Water Turbidity

AUS-TMI-CON-WTU General Moderate confidence

Benchmark Value

No specific value — see range
Range: 0 to 3 NTU
Optimal Range: 0 to 3
Direction: Lower is desirable ↓
Form: OptimalRange

Scoring Curve

This curve shows how a field measurement for this indicator would score across all available benchmark forms in this context.

Evidence & Context

The report states that typical turbidity levels for offshore GBR reefs average 0–3 NTU.

Metric Definition:

Water turbidity is a fundamental optical property of water that quantifies the reduction in clarity resulting from the presence of suspended particulate matter.

Benchmark Definition:

Typical turbidity levels for offshore GBR reefs.

Justification:

Represents the clearest, most stable oceanic condition, analogous to a near-pristine baseline.

Sources (1)

Preview of Identifying water quality and ecosystem health threats ... - NESP TWQ
Identifying water quality and ecosystem health threats ... - NESP TWQ
View Source

Supporting Sources (28)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Marine Monitoring Program: Annual Report Inshore Water Quality Monitoring 2023-24, accessed August 3, 2025,
(PDF) Marine Monitoring Program: Annual Report Inshore Water Quality Monitoring 2023-24, accessed August 3, 2025,
Contextual Support Direct Evidence Methodology Source Government

Developing a reef water quality management plan — case study, accessed August 3, 2025

View Source
Preview of Biodiversity surveys of the Elizabeth and Middleton reefs 2013 and 2018 | eAtlas, accessed August 3, 2025,
Biodiversity surveys of the Elizabeth and Middleton reefs 2013 and 2018 | eAtlas, accessed August 3, 2025,
Contextual Support GreyLiterature

Lord Howe Island On-Site Wastewater Management Strategy, accessed August 3, 2025

View Source
Preview of Declining water quality - Great Barrier Reef Marine Park Authority, accessed August 1, 2025
Declining water quality - Great Barrier Reef Marine Park Authority, accessed August 1, 2025
Contextual Support Government

Monitoring wetland water quality related to livestock grazing in amphibian habitats - PMC, accessed July 25, 2025,

View Source
Preview of Developing a reef water quality management plan — case study, accessed August 3, 2025,
Developing a reef water quality management plan — case study, accessed August 3, 2025,
Contextual Support Direct Evidence Government

Altered water flows and quality | Wet Tropics Management Authority, accessed July 27, 2025

View Source
Preview of Development of basin-specific ecologically relevant water quality targets for the Great Barrier Reef, accessed August 3, 2025,
Development of basin-specific ecologically relevant water quality targets for the Great Barrier Reef, accessed August 3, 2025,
Contextual Support Journal

Queensland Reef Water Quality Program | Environment, land and water, accessed August 3, 2025

View Source
Preview of Dredging and Spoil Disposal Water Quality Monitoring Report - Woodside Energy, accessed August 3, 2025,
Dredging and Spoil Disposal Water Quality Monitoring Report - Woodside Energy, accessed August 3, 2025,
Contextual Support Journal

Great Barrier Reef Marine Park - Water Quality Australia, accessed August 3, 2025

View Source
Preview of Great Barrier Reef Marine Monitoring Program for Inshore Water Quality - Chlorophyll Fluorescence and Turbidity Time-series Data, accessed August 3, 2025,
Great Barrier Reef Marine Monitoring Program for Inshore Water Quality - Chlorophyll Fluorescence and Turbidity Time-series Data, accessed August 3, 2025,
Contextual Support Direct Evidence Methodology Source Government

Great Barrier Reef Marine Monitoring Program for Inshore Water Quality - Chlorophyll Fluorescence and Turbidity Time-series Data, accessed August 3, 2025,

View Source
Preview of Great Barrier Reef Marine Park - Water Quality Australia, accessed August 3, 2025,
Great Barrier Reef Marine Park - Water Quality Australia, accessed August 3, 2025,
Contextual Support Government

Water Quality Guidelines for the Great Barrier Reef Marine Park., accessed August 2, 2025

View Source
Preview of Identifying water quality and ecosystem health threats ... - NESP TWQ, accessed August 3, 2025,
Identifying water quality and ecosystem health threats ... - NESP TWQ, accessed August 3, 2025,
Direct Evidence Journal

report - Fitzroy Partnership for River Health, accessed August 3, 2025

View Source
Preview of Lord Howe Island Marine Park - Wikipedia, accessed August 3, 2025,
Lord Howe Island Marine Park - Wikipedia, accessed August 3, 2025,
Contextual Support GreyLiterature

Lord Howe Island Marine Park - Wikipedia, accessed August 1, 2025

View Source
Preview of Lord Howe Island Marine Park News Water Quality Research Collaboration, accessed August 3, 2025,
Lord Howe Island Marine Park News Water Quality Research Collaboration, accessed August 3, 2025,
Contextual Support Journal

Diving deeper into nutrient pathways to help protect Lord Howe Island's marine haven, accessed August 4, 2025

View Source
Preview of Lord Howe Island On-Site Wastewater Management Strategy, accessed August 3, 2025,
Lord Howe Island On-Site Wastewater Management Strategy, accessed August 3, 2025,
Contextual Support Journal

Lord Howe Island Marine Park News Water Quality Research Collaboration, accessed August 2, 2025

View Source
Preview of Marine Monitoring Program - Inshore water quality monitoring (AIMS ..., accessed August 3, 2025,
Marine Monitoring Program - Inshore water quality monitoring (AIMS ..., accessed August 3, 2025,
Contextual Support Methodology Source Government

Great Barrier Reef Marine Monitoring Program for Inshore Water Quality - Chlorophyll Fluorescence and Turbidity Time-series Data, accessed August 3, 2025

