Water Electrical Conductivity (EC)

AUS-TGP-CON-WEC General Moderate confidence

Benchmark Value

250 µS/cm

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. The scoring engine uses 9 benchmarks together — the OptimalRange form drives the primary score, while 8 guard(s) constrain the result.

Contributing Benchmarks

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

Evidence & Context

The optimal range for maintaining high ecological integrity in conservation areas is considered to be < 250 µS/cm.

Metric Definition:

Upper boundary of the optimal management range for electrical conductivity in conservation areas

Benchmark Definition:

Conservative upper limit for electrical conductivity to maintain high ecological condition in conservation areas.

Justification:

Set well below the first biological impact threshold to provide a protective buffer for sensitive species.

Sources (1)

Preview of Diatom–water quality thresholds in South Australian streams indicate a need for more stringent water quality guidelines | Request PDF - ResearchGate, accessed May 11, 2025,

Diatom–water quality thresholds in South Australian streams indicate a need for more stringent water quality guidelines | Request PDF - ResearchGate, accessed May 11, 2025, GreyLiterature

Validating species sensitivity distributions using salinity tolerance of riverine macroinvertebrates in the southern Murray–Darling Basin (Victoria, Australia) - Canadian Science Publishing

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Supporting Sources (4)

Additional references from the underlying research that informed this benchmark.

Preview of Impact of secondary salinisation on freshwater ecosystems: effects of contrasting, experimental, short-term releases of saline wastewater on macroinvertebrates in a lowland stream - CSIRO Publishing, accessed August 8, 2025,

Impact of secondary salinisation on freshwater ecosystems: effects of contrasting, experimental, short-term releases of saline wastewater on macroinvertebrates in a lowland stream - CSIRO Publishing, accessed August 8, 2025,

Direct Evidence Government

Comparison of two commonly used methods for identifying water quality thresholds in freshwater ecosystems using field and synthetic data - PubMed

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Low water conductivity increases the effects of copper on the serum parameters in fish (Oreochromis niloticus) - PubMed

Contextual Support Journal

Low water conductivity increases the effects of copper on the serum parameters in fish (Oreochromis niloticus) - PubMed

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Preview of The Effects of Road De-icing Salts on Water Quality and Macroinvertebrates in Australian Alpine Areas - University of Canberra Research Portal

The Effects of Road De-icing Salts on Water Quality and Macroinvertebrates in Australian Alpine Areas - University of Canberra Research Portal

Direct Evidence Journal

The Effects of Road De-icing Salts on Water Quality and Macroinvertebrates in Australian Alpine Areas - University of Canberra Research Portal

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Preview of The Relationship between Electrical Conductivity and Selected Macroinvertebrate Communities in Four River Systems of South-West Victoria, Australia - ResearchGate

The Relationship between Electrical Conductivity and Selected Macroinvertebrate Communities in Four River Systems of South-West Victoria, Australia - ResearchGate

Direct Evidence GreyLiterature

The Relationship between Electrical Conductivity and Selected Macroinvertebrate Communities in Four River Systems of South-West Victoria, Australia - ResearchGate

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Context

Region Australia
Biome Temperate Grassy Woodlands & Plains
Land Use Conservation / Protected Natural Areas
Assessment Conservation Target
Evidence Type HealthyOperationalRange

Lifecycle

Status Active
Version 1
Effective From 10 Jun 2026

Notes

Represents a practical management target and trigger for intervention in conservation areas.

Related Benchmarks

Other benchmarks in the AUS-TGP-CON-WEC family.