Water Turbidity

AUS-AKW-LVG-WTU General Moderate confidence

Benchmark Value

No specific value — see range
Range: 0 to 2 NTU
Optimal Range: 0 to 2
Direction: Lower is desirable ↓
Form: OptimalRange

Scoring Curve

Scoring curve unavailable

The scoring engine could not generate a curve for this benchmark context. The primary form is CompositeFramework, 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.

Contributing Benchmarks

CompositeFramework Primary OptimalRange Guard MaximumOnly Guard MaximumOnly Guard OptimalRange Guard Point Guard OptimalRange Guard MaximumOnly Guard MaximumOnly Guard MaximumOnly Guard MinimumOnly Guard OptimalRange Guard

Evidence & Context

The optimal range for turbidity is as close to the natural, undisturbed baseline as possible. This is effectively < 2 NTU, representing a system with virtually no anthropogenic sediment input.

Metric Definition:

Water turbidity measured in Nephelometric Turbidity Units (NTU) representing optimal ecological condition.

Benchmark Definition:

This benchmark defines the optimal turbidity range indicating minimal anthropogenic sediment input and high ecological health in arid karstic woodlands and shrublands under livestock grazing.

Justification:

Reflects the naturally high clarity of groundwater-dependent ecosystems in arid karst environments during baseflow conditions.

Sources (1)

Preview of AUS-AKW-LVG-WTU-20250725: Water Turbidity Benchmark Research for the Nature Index
AUS-AKW-LVG-WTU-20250725: Water Turbidity Benchmark Research for the Nature Index
View Source

Supporting Sources (26)

Additional references from the underlying research that informed this benchmark.

Preview of Australian groundwater-dependent ecosystems toolbox part 1: assessment framework - Bureau of Meteorology, accessed July 25, 2025,
Australian groundwater-dependent ecosystems toolbox part 1: assessment framework - Bureau of Meteorology, accessed July 25, 2025,
Contextual Support GreyLiterature

Australian groundwater-dependent ecosystems toolbox part 1: assessment framework - Bureau of Meteorology, accessed July 25, 2025,

View Source
Preview of Can Grazing Animals Impact Water Quality? - Utah State University Extension, accessed July 25, 2025,
Can Grazing Animals Impact Water Quality? - Utah State University Extension, accessed July 25, 2025,
Contextual Support Government

Grazing Management National Management Measures to Control Nonpoint Pollution from Agriculture - Environmental Protection Agency (EPA), accessed July 25, 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 Declining water quality - Reef Authority, accessed July 25, 2025,
Declining water quality - Reef Authority, accessed July 25, 2025,
Contextual Support Journal

Declining water quality - Reef Authority, accessed July 25, 2025,

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 Drinking Water Quality - Water Corporation, accessed July 25, 2025,
Drinking Water Quality - Water Corporation, accessed July 25, 2025,
Contextual Support GreyLiterature

Drinking Water Quality - Water Corporation, accessed July 25, 2025,

View Source
Preview of Feeling sedimental: celebrating our impact improving water quality on the Reef, accessed July 25, 2025,
Feeling sedimental: celebrating our impact improving water quality on the Reef, accessed July 25, 2025,
Contextual Support Journal

Feeling sedimental: celebrating our impact improving water quality on the Reef, accessed July 25, 2025,

View Source
Preview of Grazing strategies | .Meat & Livestock Australia - MLA, accessed July 25, 2025,
Grazing strategies | .Meat & Livestock Australia - MLA, accessed July 25, 2025,
Contextual Support Journal

Grazing strategies | .Meat & Livestock Australia - MLA, accessed July 25, 2025,

View Source
Preview of Grazing support programs | Environment, land and water - Queensland Government, accessed August 8, 2025
Grazing support programs | Environment, land and water - Queensland Government, accessed August 8, 2025
Contextual Support Government

Infiltration rates and soil moisture in a groved mulga community near ..., accessed July 18, 2025

View Source
Preview of Karst - Wikipedia, accessed July 26, 2025,
Karst - Wikipedia, accessed July 26, 2025,
Contextual Support GreyLiterature

Karst - Wikipedia, accessed July 25, 2025,

View Source
Preview of Karst | Geoscience Australia, accessed July 26, 2025,
Karst | Geoscience Australia, accessed July 26, 2025,
Contextual Support Government

Karst | Geoscience Australia, accessed July 25, 2025,

View Source
Preview of Karst Groundwater Systems: a brief overview - ACKMA 1973 - 2011, accessed July 27, 2025
Karst Groundwater Systems: a brief overview - ACKMA 1973 - 2011, accessed July 27, 2025
Contextual Support

What is a groundwater dependent ecosystem? - Arid Lands Environment Centre, accessed July 25, 2025,

