Variables: dissolved_organic_carbon total_organic_carbon electric_conductivity Keywords: micropollutants high resolution mass spectrometry land use Substances: 4-Formylaminoantipyrin (4-FAA) (WSJBSKRPKADYRQ-UHFFFAOYSA-N) 1-Propanesulfonate (KCXFHTAICRTXLI-UHFFFAOYSA-N)