Key points:

• Sediment contaminants (metals) were sampled at 19 sites across the Central Waitematā Harbour
• The spatial pattern of contamination remains consistent with previous monitoring
• Higher concentrations of several metals were found in the upper reaches of sub-estuaries and at the sheltered mouths of creeks along the southern shoreline
• Sites along the more exposed northern shoreline and in the body of the harbour show relatively low levels of metals

Summary of Auckland Council technical report, TR2024/8

October 2024

See also

Tāmaki Makaurau / Auckland marine sediment contaminant monitoring: state report for 2023