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Tāmaki Makaurau / Auckland marine sediment contaminants. Summary of TR2023/5

Author:  
Hamish Allen
Source:  
Auckland Council Research and Evaluation Unit, RIMU
Publication date:  
2023
Topics:  
Environment

Tāmaki Makaurau / Auckland Marine Sediment Contaminants
Summary of TR2023/5, covering the 2021 monitoring in the Manukau Harbour

Key points:

  • 27 sites in the Manukau Harbour were sampled for concentrations of copper, lead, zinc, mercury, and arsenic.
  • Overall, a relatively low level of metal contamination was observed.
  • Two sites located at the head of the harbour in the Māngere Inlet have slightly elevated zinc levels (ERC-amber levels).
  • No sites in the Manukau Harbour fell into the higher ERC-red category.
  • Changes in the concentration of metals over time at most sites has been relatively stable. ...

A summary of Auckland Council technical report, TR2023/5

March 2023

See also:

Tāmaki Makaurau / Auckland marine sediment contaminant monitoring: data report for 2021

Auckland Council technical report, TR2023/5



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