Collection of all water chemistry analysis.

The data was collected by the Helmholtz Centre for Environmental Research - UFZ (Helmholtz-Zentrum für Umweltforschung GmbH - UFZ), the State Office for Flood Protection and Water Management Saxony-Anhalt (Landesbetrieb für Hochwasserschutz und Wasserwirtschaft Sachsen-Anhalt, LHW) and the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB).