The fourty-four Wastewater influent and three quality control samples were analyzed with LC-HRMS. Briefly, samples were collected over a time window of 24 hours, using on-site autosamplers set to use the optimized conditions described by Ort et al. These samples were filtered, spiked with 10 ng L -1 of 19 labeled internal standards, and stored frozen until analysis. For analysis, 10 µL of the sample was injected on a biphenyl column at 45 • C and separated using a 10-minute gradient from 5 to 100% methanol with 0.1% formic acid. The eluent was analyzed using a QToF in positive ion mode with a mass range of 50 to 600 Da and collision energy of 10 eV. Further details on the analysis are provided elsewhere.