Water Turbidity

AUS-AKW-AQU-WTU General Moderate confidence

Benchmark Value

15 NTU

Direction: Higher 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 20 benchmarks together — the OptimalRange form drives the primary score, while 19 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary LowerThreshold Guard UpperThreshold Guard Point Guard UpperThreshold Guard MaximumOnly Guard LowerThreshold Guard OptimalRange Guard OptimalRange Guard LowerThreshold Guard MaximumOnly Guard UpperThreshold Guard MaximumOnly Guard OptimalRange Guard MinimumOnly Guard Point Guard LowerThreshold Guard OptimalRange Guard UpperThreshold Guard MaximumOnly Guard

Evidence & Context

The analysis concludes that a turbidity level of < 5 NTU represents the best available condition for the source water and the operational state of a best-practice aquaculture system in this context.

Metric Definition:

Water turbidity level representing the clarity of influent source water in a sustainable groundwater-fed Recirculating Aquaculture System (RAS) in the Arid Karstic Woodlands & Shrublands biome.

Benchmark Definition:

Benchmark turbidity level for influent source water in sustainable groundwater-fed aquaculture systems.

Justification:

Derived through logical inference anchored to a best-practice, sustainably certified RAS using pristine ancient aquifer water, corroborated with national water quality guidelines.

Sources (1)

Derived Benchmark based on Functional Analogue (MainStream Aquaculture) and National Guidelines (ANZECC/ANZG) Government

Derived Benchmark based on Functional Analogue (MainStream Aquaculture) and National Guidelines (ANZECC/ANZG)

View Source

Supporting Sources (2)

Additional references from the underlying research that informed this benchmark.

National Guidelines for Water Quality - Department of Natural Resources and Environment Tasmania, accessed August 1, 2025,

Direct Evidence

Australian and New Zealand Guidelines for Fresh and Marine Water ...

View Source

The Impact of Turbidity on Fish Health in Aquaculture Systems

Contextual Support Journal

The Impact of Turbidity on Fish Health in Aquaculture Systems

View Source

Context

Region Australia
Biome Arid Karstic Woodlands & Shrublands
Land Use Aquaculture
Assessment Pristine Reference
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 19 Mar 2026

Notes

Represents the best available condition for influent source water and baseline operational state; no direct measurements exist for this specific context. ConsistencyResolver applied 2026-03-23 00:20 UTC: BenchmarkValue 5 → 15 (check: MinAboveMax, rationale: Swapping values with MinimumOnly benchmark 899 to correct form assignment: 15 NTU is the upper detrimental threshold and should be the MaximumOnly threshold. This aligns with the Notes stating <5 NTU is best condition and >15 NTU indicates malfunction.)

Related Benchmarks

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