Water Electrical Conductivity (EC)

AUS-AKW-URB-WEC General Moderate confidence

Benchmark Value

800 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

The final benchmark value of < 800 µS/cm is formally proposed. This value represents a state of minimal saline pollution from urban sources.

Metric Definition:

Water Electrical Conductivity (EC) in surface waters within urbanized Arid Karstic Woodlands & Shrublands biome

Benchmark Definition:

A conservative, protective target for water electrical conductivity representing high ecological health in urbanized arid karstic aquatic ecosystems.

Justification:

Derived from a weight-of-evidence approach integrating national guidelines, ecological tolerance literature, and a degraded case study to ensure protection of sensitive species and life stages.

Sources (4)

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

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

View Source

Naracoorte Creek, Naracoorte 2014 Aquatic Ecosystem Condition ...

Naracoorte Creek, Naracoorte 2014 Aquatic Ecosystem Condition ...

View Source

Salinity - MurrayDarling Basin Authority Journal

Salinity - Murray–Darling Basin Authority

View Source

Preview of Total dissolved solids | Australian Drinking Water Guidelines - NHMRC, accessed July 27, 2025,

Total dissolved solids | Australian Drinking Water Guidelines - NHMRC, accessed July 27, 2025, Government

Australian and New Zealand Guidelines for Fresh and Marine Water Quality

View Source

Context

Region Australia
Biome Arid Karstic Woodlands & Shrublands
Land Use Urban & Developed Use
Assessment Conservation Target
Evidence Type TargetCondition

Lifecycle

Status Active
Version 1
Effective From 4 Jun 2026

Notes

No direct empirical benchmark for a high-health urban system in this specific biome was found. The value is set well below the upper detrimental threshold (~1,500 µS/cm) and below the degraded Naracoorte Creek EC range (1,100–2,500 µS/cm). It aligns with the Murray-Darling Basin Authority's low salinity classification and is suitable for protecting aquatic biota. Additional context: Derived from a weight-of-evidence approach integrating national guidelines, ecological tolerance literature, and a degraded case study to ensure protection of sensitive species and life stages.

Related Benchmarks

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