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Tāmaki Makaurau / Auckland marine sediment contaminant monitoring Manukau Harbour 2024. Summary

Author:  
Hamish Allen
Source:  
Auckland Council Environmental Evaluation and Monitoring Unit
Publication date:  
2025
Topics:  
Environment

Extract

Key points:

  • Sediment contaminants (metals) were sampled at 14 sites across the Manukau Harbour.
  • All sites except Anns Creek showed relatively low metal concentrations within the ‘green’ sediment quality guideline, indicating minimal impact on sediment-dwelling animals.
  • The state of metals over time at most sites has remained stable, however sites in the Māngere Inlet have shown improvements in copper, lead and zinc over a long time period.

A summary of Auckland Council technical report, TR2025/33

 

Auckland Council, December 2025

See also

Tāmaki Makaurau / Auckland marine sediment contaminant monitoring state report 2024. Manukau Harbour.

Auckland Council technical report, TR2025/33



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