Water Turbidity

AUS-TGP-AQU-WTU General Moderate confidence

Benchmark Value

20 NTU
Direction: Lower is desirable ↓
Form: Point

Scoring Curve

Scoring curve unavailable

The scoring engine could not generate a curve for this benchmark context. The primary form is Point, but the benchmark data may be missing required fields (e.g., optimal range bounds for an OptimalRange benchmark). This is typically a data quality issue in the benchmark pipeline.

Evidence & Context

The analysis concludes that the most appropriate benchmark for water turbidity is 20 NTU.

Metric Definition:

Water turbidity as measured in NTU representing the suspended particulate matter affecting water clarity in freshwater aquaculture systems.

Benchmark Definition:

A benchmark turbidity value representing best-practice environmental performance in freshwater aquaculture within the Temperate Grassy Woodlands & Plains biome.

Justification:

This value is based on the South Australian EPA's legally defined water quality criteria and aligns with the natural ambient turbidity range of 6–50 NTU for healthy lowland rivers in the Temperate Grassy Woodlands biome.

Sources (2)

Preview of Aquaculture Management and the Environment Protection (Water Quality) Policy
Aquaculture Management and the Environment Protection (Water Quality) Policy Journal

Aquaculture Management and the Environment Protection (Water Quality) Policy

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Preview of Water quality guidelines - Queensland Environment Department, accessed August 1, 2025,
Water quality guidelines - Queensland Environment Department, accessed August 1, 2025, Government

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

View Source

Supporting Sources (34)

Additional references from the underlying research that informed this benchmark.

Preview of A Review of Research and Development Needs for Murray Cod Aquaculture in Australia - NSW Department of Primary Industries, accessed August 10, 2025
A Review of Research and Development Needs for Murray Cod Aquaculture in Australia - NSW Department of Primary Industries, accessed August 10, 2025
Contextual Support Journal

A Review of Research and Development Needs for Murray Cod Aquaculture in Australia - NSW Department of Primary Industries, accessed August 10, 2025

View Source
Preview of Ambient water quality monitoring of the River Murray 1990-1999 Report No. 1 - EPA SA, accessed August 10, 2025
Ambient water quality monitoring of the River Murray 1990-1999 Report No. 1 - EPA SA, accessed August 10, 2025
Contextual Support Journal

Ambient water quality monitoring of the River Murray 1990-1999 Report No. 1 - EPA SA, accessed August 10, 2025

View Source
Preview of ANZECC & ARMCANZ (2000) guidelines - Water Quality Australia, accessed August 12, 2025
ANZECC & ARMCANZ (2000) guidelines - Water Quality Australia, accessed August 12, 2025
Contextual Support Government

ANZECC & ARMCANZ (2000) guidelines - Water Quality Australia

View Source
Preview of Australian and New Zealand guidelines for fresh and marine water quality, accessed July 19, 2025,
Australian and New Zealand guidelines for fresh and marine water quality, accessed July 19, 2025,
Contextual Support Government

Australian Alps Liaison Committee (AALC). (2011). Caring for our Australian Alps catchments: A climate change action strategy. Department of Climate Change and Energy Efficiency.

View Source
Preview of Best Practice Salmonid Aquaculture Industry - VFA, accessed August 10, 2025
Best Practice Salmonid Aquaculture Industry - VFA, accessed August 10, 2025
Contextual Support Government

Best Practice Salmonid Aquaculture Industry - VFA, accessed August 10, 2025

View Source
Preview of Challenges and adaptation needs for water quality in the Murray-Darling Basin in response to climate change - UNSW Sydney, accessed August 10, 2025
Challenges and adaptation needs for water quality in the Murray-Darling Basin in response to climate change - UNSW Sydney, accessed August 10, 2025
Contextual Support Journal

Challenges and adaptation needs for water quality in the ... - UNSW

View Source
Preview of Characterising the relationship between water quality and water quantity, accessed August 5, 2025
Characterising the relationship between water quality and water quantity, accessed August 5, 2025
Contextual Support Journal

Turbidity | Australia state of the environment 2021

View Source
Preview of Default guideline values - Water Quality Australia, accessed August 12, 2025
Default guideline values - Water Quality Australia, accessed August 12, 2025
Contextual Support Government

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

View Source
Preview of Development of a Health Management Strategy for the Silver Perch Aquaculture Industry., accessed July 20, 2025,
Development of a Health Management Strategy for the Silver Perch Aquaculture Industry., accessed July 20, 2025,
Contextual Support Government

