Water Electrical Conductivity (EC)

AUS-TSW-IND-WEC General High confidence

Benchmark Value

1600 µS/cm
Thresholds: Lower: —, Upper: 1600
Direction: Lower is desirable ↓
Form: MaximumOnly

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

Evidence & Context

A conservative and broadly applicable upper limit for maintaining aquatic ecosystem health is ~1600 µS/cm.

Metric Definition:

Upper detrimental threshold of Electrical Conductivity (EC) beyond which aquatic ecosystem health is compromised.

Benchmark Definition:

The upper EC limit indicating ecological stress in aquatic ecosystems of temperate semi-arid shrublands and open woodlands under industrial use.

Justification:

Based on biological response data from sensitive indicator species like diatoms showing significant ecological stress at this level.

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,

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

View Source

Supporting Sources (19)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) The Impact of Extreme Low Flows on the Water Quality of the Lower Murray River and Lakes (South Australia) - ResearchGate, accessed May 10, 2025,
(PDF) The Impact of Extreme Low Flows on the Water Quality of the Lower Murray River and Lakes (South Australia) - ResearchGate, accessed May 10, 2025,
Contextual Support Journal

Water in mining and industry

View Source
Preview of (PDF) Water resources management and mining industry in arid and semi-arid regions - ResearchGate
(PDF) Water resources management and mining industry in arid and semi-arid regions - ResearchGate
Contextual Support

(PDF) Water resources management and mining industry in arid and semi-arid regions - ResearchGate

View Source
Preview of Australian and New Zealand Guidelines for Fresh and Marine Water Quality
Australian and New Zealand Guidelines for Fresh and Marine Water Quality
Contextual Support Journal

Australian and New Zealand Guidelines for Fresh and Marine Water Quality

View Source
Preview of Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000), accessed May 11, 2025,
Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000), accessed May 11, 2025,
Contextual Support Journal

Northern Territory Government (2020) Darwin Harbour Region Water Quality Objectives, Report Card Section 3.0.

View Source
Preview of Australian and New Zealand Guidelines for Fresh and Marine Water Quality, accessed August 2, 2025,
Australian and New Zealand Guidelines for Fresh and Marine Water Quality, accessed August 2, 2025,
Contextual Support

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

View Source
Preview of Darling River ecosystem | EBSCO Research Starters
Darling River ecosystem | EBSCO Research Starters
Contextual Support GreyLiterature

A systematic review of ecological attributes that confer resilience to climate change in environmental restoration - PubMed Central, accessed July 20, 2025,

View Source
Preview of DELUGE AND DROUGHT: AUSTRALIA'S WATER SECURITY IN A CHANGING CLIMATE
DELUGE AND DROUGHT: AUSTRALIA'S WATER SECURITY IN A CHANGING CLIMATE
Contextual Support Journal

DELUGE AND DROUGHT: AUSTRALIA'S WATER SECURITY IN A CHANGING CLIMATE

View Source
Preview of Deriving guideline values using reference-site data - Water Quality Australia, accessed August 12, 2025
Deriving guideline values using reference-site data - Water Quality Australia, accessed August 12, 2025
Contextual Support Government

Water Quality Guidelines Home - Water Quality Australia

View Source
Preview of Global synthesis of groundwater recharge in semiarid and arid regions - Bureau of Economic Geology
Global synthesis of groundwater recharge in semiarid and arid regions - Bureau of Economic Geology
Contextual Support Journal

Guideline for Salinity Assessment, Mitigation and Adaptation Using Nuclear and Related Techniques - OAPEN Library

View Source
Preview of Mining and urban impacts on semi-arid freshwater aquatic systems: The example of Mount Isa, Queensland | Request PDF - ResearchGate, accessed July 13, 2025,
Mining and urban impacts on semi-arid freshwater aquatic systems: The example of Mount Isa, Queensland | Request PDF - ResearchGate, accessed July 13, 2025,
Contextual Support Journal

Mining and urban impacts on semi-arid freshwater aquatic systems: the example of Mount Isa, Queensland - Macquarie University Research Portal

View Source
Preview of Salinity - Murray–Darling Basin Authority, accessed August 11, 2025,
Salinity - Murray–Darling Basin Authority, accessed August 11, 2025,
Contextual Support Government

Basin Plan water quality targets; Australian and New Zealand Guidelines for Fresh and Marine Water Quality (ANZG 2018/ANZECC 2000); Australia State of the Environment 2021: Inland water

View Source
Preview of Salinity and water quality
Salinity and water quality
Contextual Support Government

Salinity - Murray–Darling Basin Authority

View Source
Preview of Salinity and water quality
Salinity and water quality
Contextual Support Journal

Salinity and water quality

View Source
Preview of Salinity Management in the Murray–Darling Basin, Australia - MDPI, accessed July 16, 2025,
Salinity Management in the Murray–Darling Basin, Australia - MDPI, accessed July 16, 2025,
Contextual Support Journal

Salinity Management in the Murray13Darling Basin, Australia - MDPI, accessed July 28, 2025

View Source
Preview of Surface Water Supply in the Western Australian Goldfields - Fact or Fiction? - AusIMM
Surface Water Supply in the Western Australian Goldfields - Fact or Fiction? - AusIMM
Contextual Support GreyLiterature

Surface Water Supply in the Western Australian Goldfields - Fact or Fiction? - AusIMM

View Source
Preview of understanding the new anzecc water quality guidelines - Environmetrics Australia, accessed May 11, 2025,
understanding the new anzecc water quality guidelines - Environmetrics Australia, accessed May 11, 2025,
Contextual Support

Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000), accessed August 1, 2025

View Source
Preview of Water Quality Protection Guideline No. 11 - Government of Western Australia
Water Quality Protection Guideline No. 11 - Government of Western Australia
Contextual Support Journal

Water Quality Protection Guideline No. 11 - Government of Western Australia

View Source
Preview of Water Quality Protection Guidelines No. 5 - Government of Western ..., accessed July 24, 2025
Water Quality Protection Guidelines No. 5 - Government of Western ..., accessed July 24, 2025
Contextual Support Journal

Assessment of Impacts of Coal Mining in the Region of Sydney, Australia on the Aquatic Environment Using Macroinvertebrates and Chlorophyll as Indicators

View Source
Preview of Workshop - on Environmental Management - GEMG
Workshop - on Environmental Management - GEMG
Contextual Support

Workshop - on Environmental Management - GEMG

View Source

Context

  • Region Australia
  • Biome Temperate Semi-Arid Shrublands & Open Woodlands
  • Land Use Industrial & Infrastructure Use
  • Assessment Pristine Reference
  • Evidence Type DegradationThreshold

Lifecycle

  • Status Active
  • Version 1
  • Effective From 20 Mar 2026

Notes

Water exceeding this level is considered ecologically stressed regardless of salinity source; industrial activity contributing to this level constitutes degradation.

Related Benchmarks

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

— µS/cm High
Industrial & Infrastructure Use ยท Pristine Reference
CompositeFramework Active v1