# Carbon dioxide at Baring Head reached 423.1 ppm in late 2025

> The CO₂ concentration was 5.5% higher than in December 2016.

- Canonical URL: https://newsverum.com/en/news/new-zealand-baring-head-carbon-dioxide-2025
- Publisher: Newsverum
- Section: Energy
- Country: New Zealand
- Published: 2026-10-04T14:04:24+00:00
- Updated: 2026-10-07T00:55:14+03:00
- Event / data period: 2025-12
- Other editions: [Türkçe](https://newsverum.com/tr/news/new-zealand-baring-head-carbon-dioxide-2025.md), [العربية](https://newsverum.com/ar/news/new-zealand-baring-head-carbon-dioxide-2025.md), [Français](https://newsverum.com/fr/news/new-zealand-baring-head-carbon-dioxide-2025.md), [Español](https://newsverum.com/es/news/new-zealand-baring-head-carbon-dioxide-2025.md), [Deutsch](https://newsverum.com/de/news/new-zealand-baring-head-carbon-dioxide-2025.md), [Português](https://newsverum.com/pt/news/new-zealand-baring-head-carbon-dioxide-2025.md)

Stats NZ’s indicator published on 2 October says atmospheric carbon dioxide at the Baring Head monitoring site near Wellington reached 423.1 parts per million in December 2025. That was 5.5% above December 2016.

Baring Head is a monitoring station measuring carbon dioxide, methane and nitrous oxide. The reported result describes the reading at that location; it should not be treated as a spatial average for all of New Zealand.

## Data

### Carbon dioxide at Baring Head reached 423.1 ppm in late 2025

Stats NZ’s updated indicator for atmospheric CO₂ measured at Baring Head.

Methodology: Percentage change in the December 2025 concentration from December 2016; a station reading, not a national average.

| label | value | unit | period | basis |
|---|---|---|---|---|
| CO₂ concentration change, December 2016–December 2025 | 5.5 | percent | 2025-12 | observed |
| Atmospheric CO₂ concentration, December 2025 | 423.1 | parts per million | 2025-12 | observed |

Sources: <https://www.stats.govt.nz/indicators/greenhouse-gas-concentrations-data-to-2025/> · Download data: [JSON](https://newsverum.com/api/v1/articles/new-zealand-baring-head-carbon-dioxide-2025/data/co2-concentrations-at-baring-head?lang=en&format=json) · [CSV](https://newsverum.com/api/v1/articles/new-zealand-baring-head-carbon-dioxide-2025/data/co2-concentrations-at-baring-head?lang=en&format=csv)

## Sources

- [Stats NZ](<https://www.stats.govt.nz/indicators/greenhouse-gas-concentrations-data-to-2025/>) (Source checked: 2026-10-04; Published: 2026-10-02)

## Correction history

- 2026-10-07T00:55:14+03:00: German and Portuguese editions and translations of the data and correction explanations have been added to this article.

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