Water Electrical Conductivity (EC)

AUS-TSW-IND-WEC General High confidence

Benchmark Value

No specific value — see range

Direction: Lower is desirable ↓

Form: CompositeFramework

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

Discharge must not cause the seasonal background Electrical Conductivity (EC) of the receiving water to vary by more than 10%.

Metric Definition:

Water Electrical Conductivity (EC) as a measure of salinity in receiving waters affected by industrial discharge.

Benchmark Definition:

A performance-based principle that discharge water should not cause more than a 10% variation from the natural seasonal background EC of the receiving waterbody in temperate semi-arid shrublands and open woodlands under industrial use.

Justification:

This principle is derived from the best-practice regulatory model of the Western Australian Department of Water and Environmental Regulation (DWER) and aligns with the national ANZECC/ANZG framework's preference for using local reference conditions.

Sources (1)

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

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

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

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

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

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

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.

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

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,

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

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

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,

Direct Evidence

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

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

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

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

Preview of Salinity and water quality

Salinity and water quality

Contextual Support Government

Salinity - Murray–Darling Basin Authority

Preview of Salinity and water quality

Salinity and water quality

Contextual Support Journal

Salinity and water quality

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

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

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

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

Preview of Workshop - on Environmental Management - GEMG

Workshop - on Environmental Management - GEMG

Contextual Support

Workshop - on Environmental Management - GEMG

Context

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

Lifecycle

Status Active
Version 1
Effective From 20 Mar 2026

Notes

Reflects the naturally high and variable salinity of Australian temperate semi-arid ecosystems and the need for site-specific, adaptive management rather than a fixed numerical benchmark.

Related Benchmarks

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