| Average estimated groundwater volume, by region, 2010-2014 | Environmental Reporting | Ministry for the Environment | Creative Commons Attribution 3.0 New Zealand | Table | Table | 4965 | 56 | ||
| Average estimated national groundwater volume per year, 1994-2014 | Environmental Reporting | Ministry for the Environment | Creative Commons Attribution 3.0 New Zealand | Table | Table | 3896 | 26 |