Water Electrical Conductivity (EC)

AUS-TSR-IND-WEC General Moderate confidence

Benchmark Value

20 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 MaximumOnly Guard MaximumOnly Guard OptimalRange Guard OptimalRange Guard MaximumOnly Guard Point Guard OptimalRange Guard MaximumOnly Guard Point Guard MinimumOnly Guard MaximumOnly Guard Point Guard OptimalRange Guard MaximumOnly Guard MaximumOnly Guard

Evidence & Context

Set at approximately 20 µS/cm, this trigger represents a level so close to the natural background that any reading above it warrants closer attention.

Metric Definition:

Natural background electrical conductivity level representing the lower boundary of the functional range in tropical rainforest streams.

Benchmark Definition:

This benchmark represents the natural background electrical conductivity level in tropical rainforest streams, serving as a lower boundary for water quality under industrial land use.

Justification:

Reflects the naturally low-ionic background conditions of tropical rainforest streams and the Ranger Mine 'Focus' trigger as a near-natural state proxy.

Sources (1)

Preview of Assessing discharges from a uranium mine 14 case study - Water Quality Australia, accessed May 14, 2025,
Assessing discharges from a uranium mine 14 case study - Water Quality Australia, accessed May 14, 2025, Government

Water Quality Guidelines Assessing discharges from a uranium ...

View Source

Supporting Sources (24)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) The responses of stream fish to the gradient of conductivity: A case study from the Taizi River, China - ResearchGate
(PDF) The responses of stream fish to the gradient of conductivity: A case study from the Taizi River, China - ResearchGate
Contextual Support Journal

The Effects of Elevated Specific Conductivity on the Chronic Toxicity of Mining Influenced Streams Using Ceriodaphnia dubia - PMC - PubMed Central

View Source
Preview of (PDF) Water and Sediment Quality Indicators for the Gladstone Harbour Report Card 2017 Cover photo by Natalia Muszkat Photography Acknowledgements - ResearchGate
(PDF) Water and Sediment Quality Indicators for the Gladstone Harbour Report Card 2017 Cover photo by Natalia Muszkat Photography Acknowledgements - ResearchGate
Contextual Support GreyLiterature

(PDF) Water and Sediment Quality Indicators for the Gladstone Harbour Report Card 2017 Cover photo by Natalia Muszkat Photography Acknowledgements - ResearchGate

View Source
Preview of (PDF) Water Quality Degradation of Coastal Waterways in the Wet Tropics, Australia, accessed August 2, 2025,
(PDF) Water Quality Degradation of Coastal Waterways in the Wet Tropics, Australia, accessed August 2, 2025,
Contextual Support GreyLiterature

Ecology of streams in a biogeographic isolate 6the Queensland Wet Tropics, Australia, accessed July 21, 2025

View Source
Preview of 1.5.2.1 Surface water - Bioregional Assessments |, accessed August 11, 2025,
1.5.2.1 Surface water - Bioregional Assessments |, accessed August 11, 2025,
Contextual Support Government

Percentage compliance with ANZECC water quality trigger values for aquatic ecosystems, primary contact recreation and secondary

View Source
Preview of A Compendium of Ecological Information on Australia's Northern Tropical Rivers - Report 5 - Water quality - DCCEEW, accessed August 1, 2025,
A Compendium of Ecological Information on Australia's Northern Tropical Rivers - Report 5 - Water quality - DCCEEW, accessed August 1, 2025,
Contextual Support Journal

Threshold Indicator Taxa ANalysis and change points (dots) for the ...

View Source
Preview of A GUIDE TO THE APPLICATION OF THE ANZECC ... - ResearchGate, accessed August 11, 2025,
A GUIDE TO THE APPLICATION OF THE ANZECC ... - ResearchGate, accessed August 11, 2025,
Methodology Source GreyLiterature

Namoi River Water Quality Objectives explained - NSW Government

View Source
Preview of Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000) - V, accessed July 22, 2025
Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000) - V, accessed July 22, 2025
Contextual Support Journal

1.5.2.1 Surface water - Bioregional Assessments |

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,
Regulatory Framework

ANZECC & ARMCANZ (2000) guidelines - Water Quality Australia

View Source
Preview of Branchial osmoregulation in the euryhaline bull shark, Carcharhinus leucas: a molecular analysis of ion transporters - Company of Biologists Journals
Branchial osmoregulation in the euryhaline bull shark, Carcharhinus leucas: a molecular analysis of ion transporters - Company of Biologists Journals
Contextual Support Journal

Branchial osmoregulation in the euryhaline bull shark, Carcharhinus leucas: a molecular analysis of ion transporters - Company of Biologists Journals

View Source
Preview of Bruce Highway Upgrade – Clairview to Prosperine | The APP Group
Bruce Highway Upgrade – Clairview to Prosperine | The APP Group
Contextual Support GreyLiterature

Bruce Highway Upgrade – Clairview to Prosperine | The APP Group

View Source
Preview of Compliance Report - Bruce Highway Cooroy to Curra Section C (Traveston to Woondum) December 2020 - Transport and Main Roads
Compliance Report - Bruce Highway Cooroy to Curra Section C (Traveston to Woondum) December 2020 - Transport and Main Roads
Irrelevant

Compliance Report - Bruce Highway Cooroy to Curra Section C (Traveston to Woondum) December 2020 - Transport and Main Roads

