Water Electrical Conductivity (EC)

AUS-TGP-URB-WEC General Moderate confidence

Benchmark Value

600 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 6 benchmarks together — the OptimalRange form drives the primary score, while 5 guard(s) constrain the result.

Contributing Benchmarks

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

Evidence & Context

Levels consistently exceeding 600 ³S/cm are detrimental to maintaining a high-health aquatic ecosystem in this context.

Metric Definition:

Upper detrimental threshold of Water Electrical Conductivity (EC) beyond which aquatic ecosystem health declines.

Benchmark Definition:

Detrimental EC level causing loss of sensitive species and community structure shifts in Temperate Grassy Woodlands & Plains under Urban & Developed Use.

Justification:

This threshold is set conservatively before major community-level degradation occurs, based on macroinvertebrate studies and urban stream ecological shifts.

Sources (1)

Preview of Victorian Water Quality Analysis 2022 – Summary Report, accessed August 10, 2025,
Victorian Water Quality Analysis 2022 – Summary Report, accessed August 10, 2025, Journal

Victorian Water Quality Analysis 2022; Macroinvertebrate Responses to Conductivity in Different Bioregions of Victoria, Australia

View Source

Supporting Sources (32)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Determining reference conditions for management and ..., accessed August 5, 2025,
(PDF) Determining reference conditions for management and ..., accessed August 5, 2025,
Contextual Support Journal

Effects of Stock Grazing on Biodiversity Values in Temperate Native Grasslands and Grassy Woodlands in SE Australia: A Literature Review - ACT Government

View Source
Preview of (PDF) Effects of increasing salinity on freshwater ecosystems in Australia - ResearchGate, accessed August 11, 2025,
(PDF) Effects of increasing salinity on freshwater ecosystems in Australia - ResearchGate, accessed August 11, 2025,
Contextual Support GreyLiterature

(PDF) Effects of increasing salinity on freshwater ecosystems in Australia - ResearchGate

View Source
Preview of All About Salinity - Environment and Heritage, accessed August 11, 2025
All About Salinity - Environment and Heritage, accessed August 11, 2025
Contextual Support

All About Salinity - Environment and Heritage, accessed August 11, 2025

View Source
Preview of ANZECC & ARMCANZ (2000) guidelines - Water Quality Australia, accessed August 12, 2025
ANZECC & ARMCANZ (2000) guidelines - Water Quality Australia, accessed August 12, 2025
Regulatory Framework Government

ANZECC & ARMCANZ (2000) guidelines - Water Quality Australia

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 Conservation Advice for Lowland Grassy Woodland in the South East Corner Bioregion, accessed August 12, 2025,
Conservation Advice for Lowland Grassy Woodland in the South East Corner Bioregion, accessed August 12, 2025,
Contextual Support Journal

The Cumberland Plain and its vegetation - Environment and Heritage

View Source
Preview of Cooks River - Strathfield Council, accessed August 11, 2025
Cooks River - Strathfield Council, accessed August 11, 2025
Contextual Support Government

Cooks River - Strathfield Council, accessed August 11, 2025

View Source
Preview of CRC for Water Sensitive Cities, accessed August 11, 2025
CRC for Water Sensitive Cities, accessed August 11, 2025
Contextual Support Journal

CRC for Water Sensitive Cities, accessed August 11, 2025

View Source
Preview of Design of Stormwater Treatment and Retention Systems in the Little Stringybark Creek Catchment - urbanstreams.net, accessed August 11, 2025, ).pdf
Design of Stormwater Treatment and Retention Systems in the Little Stringybark Creek Catchment - urbanstreams.net, accessed August 11, 2025, ).pdf
Contextual Support

Design of Stormwater Treatment and Retention Systems in the Little Stringybark Creek Catchment - urbanstreams.net, accessed August 11, 2025, ).pdf

View Source
Preview of Dobsons Creek disconnection project - CRC for Water sensitive cities, accessed August 11, 2025
Dobsons Creek disconnection project - CRC for Water sensitive cities, accessed August 11, 2025
Contextual Support GreyLiterature

Dobsons Creek disconnection project - CRC for Water sensitive cities, accessed August 11, 2025

View Source
Preview of Effectiveness of Water-Sensitive Urban Design Techniques on Stormwater Quantity Management at a Residential Allotment Scale - MDPI, accessed August 2, 2025,
Effectiveness of Water-Sensitive Urban Design Techniques on Stormwater Quantity Management at a Residential Allotment Scale - MDPI, accessed August 2, 2025,
Contextual Support

Effectiveness of Water-Sensitive Urban Design Techniques on Stormwater Quantity Management at a Residential Allotment Scale - MDPI, accessed August 11, 2025

View Source
Preview of Ensuring protection of Little Stringybark Creek - Tasmanian Planning Commission, accessed August 11, 2025,
Ensuring protection of Little Stringybark Creek - Tasmanian Planning Commission, accessed August 11, 2025,
Contextual Support Journal

Ensuring protection of Little Stringybark Creek - Tasmanian Planning Commission, accessed August 11, 2025

View Source
Preview of Environmental Stewardship - Box Gum Grassy Woodland Project - Information Booklet - DCCEEW, accessed August 12, 2025,
Environmental Stewardship - Box Gum Grassy Woodland Project - Information Booklet - DCCEEW, accessed August 12, 2025,
Contextual Support Journal

The Nature of Soil - Local Land Services

View Source
Preview of Jurisdictional information - Water Quality Australia, accessed August 10, 2025
Jurisdictional information - Water Quality Australia, accessed August 10, 2025
Contextual Support Government

Jurisdictional information - Water Quality Australia, accessed August 11, 2025

View Source
Preview of Moving toward Water Sensitive Cities, accessed August 11, 2025
Moving toward Water Sensitive Cities, accessed August 11, 2025
Contextual Support Journal

