The data release includes surface and groundwater chemistry data from 86 samples (20 surface water, 60 ground water, and 6 ground water duplicates) collected during the baseline water monitoring at the UK Geoenergy Observatories (UKGEOS) Glasgow facility. This release from the British Geological Survey (BGS) covers surface and groundwater samples collected between 14 September 2020 and 20 May 2021 from 6 surface water sites, 5 mine water boreholes, and 5 environmental monitoring boreholes. The samples were then analysed for the concentrations of selected parameters at BGS and other laboratories. It contains a report and 2 data sheets GroundWaterChemData1 and SurfaceWaterChemData2. Further details can be found in the accompanying report https://nora.nerc.ac.uk/id/eprint/532731/ . Detailed methodologies are reported in Fordyce (2021, http://nora.nerc.ac.uk/id/eprint/529818/ and Palumbo-Roe (2021, http://nora.nerc.ac.uk/id/eprint/531098/ ).