Water Electrical Conductivity (EC)

AUS-TMI-IND-WEC General Moderate confidence

Benchmark Value

480 µS/cm

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 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

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Evidence & Context

The proposed benchmark is the median surface water electrical conductivity observed across reference streams on Norfolk Island.

Metric Definition:

Surface water electrical conductivity (EC) measured as the ability of water to conduct an electrical current, indicative of dissolved inorganic ion concentration.

Benchmark Definition:

Median surface water electrical conductivity representing a high level of ecological health in the Tropical & Subtropical Maritime Islands biome under industrial land use.

Justification:

Derived from a recent, scientifically rigorous, multi-year field study by CSIRO on Norfolk Island, a relevant subtropical maritime island proxy, aligned with national guidelines.

Sources (1)

Preview of Norfolk Island water quality assessment. A report from the CSIRO Norfolk Island Water Resource Assessment to the Australian Government.

Norfolk Island water quality assessment. A report from the CSIRO Norfolk Island Water Resource Assessment to the Australian Government.

View Source

Supporting Sources (4)

Additional references from the underlying research that informed this benchmark.

(PDF) Effects of increasing salinity on freshwater ecosystems in Australia - ResearchGate, accessed August 11, 2025,

Direct Evidence GreyLiterature

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

View Source

Norfolk Island Water Quality Assessment - Squarespace, accessed August 4, 2025,

Direct Evidence Journal

Norfolk Island Water Quality Assessment - Squarespace

View Source

Salinity - Murray�darling Basin Authority

Contextual Support Journal

Salinity - Murray–Darling Basin Authority

View Source

Water quality indicator: Electrical conductivity - Queen Mary University of London, accessed August 11, 2025,

Direct Evidence Journal

www.qmul.ac.uk

View Source

Context

Region Australia
Biome Tropical & Subtropical Maritime Islands
Land Use Industrial & Infrastructure Use
Assessment Not Stated
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 5 Jun 2026

Notes

This value represents the central tendency of ambient water quality in a real-world, developed island ecosystem with good water quality. It is validated by national guidelines and is considered a scientifically defensible benchmark in the absence of direct industrial site data. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

Other benchmarks in the AUS-TMI-IND-WEC family.