| Average estimated groundwater volume, by region, 2010-2014 | Environmental Reporting | Ministry for the Environment | Creative Commons Attribution 3.0 New Zealand | Table | Table | 6555 | 62 | ||
| Average estimated national groundwater volume per year, 1994-2014 | Environmental Reporting | Ministry for the Environment | Creative Commons Attribution 3.0 New Zealand | Table | Table | 5085 | 29 |