View Source
Preview of karst systems of Western Australia - DBCA Library, accessed July 25, 2025,
karst systems of Western Australia - DBCA Library, accessed July 25, 2025,
Contextual Support Journal

karst systems of Western Australia - DBCA Library, accessed July 25, 2025,

View Source
Preview of Karst wetlands - WetlandInfo, accessed July 26, 2025,
Karst wetlands - WetlandInfo, accessed July 26, 2025,
Contextual Support Journal

Karst wetlands - WetlandInfo, accessed July 25, 2025,

View Source
Preview of Livestock grazing management and biodiversity conservation in Australian temperate grassy landscapes - ResearchGate, accessed August 5, 2025,
Livestock grazing management and biodiversity conservation in Australian temperate grassy landscapes - ResearchGate, accessed August 5, 2025,
Contextual Support Journal

Livestock grazing management and biodiversity conservation in Australian temperate grassy landscapes - ResearchGate

View Source
Preview of Monitoring wetland water quality related to livestock grazing in amphibian habitats, accessed July 25, 2025,
Monitoring wetland water quality related to livestock grazing in amphibian habitats, accessed July 25, 2025,
Contextual Support Journal

Monitoring wetland water quality related to livestock grazing in amphibian habitats, accessed July 25, 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 Regenerative agriculture across continents: same principles, different systems | .Meat & Livestock Australia - MLA, accessed July 25, 2025
Regenerative agriculture across continents: same principles, different systems | .Meat & Livestock Australia - MLA, accessed July 25, 2025
Contextual Support GreyLiterature

Grazing support programs | Environment, land and water - Queensland Government, accessed July 25, 2025,

View Source
Preview of Regenerative Grazing: 3 Different Approaches - Shorthandstories.com, accessed August 5, 2025,
Regenerative Grazing: 3 Different Approaches - Shorthandstories.com, accessed August 5, 2025,
Contextual Support GreyLiterature

Regenerative Grazing: 3 Different Approaches - Shorthandstories.com

View Source
Preview of SA Arid Lands Landscape Regional Summary 2022 Aquatic Ecosystem Condition Report, accessed July 25, 2025,
SA Arid Lands Landscape Regional Summary 2022 Aquatic Ecosystem Condition Report, accessed July 25, 2025,
Contextual Support Journal

SA Arid Lands Landscape Regional Summary 2022 Aquatic Ecosystem Condition Report, accessed July 25, 2025,

View Source
Preview of Sustainable land management practices for graziers - NSW Department of Primary Industries, accessed August 6, 2025,
Sustainable land management practices for graziers - NSW Department of Primary Industries, accessed August 6, 2025,
Contextual Support Journal

Sustainable land management practices for graziers - NSW Department of Primary Industries, accessed May 10, 2026

View Source
Preview of The Water Below: An introduction to karst hydrology and the hydrological setting of the Australian karsts | Request PDF - ResearchGate, accessed July 25, 2025,
The Water Below: An introduction to karst hydrology and the hydrological setting of the Australian karsts | Request PDF - ResearchGate, accessed July 25, 2025,
Contextual Support GreyLiterature

The Water Below: An introduction to karst hydrology and the hydrological setting of the Australian karsts | Request PDF - ResearchGate, accessed July 25, 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 Government, accessed July 25, 2025,
Water Quality Objectives - Border Rivers - NSW Government, accessed July 25, 2025,
Contextual Support

Water Quality Objectives - Border Rivers - NSW Government, accessed July 25, 2025,

View Source
Preview of Water Quality Standards for Surface Waters of the State of Washington Chapter 173-201A WAC, accessed July 25, 2025,
Water Quality Standards for Surface Waters of the State of Washington Chapter 173-201A WAC, accessed July 25, 2025,
Contextual Support Government

Water Quality Standards for Surface Waters of the State of Washington Chapter 173-201A WAC, accessed July 25, 2025,

View Source
Preview of WESTERN AUSTRALIAN WATER QUALITY GUIDELINES FOR FRESH AND MARINE WATERS - DBCA Library, accessed July 16, 2025,
WESTERN AUSTRALIAN WATER QUALITY GUIDELINES FOR FRESH AND MARINE WATERS - DBCA Library, accessed July 16, 2025,
Contextual Support Journal

WESTERN AUSTRALIAN WATER QUALITY ... - DBCA Library, accessed July 25, 2025,

View Source

Context

  • Region Australia
  • Biome Arid Karstic Woodlands & Shrublands
  • Land Use Livestock Grazing & Pasture
  • Assessment Not Stated
  • Evidence Type ReferenceCondition

Lifecycle

  • Status Active
  • Version 1
  • Effective From 4 Jun 2026

Notes

Lower turbidity is always better; no beneficial lower threshold exists. The optimal range is effectively less than 2 NTU. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

Other benchmarks in the AUS-AKW-LVG-WTU family.

5 NTU Moderate
Livestock Grazing & Pasture · Not Stated
MaximumOnly Active v1