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  • This dataset contains age tracer concentrations as measured in NZ groundwater samples through time. Tracers include Tritium, SF6, CFCs, Halon-1301. These tracer concentrations enable estimation of groundwater residence time, using mixing models to convolute input to output concentrations through hydrologic systems (e.g. aquifer, river catchment). Data are continuously added, to cover more areas, and because time series data improve the robustness of age interpretation DOI: https://doi.org/10.21420/JEBK-5288 Cite as: GNS Science. (2021). Groundwater age tracer data set [Data set]. GNS Science. https://doi.org/10.21420/JEBK-5288