Carbon dioxide at Baring Head reached 423.1 ppm in late 2025
The CO₂ concentration was 5.5% higher than in December 2016.
Event / data period: 2025-12
Published: · Updated:
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.
- 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
Methodology
Percentage change in the December 2025 concentration from December 2016; a station reading, not a national average.
Updated:
Subjects and places
Subject proposals
- Energy and resourceSuggested
- Preserved editorial category/topic; broad candidate onlywww.stats.govt.nz ↗
- Climate changeSuggested
- Subject suggested from the title or summary: CO₂, Carbon dioxidewww.stats.govt.nz ↗
Geographic references
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- New Zealand · Place role: Coverage · Place type: Country or area · Location precision: RegionalEvidence
- Explicit preserved editorial country/region; no city or national centroid inferredwww.stats.govt.nz ↗