Variables: dissolved_oygen dissolved_organic_carbon total_organic_carbon pH Keywords: micropollutants high resolution mass spectrometry pesticides metabolites Systems: groundwater Substances: 4-Formylaminoantipyrin (4-FAA) (WSJBSKRPKADYRQ-UHFFFAOYSA-N) 1-[(4-Chlorophenyl)phenylmethyl]piperazine (UZKBSZSTDQSMDR UHFFFAOYSA-N) 2 -2 -Difluorodeoxyuridin (FIRDBEQIJQERSE-QPPQHZFASA-N)