| Average estimated groundwater volume, by region, 2010-2014 | Environmental Reporting | Ministry for the Environment | Creative Commons Attribution 3.0 New Zealand | Table | Table | 9461 | 64 | ||
| Average estimated national groundwater volume per year, 1994-2014 | Environmental Reporting | Ministry for the Environment | Creative Commons Attribution 3.0 New Zealand | Table | Table | 7677 | 30 |