The data set contains lab-analyzed water parameters from three locations at Lake Neusiedl in Austria, sampled weekly from late March to mid-July 2021: Channel (CH), Reed belt (RB), and Open water/Lake (OW). From those samples, the following parameters were analyzed in the lab and reported here: Nitrate (NO3_-), nitrite (NO2_-), ammonium (NH4_+), orthophosphate (PO4_3-), sulfate (SO4_2-), total dissolved nitrogen (TDN), dissolved inorganic carbon (DIC), dissolved non-purgeable organic carbon (NPOC). Format of datset: CSV Temporal interval: weekly Temporal coverage: March - July 2021 Coordinates: Lat. 47.769°N, Long. 16.758°E, 116 m asl The data set corresponding to the publication: Baur, P.A.; Henry Pinilla, D.; Glatzel, S. (2024): Is ebullition or diffusion more important as methane emission pathway in a shallow subsaline lake? Science of the Total Environment. 912, 169112. https://doi.org/10.1016/j.scitotenv.2023.169112