Zone 2: East Arm

Water quality in the East Arm zone was categorised as very good in 2023.

darwin harbour 2022 zone 2 east arm b 01.jpg

About East Arm

East Arm is the centre of marine services and development in Darwin Harbour, with large gas industry development and the NT’s main port on its shores.

East Arm receives urban stormwater runoff from the city of Darwin and there is a small discharge of treated wastewater from the Berrimah plant into Bleeser’s Tidal Creek.

Large areas of mangroves have been cleared for industrial development alongside East Arm. However, intact mangrove habitats still remain along approximately half the coastline of East Arm.

Part of the foreshore is bounded by Charles Darwin National Park.

Long term trend

zone 2 east arm long term trend 2022

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


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