Data collected from watercourses in Galloway from January 2023 – January 2024. The data takes the form of water quality measurements from 13 sites, along with weather data at the time of sampling, and soil coverage data from the sampled catchments. The water quality parameters measured are pH, dissolved organic carbon (DOC), Single UV absorbance at 254 nm (SUVA254), absorbance spectral slope from 275 – 295 nm, nitrate concentration, turbidity, rainfall, air temperature and percentage soil coverage. The data also includes the project supplementary information file