Water Electrical Conductivity (EC)

AUS-TMI-FOR-WEC General Moderate confidence

Benchmark Value

800 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 MaximumOnly Guard MaximumOnly Guard OptimalRange Guard MaximumOnly Guard OptimalRange Guard OptimalRange Guard MaximumOnly Guard MinimumOnly Guard MaximumOnly Guard OptimalRange Guard

Evidence & Context

The upper guideline of 800 µS/cm is therefore proposed as the upper detrimental threshold for a system aspiring to 'high environmental health' under production forestry.

Metric Definition:

Upper detrimental threshold for electrical conductivity (EC) indicating environmental harm risk in production forestry systems.

Benchmark Definition:

This benchmark represents the upper detrimental threshold for electrical conductivity, above which there is a significant risk of environmental harm in production forestry systems in tropical maritime islands.

Justification:

Sustained EC levels above 800 µS/cm signal failure in management practices to control erosion and solute export, representing a departure from a 'best-on-offer' condition.

Sources (1)

ANZECC & ARMCANZ (2000) guidelines - Water Quality Australia, accessed August 12, 2025 Government

ANZECC & ARMCANZ (2000) guidelines - Water Quality Australia

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Supporting Sources (4)

Additional references from the underlying research that informed this benchmark.

Preview of Investigating the potential for groundwater from different vegetation, soil and landuses to stimulate blooms of the cyanobacterium, Lyngbya majuscula, in coastal waters - CSIRO PUBLISHING | Marine and Freshwater Research

Investigating the potential for groundwater from different vegetation, soil and landuses to stimulate blooms of the cyanobacterium, Lyngbya majuscula, in coastal waters - CSIRO PUBLISHING | Marine and Freshwater Research

Contextual Support Journal

Taking stock. Which way from here? - Norfolk Island's Reef, accessed July 27, 2025

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Norfolk Island Water Resource Assessment

Contextual Support Journal

Norfolk Island Water Resource Assessment

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The most beautiful Australian islands - Tourism Australia, accessed August 2, 2025,

Contextual Support

The most beautiful Australian islands - Tourism Australia, accessed August 4, 2025,

View Source

The relationship between groundwater and surface water character and wetland habitats, Bribie Island, Queensland - ResearchGate

Contextual Support Journal

The relationship between groundwater and surface water character and wetland habitats, Bribie Island, Queensland - ResearchGate

View Source

Context

Region Australia
Biome Tropical & Subtropical Maritime Islands
Land Use Production Forestry
Assessment Not Stated
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 5 Jun 2026

Notes

Exceeding this threshold indicates increasing physiological stress on freshwater organisms and declining biodiversity, marking a significant ecological risk. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

Other benchmarks in the AUS-TMI-FOR-WEC family.