Darwin Harbour Report Card 2017

Darwin Harbour Water Quality Objectives

The Darwin Harbour Water Quality Objectives provide locally derived guideline values for water quality indicators in Darwin Harbour.

Indicators

Sub-indicators

Water Quality Guideline value

Upper Estuary

Mid Estuary

Outer Estuary

Dissolved Oxygen

Dissolved oxygen

(% saturation)

80-100

80-100

80-100

Water clarity

Turbidity (NTU)

<4

<4

<4

Algae

Chlorophyll-a (µg/L)

<4

<2

<1

Nutrients

NOx_N (µg/L)

<20

<20

<10

Ammonia as N (µg/L)

<20

<20

<20

Filterable Reactive Phosphorus (µg/L)

<10

<5

<10

Last updated: 10 May 2018