Water Electrical Conductivity (EC)

AUS-TSW-LVG-WEC General Moderate confidence

Benchmark Value

1000 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

The NSW Department of Primary Industries and Environment (DPIE) provides a clear upper boundary for ecosystem health. Their guidance indicates that EC levels greater than 1000 µS/cm can begin to cause damage to aquatic ecosystems and create problems for certain types of irrigated crops.

Metric Definition:

Electrical Conductivity (EC) level at which ecological damage begins in aquatic ecosystems.

Benchmark Definition:

This threshold represents the maximum electrical conductivity level above which ecological damage to aquatic ecosystems and irrigation problems may occur in temperate semi-arid shrublands and open woodlands under livestock grazing.

Justification:

This threshold is based on authoritative guidance from the NSW Department of Primary Industries and Environment indicating ecological harm above this level.

Sources (1)

Preview of Water quality of surface water environments - NSW Government Water, accessed August 1, 2025,

Water quality of surface water environments - NSW Government Water, accessed August 1, 2025, Government

National Guidelines for Water Quality | Department of Natural ...

View Source

Supporting Sources (3)

Additional references from the underlying research that informed this benchmark.

Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000) - Volume 3 - Chapter 9 - Primary Industries

Contextual Support Government

Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000) - Volume 3 - Chapter 9 - Primary Industries

View Source

Salinity - Murray–Darling Basin Authority, accessed August 11, 2025,

Contextual Support Government

Salinity | Murray–Darling Basin Authority

View Source

Water quality guidelines - Queensland Environment Department, accessed August 1, 2025,

Direct Evidence Government

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

View Source

Context

Region Australia
Biome Temperate Semi-Arid Shrublands & Open Woodlands
Land Use Livestock Grazing & Pasture
Assessment Not Stated
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 4
Effective From 10 Jun 2026

Notes

This value represents the critical upper limit for aquatic ecosystem health, beyond which adverse effects on freshwater biota can occur. AssessmentContext defaulted to 'Not Stated' because the source document did not state one. Pipeline quarantine: Lower confidence than existing active benchmark v3 (High). Accepted by operator on 2026-06-10 20:40 UTC — superseded v3 (#3118)

Related Benchmarks

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