Darwin Harbour report card 2018

Zone 2: East Arm

Water quality in East Arm was excellent.

Zone 2 East Arm grade wheel

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.

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Long-term trend

Zone 2 East Arm trends

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.

Zone 2 East Arm turbidity
Dissolved oxygen indicator – Oxygen saturation parameterZone 2 East Arm dissolved oxygen
Algae indicator – Chlorophyll-a concentration parameterZone 2 East Arm chlorophyll-a
Nutrients indicator – Nitro oxide, ammonia and soluble phosphorus concentrations parameterZone 2 East Arm phosphorusZone 2 East Arm ammoniaZone 2 East Arm nitrogen oxide

Supplementary parameters

Zone 2 East Arm salinity

Zone 2 East Arm temperature

Zone 2 East Arm pH levels

Last updated: 07 June 2019

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