Moving toward Water Sensitive Cities, accessed August 11, 2025

View Source
Preview of Namoi River Water Quality Objectives explained - NSW Government, accessed August 11, 2025,
Namoi River Water Quality Objectives explained - NSW Government, accessed August 11, 2025,
Regulatory Framework Government

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

View Source
Preview of Nationally Threatened Ecological Communities of the Victorian Volcanic Plain: Natural Temperate Grassland & Grassy Eucalypt Woodland - DCCEEW, accessed August 12, 2025,
Nationally Threatened Ecological Communities of the Victorian Volcanic Plain: Natural Temperate Grassland & Grassy Eucalypt Woodland - DCCEEW, accessed August 12, 2025,
Contextual Support Journal

NSW National Parks and Wildlife Service. (2006). Woodland Remnants and Dryland Salinity: Impacts of dryland salinity on woodland remnants in the Southern Tablelands and South-West Slopes of New South Wales.

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 Processes underpinning natural capital account compilation highlight the potential for low-input grazing to mitigate farm carbon emissions while also improving biodiversity outcomes - CSIRO PUBLISHING | The Rangeland Journal, accessed August 12, 2025,
Processes underpinning natural capital account compilation highlight the potential for low-input grazing to mitigate farm carbon emissions while also improving biodiversity outcomes - CSIRO PUBLISHING | The Rangeland Journal, accessed August 12, 2025,
Contextual Support Journal

Vegetation change in an urban grassy woodland 1974–2000 - CSIRO Publishing

View Source
Preview of Resources - CRC for Water sensitive cities, accessed August 11, 2025
Resources - CRC for Water sensitive cities, accessed August 11, 2025
Contextual Support GreyLiterature

Resources - CRC for Water sensitive cities, accessed August 11, 2025

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

Salinity | Murray–Darling Basin Authority

View Source
Preview of Salinity | Land and soil - Environment and Heritage - NSW Government, accessed August 11, 2025
Salinity | Land and soil - Environment and Heritage - NSW Government, accessed August 11, 2025
Contextual Support Government

Australia state of the environment 2021: land, accessed July 28, 2025

View Source
Preview of Scattered trees and biodiversity - Environment and Heritage, accessed August 11, 2025
Scattered trees and biodiversity - Environment and Heritage, accessed August 11, 2025
Contextual Support Government

Scattered trees and biodiversity - Environment and Heritage, accessed August 11, 2025

View Source
Preview of ten key steps to conserving Australia's temperate eucalypt woodlands - the UWA Profiles and Research Repository, accessed August 4, 2025
ten key steps to conserving Australia's temperate eucalypt woodlands - the UWA Profiles and Research Repository, accessed August 4, 2025
Contextual Support

Sustainable forest management and the ecosystem approach - an Australian perspective

View Source
Preview of Timeline of the Little Stringybark Creek (LSC) project. Ecological ..., accessed August 11, 2025,
Timeline of the Little Stringybark Creek (LSC) project. Ecological ..., accessed August 11, 2025,
Contextual Support GreyLiterature

Timeline of the Little Stringybark Creek (LSC) project. Ecological - ResearchGate, accessed August 11, 2025

View Source
Preview of Using the ANZECC Guidelines and Water Quality Objectives in NSW, accessed August 11, 2025,
Using the ANZECC Guidelines and Water Quality Objectives in NSW, accessed August 11, 2025,
Regulatory Framework Journal

Reference-site data - Water Quality Australia

View Source
Preview of Water Assessment Water Quality Report Series
Water Assessment Water Quality Report Series
Contextual Support

Water Assessment Water Quality Report Series, accessed August 11, 2025

View Source
Preview of Water Quality | Cooks River Valley Association, accessed August 11, 2025
Water Quality | Cooks River Valley Association, accessed August 11, 2025
Contextual Support GreyLiterature

Water Quality | Cooks River Valley Association, accessed August 11, 2025

View Source
Preview of Water quality indicator: Electrical conductivity - Queen Mary University of London, accessed August 11, 2025,
Water quality indicator: Electrical conductivity - Queen Mary University of London, accessed August 11, 2025,
Contextual Support Journal

www.qmul.ac.uk

View Source
Preview of Water quality testing | Melbourne Water, accessed August 11, 2025
Water quality testing | Melbourne Water, accessed August 11, 2025
Contextual Support Government

Water quality testing | Melbourne Water, accessed August 11, 2025

View Source
Preview of water sensitive urban design - a stormwater management perspective - eWater, accessed August 11, 2025
water sensitive urban design - a stormwater management perspective - eWater, accessed August 11, 2025
Contextual Support Journal

water sensitive urban design - a stormwater management perspective - eWater, accessed August 11, 2025

View Source
Preview of Water Sensitive Urban Design Guidelines - Melbourne Water, accessed July 21, 2025,
Water Sensitive Urban Design Guidelines - Melbourne Water, accessed July 21, 2025,
Contextual Support Journal

Section 13 – Water Sensitive Urban Design (WSUD) Guidelines - City of Gold Coast, accessed July 13, 2025

View Source

Context

  • Region Australia
  • Biome Temperate Grassy Woodlands & Plains
  • Land Use Urban & Developed Use
  • Assessment Conservation Target
  • Evidence Type DegradationThreshold

Lifecycle

  • Status Active
  • Version 1
  • Effective From 3 Jun 2026

Notes

Represents a conservative upper limit to avoid significant ecological harm in urban streams.

Related Benchmarks

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

100 μS/cm Moderate
Urban & Developed Use · Conservation Target
Point Active v1
— μS/cm Moderate
Urban & Developed Use · Conservation Target
OptimalRange Active v1