View Source
Preview of Diatom–water quality thresholds in South Australian streams indicate a need for more stringent water quality guidelines - CSIRO PUBLISHING | Marine and Freshwater Research, accessed May 15, 2025,
Diatom–water quality thresholds in South Australian streams indicate a need for more stringent water quality guidelines - CSIRO PUBLISHING | Marine and Freshwater Research, accessed May 15, 2025,
Contextual Support Journal

Diatom–water quality thresholds in South Australian streams indicate a need for more stringent water quality guidelines - CSIRO PUBLISHING | Marine and Freshwater Research

View Source
Preview of Environmental Impact Statement Addendum Western Basin Dredging and Disposal Project - State Development, Infrastructure, Local Government and Planning
Environmental Impact Statement Addendum Western Basin Dredging and Disposal Project - State Development, Infrastructure, Local Government and Planning
Contextual Support Journal

Environmental Impact Statement Addendum Western Basin Dredging and Disposal Project - State Development, Infrastructure, Local Government and Planning

View Source
Preview of Guidelines for the management of water in mines and quarries - Resources Victoria, accessed July 24, 2025
Guidelines for the management of water in mines and quarries - Resources Victoria, accessed July 24, 2025
Contextual Support Government

Guidelines for the management of water in mines and quarries - Resources Victoria

View Source
Preview of Ion Regulation In Fish - Canada.ca
Ion Regulation In Fish - Canada.ca
Contextual Support Journal

Ion Regulation In Fish - Canada.ca

View Source
Preview of Land-use effects on water quality in an intensively managed catchment in the Australian humid tropics - CSIRO PUBLISHING | Marine and Freshwater Research, accessed July 21, 2025
Land-use effects on water quality in an intensively managed catchment in the Australian humid tropics - CSIRO PUBLISHING | Marine and Freshwater Research, accessed July 21, 2025
Contextual Support Journal

Ion regulation in fish gills: recent progress in the cellular and molecular mechanisms

View Source
Preview of National Guidelines for Water Quality - Department of Natural Resources and Environment Tasmania, accessed August 1, 2025,
National Guidelines for Water Quality - Department of Natural Resources and Environment Tasmania, accessed August 1, 2025,
Regulatory Framework

Using the ANZECC Guidelines and Water Quality Objectives in NSW

View Source
Preview of Osmoregulation in the Hawaiian anchialine shrimp Halocaridina rubra (Crustacea: Atyidae): expression of ion transporters, mitochondria-rich cell proliferation and hemolymph osmolality during salinity transfers - Company of Biologists Journals
Osmoregulation in the Hawaiian anchialine shrimp Halocaridina rubra (Crustacea: Atyidae): expression of ion transporters, mitochondria-rich cell proliferation and hemolymph osmolality during salinity transfers - Company of Biologists Journals
Contextual Support Journal

Osmoregulation in the Hawaiian anchialine shrimp Halocaridina rubra (Crustacea: Atyidae): expression of ion transporters, mitochondria-rich cell proliferation and hemolymph osmolality during salinity transfers - Company of Biologists Journals

View Source
Preview of Percentage compliance with ANZECC water quality trigger values for aquatic ecosystems, primary contact recreation and secondary, accessed August 11, 2025
Percentage compliance with ANZECC water quality trigger values for aquatic ecosystems, primary contact recreation and secondary, accessed August 11, 2025
Contextual Support Journal

Environmental Values, Water Quality Objectives and Targets for the Black Ross Water Quality Improvement Plan Appendices December - Creek to Coral

View Source
Preview of Port of Gladstone Western Basin Dredging and Disposal Project - Coordinator-General's report for an environmental impact sta - State Development, Infrastructure and Planning
Port of Gladstone Western Basin Dredging and Disposal Project - Coordinator-General's report for an environmental impact sta - State Development, Infrastructure and Planning
Contextual Support

Port of Gladstone Western Basin Dredging and Disposal Project - Coordinator-General's report for an environmental impact sta - State Development, Infrastructure and Planning

View Source
Preview of The Effects of Elevated Specific Conductivity on the Chronic Toxicity of Mining Influenced Streams Using Ceriodaphnia dubia - PubMed Central, accessed August 10, 2025
The Effects of Elevated Specific Conductivity on the Chronic Toxicity of Mining Influenced Streams Using Ceriodaphnia dubia - PubMed Central, accessed August 10, 2025
Contextual Support Journal

Salinity - Murray–Darling Basin Authority

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)

View Source
Preview of Water Report 2019 - Glencore
Water Report 2019 - Glencore
Contextual Support Journal

Water Report 2019 - Glencore

View Source
Preview of Water stewardship | Leading practice handbooks for sustainable mining
Water stewardship | Leading practice handbooks for sustainable mining
Contextual Support Journal

WATER STEWARDSHIP - Leading Practice Sustainable ...

View Source

Context

  • Region Australia
  • Biome Tropical & Subtropical Rainforests
  • Land Use Industrial & Infrastructure Use
  • Assessment Not Stated
  • Evidence Type ReferenceCondition

Lifecycle

  • Status Active
  • Version 1
  • Effective From 5 Jun 2026

Notes

This is not a critical threshold but the natural state to which biota are adapted. No upper detrimental threshold — higher values are always better up to natural saturation. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

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

42 µS/cm High
Industrial & Infrastructure Use · Not Stated
Point Active v1
30 µS/cm High
Industrial & Infrastructure Use · Not Stated
MaximumOnly Active v1