Zone 6: Outer Harbour
Water quality in the Outer Harbour was assessed as good with most indicators complying with water quality objectives. Localised elevations in algal biomass were observed in 2024.
About the Outer Harbour
The Outer Harbour is a well-mixed system open to coastal exchange.
It receives urban stormwater from Darwin’s northern suburbs and effluent from the Ludmilla Wastewater Treatment Plant is discharged to this part of the Harbour at the East Point outfall.
Seagrass beds occur off Casuarina Coastal Reserve where dugongs can be spotted regularly.
Long term trend
Data summary
The distribution of the data for all parameters is shown here as box and whisker plots.
For report card grades the median of the data (solid line in the box) is compared to the Water Quality Objective (dotted line) for each parameter.
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Supplementary parameters
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