Water Electrical Conductivity (EC)

AUS-TSW-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

A lower critical threshold exists at approximately 30 µS/cm, below which essential physiological processes like osmoregulation are compromised for sensitive aquatic fauna.

Metric Definition:

Lower critical threshold for water electrical conductivity below which aquatic fauna experience osmoregulatory stress.

Benchmark Definition:

Threshold below which water EC is too low to support healthy aquatic life.

Justification:

Based on macroinvertebrate tolerance data and physiological principles of osmoregulation.

Sources (1)

Gardens and Public Open Space Irrigation: A Case Study in Perth - Scientific Research Publishing

National Guidelines for Water Quality - Department of Natural Resources and Environment Tasmania

View Source

Supporting Sources (2)

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

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

Contextual Support Government

Salinity | Murray–Darling Basin Authority

View Source

Context

Region Australia
Biome Temperate Semi-Arid Shrublands & Open Woodlands
Land Use Production Forestry
Assessment Not Stated
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 9 Jun 2026

Notes

Water with EC consistently below 30 µS/cm is outside the natural range for healthy systems and likely causes stress to sensitive species. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

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