Variables: dissolved_organic_carbon electric_conductivity Substances: 2-Methyl-4-isothiazolin-3-one (BEGLCMHJXHIJLR-UHFFFAOYSA-N) 2 -2 -Difluorodeoxyuridin (FIRDBEQIJQERSE-QPPQHZFASA-N) Systems: groundwater Keywords: high resolution mass spectrometry micropollutants monitoring