Territory Stories

Darwin Harbour in good health

Details:

Title

Darwin Harbour in good health

Member

Westra Van Holthe, Willem

Political affiliation

Country Liberals

Collection

Media Releases for 12th Assembly 2012 - 2016; Media Releases; ParliamentNT

Date

2015-03-04

Location

Darwin

Notes

Made available by via the Publications (Legal Deposit) Act 2004 (NT)

Language

English

Subject

Oceans; Marine life

Publisher name

Northern Territory Government

File type

application/pdf

Use

Issued as a Media Release

Copyright owner

Northern Territory Government

Parent handle

https://hdl.handle.net/10070/254788

Citation address

https://hdl.handle.net/10070/528215

Related items

https://hdl.handle.net/10070/528211; https://hdl.handle.net/10070/528213

Page content

9 Table 5 Darwin Harbour Water Quality Objectives Water quality grades A - Excellent water quality. All four water quality indicators meet desired levels. B - Very good water quality. Three water quality indicators meet desired levels. C - Good water quality. Two water quality indicators meet desired levels. D - Poor water quality. Only one water quality indicator meets desired levels. E - Very poor water quality. No water quality indicators meet desired levels. Indicators Water Quality Objectives Upper area Middle area Outer area Dissolved Oxygen Dissolved oygen (% saturation) 80-100 80100 80100 Water Clarity Suspended solids (mg/L) <10 <10 <10 Algae Chlorophyll a (g/L) <4 <2 <1 Nutrients NO-N (g/L) <20 <20 <10 Ammonia as N (g/L) <20 <20 <20 Total nitrogen (g/L) <300 <270 <440 Total phosphorus (g/L) <30 <20 <20 Filterable reactive phosphorus (g/L) <10 <5 <10 pH pH 6.5-8.5 7.0-8.5 7.0-8.5 4.3 Water quality grades The water quality grades, from A to E, have been assigned for each area depending on compliance with local WQOs (see Table 5).


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