Darwin Harbour report card 2018

Zone 7: Shoal Bay

2018 report card overview

Water quality in Shoal Bay was excellent.

All indicators complied with Water Quality Objectives.

Zone 7 Shoal Bay grade wheel

About Shoal Bay

Shoal Bay is a shallow embayment with a number of sandbars along the coastal fringe and entrance to tidal creeks.

Shoal Bay receives sediment and nutrient loads from the Howard River catchment during the wet season.

A number of smaller mangrove-lined tidal creeks flow to Shoal Bay, these include King, Micket and Buffalo Creeks.

The Leanyer-Sanderson Wastewater Treatment Plant discharges to Buffalo Creek which flows into Shoal Bay.

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Long-term trend

Zone 7 Shoal Bay 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 7 Shoal Bay turbidity
Dissolved oxygen indicator – Oxygen saturation parameterZone 7 Shoal Bay dissolved oxygen
Algae indicator – Chlorophyll-a concentration parameterZone 7 Shoal Bay chlorophyll-a
Nutrients indicator – Nitro oxide, ammonia and soluble phosphorus concentrations parameterZone 7 Shoal Bay phosphorusZone 7 Shoal Bay ammoniaZone 7 Shoal Bay nitrogen oxide

Supplementary parameters

Zone 7 Shoal Bay salinity

Zone 7 Shoal Bay temperature

Zone 7 Shoal Bay pH levels

Last updated: 20 August 2020

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