Water Turbidity
AUS-TSW-AQU-WTU
General
Moderate confidence
Benchmark Value
50
NTU
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.
Evidence & Context
the upper bound of the ANZECC trigger value range for lowland rivers, 50 NTU, serves as a robust upper detrimental threshold.
Metric Definition:
Water Turbidity measured in Nephelometric Turbidity Units (NTU).
Benchmark Definition:
Upper detrimental threshold indicating management failure and degraded state.
Justification:
Based on the ANZECC guideline for lowland rivers and represents a point of management failure (e.g., algal blooms, high waste load).
Sources (1)
National Guidelines for Water Quality | Department of Natural ..., accessed July 12, 2025,
Journal
National Guidelines for Water Quality | Department of Natural ..., accessed July 12, 2025,
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