Identification of organic xenobiotics in urban aquatic environments using time-of-flight mass spectrometry

► Organic xenobiotics in urban and suburban water samples were analysed using non-target and post-target analysis. ► Compound identification was based on the accurate mass data collected with GC-TOF-MS. ► 36 and 18 compounds were tentatively identified in the non-target and post-target analysis, respectively. ► The highest numbers of compounds were identified from the wastewater and stormwater samples. ► The combination of non-target and post-target analysis proved a useful tool in tentative identification of xenobiotics.