Water Turbidity

AUS-TSW-LVG-WTU General High confidence

Benchmark Value

14 NTU

Thresholds: Lower: —, Upper: 14

Direction: Lower is desirable ↓

Form: MaximumOnly

Scoring Curve

This curve shows how a field measurement for this indicator would score across all available benchmark forms in this context. The scoring engine uses 2 benchmarks together — the OptimalRange form drives the primary score, while 1 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary MaximumOnly Guard

Evidence & Context

Based on a critical review of available evidence, the most scientifically defensible benchmark for water turbidity representing the best available condition in a sustainably grazed temperate semi-arid landscape is <14 NTU.

Metric Definition:

Water turbidity measured as Nephelometric Turbidity Units (NTU) representing water clarity in streams and water bodies.

Benchmark Definition:

Water turbidity benchmark indicating the best available condition under sustainable grazing management in temperate semi-arid landscapes.

Justification:

It is a real-world field measurement from a commercial grazing landscape, directly and statistically correlated with a quantifiable state of high ecological health, representing the direct outcome of successful, best-practice riparian management.

Sources (1)

Preview of The influence of riparian vegetation on water quality in a mixed land use river basin - UQ eSpace, accessed July 18, 2025,

The influence of riparian vegetation on water quality in a mixed land use river basin - UQ eSpace, accessed July 18, 2025, Journal

Queensland Aquaculture Strategy 2024–2034, accessed July 21, 2025

Supporting Sources (21)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Water quality in two Australian dryland rivers: spatial and temporal variability and the role of flow - ResearchGate, accessed July 30, 2025,

(PDF) Water quality in two Australian dryland rivers: spatial and temporal variability and the role of flow - ResearchGate, accessed July 30, 2025,

Contextual Support

(PDF) Effects of increasing salinity on freshwater ecosystems in Australia - ResearchGate

Preview of A semi-arid lowland river: the River Murray, Australia. - ResearchGate, accessed July 10, 2025,

A semi-arid lowland river: the River Murray, Australia. - ResearchGate, accessed July 10, 2025,

Contextual Support GreyLiterature

A semi-arid lowland river: the River Murray, Australia. - ResearchGate, accessed July 10, 2025,

Preview of Alice Mulga SuperSite | Soil & Vegetation Monitoring - TERN Australia, accessed July 22, 2025,

Alice Mulga SuperSite | Soil & Vegetation Monitoring - TERN Australia, accessed July 22, 2025,

Contextual Support Government

Great Western Woodlands, Ground Water Data, 2014 - TERN Data Discovery Portal, accessed July 10, 2025,

Preview of Annual Water Quality Monitoring Report - WaterNSW, accessed July 10, 2025,

Annual Water Quality Monitoring Report - WaterNSW, accessed July 10, 2025,

Contextual Support Journal

Annual Water Quality Monitoring Report - WaterNSW, accessed July 10, 2025,

Preview of Critical limits for water risk management | Queensland Health, accessed July 21, 2025,

Critical limits for water risk management | Queensland Health, accessed July 21, 2025,

Regulatory Framework Government

Turbidity Measurement: A Simple, Effective Indicator of Water Quality Change, accessed July 10, 2025,

Preview of Do regenerative grazing management practices ... - CSIRO Publishing, accessed May 12, 2025

Do regenerative grazing management practices ... - CSIRO Publishing, accessed May 12, 2025

Contextual Support Journal

Do regenerative grazing management practices improve vegetation and soil health in grazed rangelands? Preliminary insights from a space-for-time study in the Great Barrier Reef catchments, Australia - CSIRO Publishing, accessed May 11, 2025,

Preview of Ecosystem Processes – Environmental Data Collection Methods - TERN Australia

Ecosystem Processes – Environmental Data Collection Methods - TERN Australia

Methodology Source Government

TERN Surveillance monitoring program: Soil vis-NIR spectral library with accompanying soil measurement data for 367 specimens - CSIRO Data Access Portal, accessed July 17, 2025,

Preview of Guidance document for assessing and managing water quality in temporary waters, accessed July 16, 2025,

Guidance document for assessing and managing water quality in temporary waters, accessed July 16, 2025,

Contextual Support Journal

Guidance document for assessing and managing water quality in temporary waters, accessed July 10, 2025,

Preview of Guidelines for grazing in the Gwydir Wetlands and Macquarie Marshes - Managing stock water - NSW Department of Primary Industries, accessed July 10, 2025,

Guidelines for grazing in the Gwydir Wetlands and Macquarie Marshes - Managing stock water - NSW Department of Primary Industries, accessed July 10, 2025,

Contextual Support Journal

Regenerative agriculture in Australia: the changing face ... - Frontiers, accessed July 10, 2025,

