National Groundwater Monitoring Programme (NGMP)

The NGMP is a groundwater quality dataset, collected regularly through collaborations with regional council personnel from 110 sites across all 15 regions of New Zealand, since 1990. The network attained national coverage in 1998. Information stored in the NGMP database includes groundwater source location, groundwater quality indicators (e.g. major ions, nutrients, dissolved metals), groundwater age tracer measurements (e.g. chlorofluorocarbons, tritium, and sulphur hexafluoride), mean residence time age interpretation at each site and key hydrogeological properties, where available. Samples are collected according a national, dedicated protocol (published in 1999, updated in 2006, national environmental Monitoring Standards for discrete water quality 2009). The NGMP assets are preserved and enhanced through dedicated quality assurance procedures, maintaining the viability and longevity of the network, adding new samples and data, undertaking research to enhance the assets, and ensuring that curation facilities are appropriate for long-term protection and availability. The NGMP dataset is stored in the broader Geothermal Groundwater Database (GGWD) DOI: https://doi.org/10.21420/NY6Y-VZ29 Cite data as: GNS Science. (2022). National Groundwater Monitoring Programme (NGMP) [Data set]. GNS Science. https://doi.org/10.21420/NY6Y-VZ29