Darwin Harbour report card 2019

Zone 3: Middle Arm

The 2019 report card overview

Water quality in Middle Arm was excellent.

Zone 3 Middle Arm grade wheel

About Middle Arm

Middle Arm comprises the Blackmore and Pioneer River estuaries. The zone has extensive mangrove fringes and intertidal mudflats.

The Blackmore River flows into Darwin Harbour over the whole year, with dry season flows from Darwin River Dam and Berry Springs.

Most of the zone's catchment is rural or savannah woodland.

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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 3 Middle Arm turbidity
Zone 3 Middle Arm dissolved oxygen
Zone 3 Middle Arm chlorophyll-a
Zone 3 Middle Arm phosphorusZone 3 Middle Arm ammonia  Zone 3 Middle Arm nitrogen oxide

Supplementary parameters

Zone 3 Middle Arm salinity Zone 3 Middle Arm temperature Zone 3 Middle Arm pH levels

Last updated: 20 August 2020

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