Preview of Landscape rehydration and regenerative agriculture improves soil health, accessed July 30, 2025,

Landscape rehydration and regenerative agriculture improves soil health, accessed July 30, 2025,

Contextual Support GreyLiterature

Soil Health and Regenerative Agriculture - Southern Queensland Landscapes, accessed July 27, 2025,

Preview of Long-term monitoring and modelling of pasture regeneration and water quality from a Bothriochloa pertusa site in the Great Barrier Reef catchments - CSIRO PUBLISHING | The Rangeland Journal, accessed July 10, 2025,

Long-term monitoring and modelling of pasture regeneration and water quality from a Bothriochloa pertusa site in the Great Barrier Reef catchments - CSIRO PUBLISHING | The Rangeland Journal, accessed July 10, 2025,

Contextual Support Journal

Impacts of land management practices on riparian land - DBCA Library

Preview of Long-term monitoring and modelling of pasture regeneration and water quality from a Bothriochloa pertusa site in the Great Barrier Reef catchments - CSIRO PUBLISHING | The Rangeland Journal, accessed July 15, 2025,

Long-term monitoring and modelling of pasture regeneration and water quality from a Bothriochloa pertusa site in the Great Barrier Reef catchments - CSIRO PUBLISHING | The Rangeland Journal, accessed July 15, 2025,

Contextual Support Journal

Reducing the impacts of grazing on water quality - EPA Victoria, accessed July 10, 2025,

Preview of Managing Grazing to Restore Soil Health, Ecosystem Function, and Ecosystem Services - Frontiers, accessed July 30, 2025,

Managing Grazing to Restore Soil Health, Ecosystem Function, and Ecosystem Services - Frontiers, accessed July 30, 2025,

Contextual Support Journal

Do regenerative grazing management practices improve vegetation and soil health in grazed rangelands? Preliminary insights from a space-for-time study in the Great Barrier Reef catchments, Australia - CSIRO Publishing, accessed July 10, 2025,

Preview of Reducing the impacts of grazing on water quality - EPA Victoria, accessed August 8, 2025

Reducing the impacts of grazing on water quality - EPA Victoria, accessed August 8, 2025

Contextual Support Journal

Generic document, accessed July 19, 2025,

Preview of Regen Ag #9- Nurture the Water Cycle - Dirty Clean Food

Regen Ag #9- Nurture the Water Cycle - Dirty Clean Food

Regulatory Framework GreyLiterature

Water Quality Guidelines Level of protection, accessed July 10, 2025,

Preview of Regenerative agriculture in Australia: the changing face of farming - Frontiers, accessed August 4, 2025

Regenerative agriculture in Australia: the changing face of farming - Frontiers, accessed August 4, 2025

Contextual Support Journal

NCC: Regenerative Agriculture and Soil Health - Wet Tropics Plan, accessed July 27, 2025,

Preview of The influence of riparian vegetation on water quality in ... - UQ eSpace, accessed July 10, 2025,

The influence of riparian vegetation on water quality in ... - UQ eSpace, accessed July 10, 2025,

Contextual Support Journal

The Importance of Riparian Vegetation To The Health & Stability of Aquatic Systems. - Tweed Shire Council, accessed July 10, 2025,

Preview of Understanding the relationship between livestock grazing and wetland condition - Arthur Rylah Institute for Environmental Research, accessed July 10, 2025,

Understanding the relationship between livestock grazing and wetland condition - Arthur Rylah Institute for Environmental Research, accessed July 10, 2025,

Contextual Support Journal

Understanding the relationship between livestock grazing and wetland condition - Arthur Rylah Institute for Environmental Research, accessed July 10, 2025,

Preview of Water quality for livestock, accessed July 29, 2025,

Water quality for livestock, accessed July 29, 2025,

Contextual Support Journal

Top 10 Strategies for Efficient Water Management on Your Farm - SONIC Natural Farming, accessed July 19, 2025,

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

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

Regulatory Framework Government

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

wetland management profile - arid and semi-arid lakes - WetlandInfo, accessed July 16, 2025,

Contextual Support Journal

wetland management profile - arid and semi-arid lakes - WetlandInfo, accessed July 10, 2025,

Context

Region Australia
Biome Temperate Semi-Arid Shrublands & Open Woodlands
Land Use Livestock Grazing & Pasture
Assessment Conservation Target
Evidence Type TargetCondition

Lifecycle

Status Active
Version 1
Effective From 24 Mar 2026

Notes

This benchmark is applicable to baseflow/low-flow conditions, not high-flow events. There is no evidence for a lower critical threshold; lower turbidity is ecologically preferable. The upper detrimental threshold is not a fixed value but a chronic, management-induced elevation above the natural baseline for a given flow state, which severely impairs aquatic ecosystem functions.