Zone 5: Middle Harbour

Water quality in the Middle Harbour was very good.

About Middle Harbour

The Middle Harbour zone receives urban and industrial stormwater runoff from the city of Darwin and development at Wickham Point.

The harbour’s main shipping channel transverses this zone and it receives dispersed discharge from the Ludmilla wastewater treatment plant at the East Point outfall.

Seagrass beds occur in Fannie Bay, where dugongs can often be seen. A shallow coral reef that is exposed at extreme low tides extends around East Point.

Long term trend

Zone 1 - Elizabeth River estuary 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.

Indicator Plot(s)
Algae (Chlorophyll-a)
Dissolved oxygen
Nutrients (nitrogen and phosphorus)
Water clarity (turbidity)

Supplementary parameters


Last updated: 14 September 2022

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