The influence of saline concentration on the success of Calcein marking techniques for hatchery-produced Murray cod (Maccullochella peelii), accessed July 20, 2025,

View Source
Preview of Freshwater aquaculture | Business Queensland, accessed August 1, 2025
Freshwater aquaculture | Business Queensland, accessed August 1, 2025
Contextual Support Government

Nutrition and Feeding for Sustainable Aquaculture Development in the Third Millennium, accessed August 1, 2025

View Source
Preview of GRASSLANDS & GRASSY WOODLANDS - Corangamite Catchment Management Authority, accessed August 5, 2025,
GRASSLANDS & GRASSY WOODLANDS - Corangamite Catchment Management Authority, accessed August 5, 2025,
Contextual Support Journal

(PDF) Identifying ecological barriers to restoration in temperate ...

View Source
Preview of Guidelines for constructing and maintaining aquaculture containment structures - Department of Primary Industries, Queensland
Guidelines for constructing and maintaining aquaculture containment structures - Department of Primary Industries, Queensland
Contextual Support Journal

Guidelines for constructing and maintaining aquaculture containment structures - Department of Primary Industries, Queensland, accessed August 10, 2025

View Source
Preview of Improvement of the Water Quality in Rainbow Trout Farming by Means of the Feeding Type and Management over 10 Years (2009–2019), accessed August 10, 2025
Improvement of the Water Quality in Rainbow Trout Farming by Means of the Feeding Type and Management over 10 Years (2009–2019), accessed August 10, 2025
Contextual Support Journal

Improvement of the Water Quality in Rainbow Trout Farming by Means of the Feeding Type and Management over 10 Years (2009–2019) - PMC

View Source
Preview of Inland Aquaculture in Western Australia - DPIRD's Digital library, accessed August 10, 2025
Inland Aquaculture in Western Australia - DPIRD's Digital library, accessed August 10, 2025
Contextual Support

Inland Aquaculture in Western Australia - DPIRD's Digital library, accessed August 10, 2025

View Source
Preview of Jurisdictional information - Water Quality Australia, accessed August 10, 2025
Jurisdictional information - Water Quality Australia, accessed August 10, 2025
Regulatory Framework Government

Jurisdictional information - Water Quality Australia, accessed August 11, 2025

View Source
Preview of Mapping and describing your natural resources - MBFP-Pastoral, accessed August 10, 2025
Mapping and describing your natural resources - MBFP-Pastoral, accessed August 10, 2025
Contextual Support GreyLiterature

soils and landscapes of mulga lands with special reference to south western queensland, accessed August 28, 2025

View Source
Preview of Murray Cod | Department of Primary Industries, accessed July 20, 2025,
Murray Cod | Department of Primary Industries, accessed July 20, 2025,
Contextual Support Government

Australia - Brackish Water Aquaculture, accessed July 20, 2025,

View Source
Preview of Murray River catchment (NSW) Water Quality Objectives explained, accessed August 10, 2025
Murray River catchment (NSW) Water Quality Objectives explained, accessed August 10, 2025
Regulatory Framework Government

Murray River catchment (NSW) Water Quality Objectives explained, accessed August 10, 2025

View Source
Preview of National Guidelines for Water Quality - Department of Natural Resources and Environment Tasmania, accessed August 1, 2025,
National Guidelines for Water Quality - Department of Natural Resources and Environment Tasmania, accessed August 1, 2025,
Contextual Support

Using the ANZECC Guidelines and Water Quality Objectives in NSW

View Source
Preview of Redclaw crayfish aquaculture | Business Queensland, accessed August 10, 2025
Redclaw crayfish aquaculture | Business Queensland, accessed August 10, 2025
Contextual Support Government

Redclaw crayfish aquaculture | Business Queensland, accessed August 10, 2025

View Source
Preview of Restoring sustainability to Murray-Darling Basin freshwater fish and aquatic ecosystems - Australian Academy of Technological Sciences & Engineering, accessed August 10, 2025
Restoring sustainability to Murray-Darling Basin freshwater fish and aquatic ecosystems - Australian Academy of Technological Sciences & Engineering, accessed August 10, 2025
Contextual Support Journal

Restoring sustainability to Murray-Darling Basin freshwater fish and aquatic ecosystems - Australian Academy of Technological Sciences & Engineering, accessed August 10, 2025

View Source
Preview of Silver Perch - breeding - NSW Department of Primary Industries, accessed August 10, 2025
Silver Perch - breeding - NSW Department of Primary Industries, accessed August 10, 2025
Contextual Support Government

Silver Perch - breeding - NSW Department of Primary Industries, accessed August 10, 2025