View Source
Preview of Marine Monitoring Program | Reef Authority, accessed August 3, 2025,
Marine Monitoring Program | Reef Authority, accessed August 3, 2025,
Contextual Support Methodology Source Government

(PDF) Marine Monitoring Program: Annual Report Inshore Water Quality Monitoring 2023-24, accessed August 3, 2025

View Source
Preview of MMP WQ report 2022-2023 - ResearchGate, accessed August 3, 2025,
MMP WQ report 2022-2023 - ResearchGate, accessed August 3, 2025,
Contextual Support

Identifying water quality and ecosystem health threats ... - NESP TWQ, accessed August 3, 2025

View Source
Preview of Monitoring water quality | AIMS - The Australian Institute of Marine Science, accessed August 3, 2025,
Monitoring water quality | AIMS - The Australian Institute of Marine Science, accessed August 3, 2025,
Contextual Support Methodology Source GreyLiterature

Declining water quality - Great Barrier Reef Marine Park Authority, accessed August 3, 2025

View Source
Preview of Queensland Reef Water Quality Program | Environment, land and water, accessed August 3, 2025,
Queensland Reef Water Quality Program | Environment, land and water, accessed August 3, 2025,
Contextual Support Regulatory Framework Government

Queensland Reef Water Quality Program | Environment, land and water, accessed August 2, 2025,

View Source
Preview of Reef 2050 Water Quality Improvement Plan 2017-2022, accessed August 3, 2025,
Reef 2050 Water Quality Improvement Plan 2017-2022, accessed August 3, 2025,
Contextual Support Regulatory Framework Journal

Reef 2050 Water Quality Improvement Plan 2017-2022, accessed August 3, 2025,

View Source
Preview of Reef Water Quality Report Card 2021 and 2022 Great Barrier Reef Marine Monitoring Program Methods, accessed August 3, 2025,
Reef Water Quality Report Card 2021 and 2022 Great Barrier Reef Marine Monitoring Program Methods, accessed August 3, 2025,
Contextual Support Methodology Source Journal

Gruber, R., et al. (2024). Marine Monitoring Program: Annual Report for Inshore Water Quality Monitoring 2022-23. Great Barrier Reef Marine Park Authority.

View Source
Preview of Relative risks to the Great Barrier Reef from degraded water quality, accessed August 3, 2025,
Relative risks to the Great Barrier Reef from degraded water quality, accessed August 3, 2025,
Contextual Support Journal

Frequently asked questions: Reef 2050 Water Quality Improvement Plan and 2017 Scientific Consensus Statement, accessed August 1, 2025,

View Source
Preview of report - Fitzroy Partnership for River Health, accessed August 3, 2025,
report - Fitzroy Partnership for River Health, accessed August 3, 2025,
Contextual Support Journal

report - Fitzroy Partnership for River Health, accessed August 3, 2025,

View Source
Preview of STATE OF ENVIRONMENT REPORT CARD 2021 - Torres Strait Regional Authority, accessed August 3, 2025,
STATE OF ENVIRONMENT REPORT CARD 2021 - Torres Strait Regional Authority, accessed August 3, 2025,
Contextual Support Journal

TSRA Groundwater Monitoring: Final Report 2022, accessed August 3, 2025

View Source
Preview of TSRA Groundwater Monitoring: Final Report 2022, accessed August 3, 2025,
TSRA Groundwater Monitoring: Final Report 2022, accessed August 3, 2025,
Contextual Support Methodology Source GreyLiterature

Identifying water quality and ecosystem health threats to the Torres Strait from runoff arising from mine-derived pollution of the Fly River - NESP TWQ, accessed August 3, 2025

View Source
Preview of Turbidity, accessed August 3, 2025,
Turbidity, accessed August 3, 2025,
Contextual Support Journal

Dissolved Oxygen (DO) Turbidity - Interstate Commission on the Potomac River Basin, accessed July 12, 2025

View Source
Preview of Water Quality & Investigations - Environment, land and water, accessed August 3, 2025,
Water Quality & Investigations - Environment, land and water, accessed August 3, 2025,
Contextual Support Government

Reef Water Quality Report Card 2021 and 2022 Great Barrier Reef Marine Monitoring Program Methods, accessed August 3, 2025

View Source
Preview of Water quality | AIMS, accessed August 3, 2025,
Water quality | AIMS, accessed August 3, 2025,
Contextual Support Methodology Source Government

Water quality | AIMS, accessed August 3, 2025

View Source
Preview of Water quality guidelines - Queensland Environment Department, accessed August 1, 2025,
Water quality guidelines - Queensland Environment Department, accessed August 1, 2025,
Contextual Support Regulatory Framework Government

Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000)

View Source
Preview of Water Quality Guidelines for the Great Barrier Reef Marine Park., accessed August 3, 2025,
Water Quality Guidelines for the Great Barrier Reef Marine Park., accessed August 3, 2025,
Contextual Support Regulatory Framework Journal

Determining Tipping Points and Responses of Macroinvertebrate Traits to Abiotic Factors in Support of River Management - PubMed Central

View Source

Context

  • Region Australia
  • Biome Tropical & Subtropical Maritime Islands
  • Land Use Conservation / Protected Natural Areas
  • Assessment Pristine Reference
  • Evidence Type ReferenceCondition

Lifecycle

  • Status Active
  • Version 1
  • Effective From 28 May 2026

Related Benchmarks

Other benchmarks in the AUS-TMI-CON-WTU family.

3 NTU Moderate
Conservation / Protected Natural Areas · Pristine Reference
Point Active v1
5 NTU Low
Conservation / Protected Natural Areas · Pristine Reference · winter dry season
MaximumOnly Active v1