| Ozone concentrations 1996–2013 | Environmental Reporting | Ministry for the Environment | Creative Commons Attribution 3.0 New Zealand | Table | Table | 1727 | 19 | ||
| Ground-level ozone concentrations, Auckland, 2001–16 | Environmental Reporting | Ministry for the Environment | Creative Commons Attribution 4.0 International | Table | Table | 1345 | 8 |