Water Electrical Conductivity (EC)

AUS-ASC-FOR-WEC General Moderate confidence

Benchmark Value

30 µS/cm

Direction: Lower is desirable ↓

Form: MinimumOnly

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 MaximumOnly Guard OptimalRange Guard OptimalRange Guard MaximumOnly Guard MinimumOnly Guard MaximumOnly Guard OptimalRange Guard

Evidence & Context

Therefore, for Australian alpine and subalpine aquatic ecosystems, any sustained elevation of EC above the natural background range (i.e., consistently >30 µS/cm) should be considered a trigger for investigation and a potential indicator of diminishing environmental health.

Metric Definition:

Water Electrical Conductivity (EC) as an indicator of salinity stress impacting aquatic macroinvertebrate communities.

Benchmark Definition:

This benchmark represents the threshold EC level above which ecological harm to sensitive alpine aquatic biota begins in Australian alpine and subalpine production forestry environments.

Justification:

Based on observed ecological impacts in the Australian Alps at EC levels above natural background, indicating harm to sensitive macroinvertebrate taxa.

Sources (1)

Salinity - Murray–Darling Basin Authority, accessed August 11, 2025, Government

Salinity | Murray–Darling Basin Authority

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Supporting Sources (7)

Additional references from the underlying research that informed this benchmark.

Australia's forests – overview - DAFF, accessed August 5, 2025,

Contextual Support Government

Eastern Australian Temperate Forests | One Earth, accessed April 29, 2025,

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Australia's State of the Forests Report 2018 - DAFF

Contextual Support Journal

ACTIVE MANAGEMENT AND RESEARCH FOR THE ...

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Australian Heritage Database - DCCEEW, accessed on May 25, 2025,

Contextual Support Journal

Australian Heritage Database - DCCEEW

View Source

Best Management Practices for Forest Bioenergy Programs | Request PDF - ResearchGate

Contextual Support

Best Management Practices for Forest Bioenergy Programs | Request PDF - ResearchGate

View Source

The Effects of Road De-icing Salts on Water Quality and ..., accessed August 17, 2025,

Direct Evidence Regulatory Framework Journal

The Effects of Road De-icing Salts on Water Quality and Macroinvertebrates in Australian Alpine Areas, accessed on May 29, 2025

View Source

The impact of forestry as a land use on water quality outcomes: An integrated analysis

Contextual Support GreyLiterature

The impact of forestry as a land use on water quality outcomes: An integrated analysis

View Source

www.environment.nsw.gov.au, accessed on May 25, 2025,

Direct Evidence

The Australian Alps Bioregion - Environment and Heritage, accessed on May 27, 2025,

View Source

Context

Region Australia
Biome Alpine and Subalpine Complex
Land Use Production Forestry
Assessment Not Stated
Evidence Type DegradationThreshold

Lifecycle

Status Rejected
Version 1
Effective From 3 Jun 2026
Effective To 3 Jun 2026

Notes

Sustained EC values above 30 µS/cm indicate potential ecological harm; levels around 60 µS/cm may indicate emerging harm; values in the hundreds µS/cm are clearly detrimental. AssessmentContext defaulted to 'Not Stated' because the source document did not state one. Rejected 2026-06-03: Form inversion (MinimumOnly+LowerGuard on HID=0 indicator). Correct form (MaximumOnly+UpperGuard) already occupied by ID 1523 (25 µS/cm). The 30 µS/cm harm trigger is retained in ID 1523 Notes.

Related Benchmarks

Other benchmarks in the AUS-ASC-FOR-WEC family.