View Source
Preview of Silver Perch | Department of Primary Industries
Silver Perch | Department of Primary Industries
Contextual Support Government

The Impact of Turbidity on Fish Health in Aquaculture Systems

View Source
Preview of Southeast Australia temperate savanna - Wikipedia, accessed August 4, 2025
Southeast Australia temperate savanna - Wikipedia, accessed August 4, 2025
Contextual Support GreyLiterature

Southeast Australia temperate savanna - Wikipedia

View Source
Preview of State Environment Protection Policy (Waters of Victoria) - Policy ..., accessed August 10, 2025
State Environment Protection Policy (Waters of Victoria) - Policy ..., accessed August 10, 2025
Contextual Support Journal

State Environment Protection Policy (Waters of Victoria) - Policy ..., accessed August 10, 2025

View Source
Preview of The effects of turbidity and complex habitats on the feeding of a galaxiid fish are clear and simple - CSIRO PUBLISHING | Marine and Freshwater Research, accessed August 10, 2025
The effects of turbidity and complex habitats on the feeding of a galaxiid fish are clear and simple - CSIRO PUBLISHING | Marine and Freshwater Research, accessed August 10, 2025
Contextual Support Journal

The effects of turbidity and complex habitats on the feeding of a galaxiid fish are clear and simple - CSIRO PUBLISHING | Marine and Freshwater Research, accessed August 10, 2025

View Source
Preview of The effects of turbidity, prey density and environmental complexity on the feeding of juvenile Murray cod Maccullochella peelii | Request PDF - ResearchGate, accessed July 16, 2025,
The effects of turbidity, prey density and environmental complexity on the feeding of juvenile Murray cod Maccullochella peelii | Request PDF - ResearchGate, accessed July 16, 2025,
Direct Evidence

The effects of turbidity, prey density and environmental complexity on the feeding of juvenile Murray cod Maccullochella peelii | Request PDF - ResearchGate

View Source
Preview of The Impact of Turbidity on Fish Health in Aquaculture Systems, accessed August 10, 2025
The Impact of Turbidity on Fish Health in Aquaculture Systems, accessed August 10, 2025
Contextual Support GreyLiterature

The Impact of Turbidity on Fish Health in Aquaculture Systems, accessed August 10, 2025

View Source
Preview of Using the ANZECC Guidelines and Water Quality Objectives in NSW, accessed August 11, 2025,
Using the ANZECC Guidelines and Water Quality Objectives in NSW, accessed August 11, 2025,
Contextual Support Journal

Reference-site data - Water Quality Australia

View Source
Preview of Water quality | Murray–Darling Basin Authority, accessed August 5, 2025
Water quality | Murray–Darling Basin Authority, accessed August 5, 2025
Contextual Support

(PDF) Water quality in two Australian dryland rivers: spatial and ..., accessed July 20, 2025,

View Source
Preview of Water Quality Guidelines Water quality objectives - Water Quality Australia, accessed August 10, 2025
Water Quality Guidelines Water quality objectives - Water Quality Australia, accessed August 10, 2025
Contextual Support Government

Water Quality Guidelines Water quality objectives - Water Quality Australia, accessed August 10, 2025

View Source
Preview of Water Quality Objectives - Border Rivers - NSW Government, accessed August 12, 2025
Water Quality Objectives - Border Rivers - NSW Government, accessed August 12, 2025
Contextual Support Government

(PDF) Impact of mitigated forestry activities on turbidity: assessing ...

View Source
Preview of Water Quality Objectives - Border Rivers (NSW) - NSW Government, accessed August 10, 2025
Water Quality Objectives - Border Rivers (NSW) - NSW Government, accessed August 10, 2025
Regulatory Framework Government

Water Quality Objectives - Border Rivers (NSW) - NSW Government, accessed August 10, 2025

View Source
Preview of Water quality of surface water environments - NSW Government Water, accessed August 1, 2025,
Water quality of surface water environments - NSW Government Water, accessed August 1, 2025,
Contextual Support Government

National Guidelines for Water Quality | Department of Natural ...

View Source

Context

  • Region Australia
  • Biome Temperate Grassy Woodlands & Plains
  • Land Use Aquaculture
  • Assessment Conservation Target
  • Evidence Type TargetCondition

Lifecycle

  • Status Active
  • Version 1
  • Effective From 1 Jun 2026

Notes

Levels below 5 NTU may be detrimental due to increased predation risk and stress for native species adapted to turbid conditions. Levels above 50 NTU are detrimental, indicating poor management and ecological harm.