to THM and HAA was estimated.