Water Electrical Conductivity (EC)

AUS-TSR-URB-WEC General Moderate confidence

Benchmark Value

300 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

Based on this synthesis, a benchmark of < 300 ³S/cm is proposed as the best available condition for urban streams in this biome.

Metric Definition:

Water Electrical Conductivity (EC) benchmark representing the best available condition achievable in urbanized catchments.

Benchmark Definition:

Maximum electrical conductivity benchmark representing the best available condition achievable in urban streams of tropical & subtropical rainforests under urban and developed land use.

Justification:

Derived using a referential approach applying a realistic impact factor to the 80th percentile of pristine reference conditions and considering national guidelines.

Sources (2)

Preview of Ecology of streams in a biogeographic isolate—the Queensland Wet Tropics, Australia | Freshwater Science: Vol 34, No 2, accessed July 22, 2025,
Ecology of streams in a biogeographic isolate—the Queensland Wet Tropics, Australia | Freshwater Science: Vol 34, No 2, accessed July 22, 2025, Journal

Australian and New Zealand Guidelines for Fresh and Marine Water Quality (ANZECC/ARMCANZ)

View Source
Preview of Water-Quality-Salinity-Standards.pdf, accessed August 11, 2025,
Water-Quality-Salinity-Standards.pdf, accessed August 11, 2025, Journal

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

View Source

Supporting Sources (15)

Additional references from the underlying research that informed this benchmark.

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,
Direct Evidence GreyLiterature

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

View Source
Preview of A Bayesian approach to understanding the key factors influencing temporal variability in stream water quality – a case study in the Great Barrier Reef catchments - HESS
A Bayesian approach to understanding the key factors influencing temporal variability in stream water quality – a case study in the Great Barrier Reef catchments - HESS
Contextual Support Journal

(PDF) Water Quality Degradation of Coastal Waterways in the Wet Tropics, Australia, accessed July 21, 2025

View Source
Preview of Effects of salinity on stream ecosystems: improving models for macroinvertebrates - CSIRO Research Publications Repository, accessed July 21, 2025
Effects of salinity on stream ecosystems: improving models for macroinvertebrates - CSIRO Research Publications Repository, accessed July 21, 2025
Direct Evidence

Effects of salinity on stream ecosystems: improving models for macroinvertebrates - CSIRO Research Publications Repository, accessed July 21, 2025

View Source
Preview of Global perspectives on the urban stream syndrome | Freshwater Science: Vol 35, No 1, accessed July 21, 2025
Global perspectives on the urban stream syndrome | Freshwater Science: Vol 35, No 1, accessed July 21, 2025
Contextual Support Journal

Global perspectives on the urban stream syndrome | Freshwater Science: Vol 35, No 1, accessed July 21, 2025

View Source
Preview of Impact of secondary salinisation on freshwater ecosystems: effects of contrasting, experimental, short-term releases of saline wastewater on macroinvertebrates in a lowland stream - CSIRO Publishing, accessed August 8, 2025,
Impact of secondary salinisation on freshwater ecosystems: effects of contrasting, experimental, short-term releases of saline wastewater on macroinvertebrates in a lowland stream - CSIRO Publishing, accessed August 8, 2025,
Methodology Source Government

Comparison of two commonly used methods for identifying water quality thresholds in freshwater ecosystems using field and synthetic data - PubMed

View Source
Preview of Nonpoint Source: Urban Areas | US EPA, accessed July 21, 2025
Nonpoint Source: Urban Areas | US EPA, accessed July 21, 2025
Contextual Support Journal

(PDF) An Overview of Water Sensitive Urban Design Practices in Australia - ResearchGate, accessed July 21, 2025

View Source
Preview of State of the Environment 2023 | Stormwater, accessed July 13, 2025,
State of the Environment 2023 | Stormwater, accessed July 13, 2025,
Contextual Support Government

Characterising the relationship between water quality and water quantity, accessed July 21, 2025

View Source
Preview of Stormwater - State of the Environment Report 2023, accessed July 21, 2025
Stormwater - State of the Environment Report 2023, accessed July 21, 2025
Contextual Support Journal

Stormwater - State of the Environment Report 2023, accessed July 21, 2025

View Source
Preview of Stormwater Management in a Water Sensitive City blueprint2012, accessed July 21, 2025
Stormwater Management in a Water Sensitive City blueprint2012, accessed July 21, 2025
Contextual Support

Stormwater Management in a Water Sensitive City blueprint2012, accessed July 21, 2025

View Source
Preview of Water quality guidelines - Queensland Environment Department, accessed August 1, 2025,
Water quality guidelines - Queensland Environment Department, accessed August 1, 2025,
Regulatory Framework Government

Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000)

View Source
Preview of Water quality guidelines - Queensland Environment Department, accessed August 4, 2025,
Water quality guidelines - Queensland Environment Department, accessed August 4, 2025,
Regulatory Framework Journal

Seasonal changes in water quality and macrophytes and the ...

View Source
Preview of Water Sensitive Urban Design - Townsville City Council, accessed August 2, 2025,
Water Sensitive Urban Design - Townsville City Council, accessed August 2, 2025,
Contextual Support Journal

Human society and wellbeing | Australia state of the environment 2021

View Source
Preview of Water Sensitive Urban Design in North Queensland, accessed July 13, 2025,
Water Sensitive Urban Design in North Queensland, accessed July 13, 2025,
Contextual Support GreyLiterature

HLW Report Card - Healthy Land & Water, accessed July 21, 2025

View Source
Preview of Water-Sensitive Urban Design (WSUD) Performance in Mitigating ..., accessed July 21, 2025,
Water-Sensitive Urban Design (WSUD) Performance in Mitigating ..., accessed July 21, 2025,
Contextual Support Journal

Water-Sensitive Urban Design (WSUD) Performance in Mitigating Urban Flooding in a Wet Tropical North Queensland Sub-Catchment - MDPI, accessed July 21, 2025

View Source
Preview of www.rrrc.org.au, accessed May 15, 2025,
www.rrrc.org.au, accessed May 15, 2025,
Contextual Support Journal

Sediments and nutrients in north Queensland tropical streams: changes with agricultural development and pristine condition status (Technical Report No. 62, Australian Rainforest CRC, 2006)

View Source

Context

  • Region Australia
  • Biome Tropical & Subtropical Rainforests
  • Land Use Urban & Developed Use
  • Assessment Conservation Target
  • Evidence Type TargetCondition

Lifecycle

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

Notes

Represents a plausible and significant improvement over typical urban conditions, acknowledging residual urban impacts.

Related Benchmarks

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

— μS/cm High
Urban & Developed Use · Pristine Reference
OptimalRange Active v1
1500 μS/cm Moderate
Urban & Developed Use · Not Stated
MaximumOnly Active v1