Darwin Harbour report card 2019

Zone 5: Middle Harbour

The 2019 report card overview

Water quality in the Middle Harbour was excellent.

Zone 5 Middle Harbour grade wheel

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.

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.

Zone 5 Middle Harbour turbidity
Zone 5 Middle Harbour dissolved oxygen
Zone 5 Middle Harbour chlorophyll-a
Zone 5 Middle Harbour phosphorusZone 5 Middle Harbour ammoniaZone 5 Middle Harbour nitrogen oxide

Supplementary parameters

Zone 5 Middle Harbour salinity Zone 5 Middle Harbour temperature Zone 5 Middle Harbour pH levels

Last updated: 07 April 2020

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