Water Electrical Conductivity (EC)

AUS-ASC-LVG-WEC General Moderate confidence

Benchmark Value

30 µS/cm

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 OptimalRange Guard OptimalRange Guard MaximumOnly Guard OptimalRange Guard MaximumOnly Guard MaximumOnly Guard OptimalRange Guard MaximumOnly Guard MaximumOnly Guard Point Guard Point Guard MaximumOnly Guard MaximumOnly Guard

Evidence & Context

Any persistent elevation of EC significantly above the natural background range (e.g., consistently exceeding 30-50 µS/cm) likely indicates anthropogenic impact and signifies a departure from "high environmental health."

Metric Definition:

Upper detrimental threshold of water electrical conductivity (EC) above which ecological health is compromised in Australian alpine streams.

Benchmark Definition:

This benchmark sets the maximum acceptable water electrical conductivity (EC) level in Australian alpine streams, above which ecological health is likely compromised due to anthropogenic impacts.

Justification:

Based on observed natural background levels and guidelines, persistent EC above 30 µS/cm indicates anthropogenic impact and potential ecological harm.

Sources (3)

Preview of (PDF) The Effects of Road De-icing Salts on Water Quality and Macroinvertebrates in Australian Alpine Areas - ResearchGate, accessed August 17, 2025,

(PDF) The Effects of Road De-icing Salts on Water Quality and Macroinvertebrates in Australian Alpine Areas - ResearchGate, accessed August 17, 2025,

Shenton, W., et al. (2021). The Effects of Road De-icing Salts on Water Quality and Macroinvertebrates in Australian Alpine Areas. Environmental Pollution, 271, 116322

View Source

Preview of An index of stream condition: reference manual - Water and catchments

An index of stream condition: reference manual - Water and catchments Journal

ANZECC & ARMCANZ. (2000). Australian and New Zealand Guidelines for Fresh and Marine Water Quality. Volume 1: The Guidelines

View Source

Preview of Ladson, A.R., et al. (1999). An Index of Stream Condition: Reference Manual (Second Edition). Department of Natural Resources and Environment, Victoria.

Ladson, A.R., et al. (1999). An Index of Stream Condition: Reference Manual (Second Edition). Department of Natural Resources and Environment, Victoria.

Ladson, A.R., et al. (1999). An Index of Stream Condition: Reference Manual (Second Edition). Department of Natural Resources and Environment, Victoria.

View Source

Supporting Sources (10)

Additional references from the underlying research that informed this benchmark.

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

Catchment Health Indicator Program (CHIP) Report 2015-16

Direct Evidence Journal

Waterwatch (2016). Catchment Health Indicator Program (CHIP) Report 2015-16.

View Source

Preview of Full article: Impacts of Road Disturbance on Soil Properties and on Exotic Plant Occurrence in Subalpine Areas of the Australian Alps - Taylor & Francis Online, accessed May 28, 2025

Full article: Impacts of Road Disturbance on Soil Properties and on Exotic Plant Occurrence in Subalpine Areas of the Australian Alps - Taylor & Francis Online, accessed May 28, 2025

Contextual Support Journal

www.nrc.nsw.gov.au, accessed on May 27, 2025

View Source

Victorian Water Quality Analysis 2022 Technical Report - Water and ..., accessed August 12, 2025,

Direct Evidence Journal

Victorian Water Quality Analysis 2022 Technical Report

View Source

Water for livestock: interpreting water quality tests (NSW DPI)

Direct Evidence Journal

NSW Department of Primary Industries (2024). Water for livestock: interpreting water quality tests.

View Source

Water quality for farm water supplies | Managing dams - Agriculture Victoria, accessed August 1, 2025,

Contextual Support Government

Regenerative Agriculture and Livestock Integration on Australian Cattle Farms

View Source

Water Quality Objectives - Border Rivers - NSW Government, accessed August 12, 2025

Contextual Support Government

(PDF) Impact of mitigated forestry activities on turbidity: assessing ...

View Source

Water Quality of Rivers in the Inglis – Flowerdale Catchment - Department of Natural Resources and Environment Tasmania

Direct Evidence Journal

Derwent Estuary Program (2011). Derwent Catchment Review Part 1.

View Source

Water-Quality-Salinity-Standards.pdf, accessed August 11, 2025,

Contextual Support Journal

(PDF) Effects of increasing salinity on freshwater ecosystems in ..., accessed July 21, 2025

View Source

Williams, W. D. (2005). Chemical composition of some inland surface waters and lake deposits of New South Wales, Australia.

Direct Evidence Journal

Williams, W. D. (2005). Chemical composition of some inland surface waters and lake deposits of New South Wales, Australia.

View Source

Context

Region Australia
Biome Alpine and Subalpine Complex
Land Use Livestock Grazing & Pasture
Assessment Not Stated
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 3 Jun 2026

Notes

This threshold is a conservative indicator of potential degradation from grazing or other land use impacts. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

Other benchmarks in the AUS-ASC-LVG-WEC family.