Water Electrical Conductivity (EC)

AUS-ASC-AGR-WEC General Moderate confidence

Benchmark Value

30 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 13 benchmarks together — the OptimalRange form drives the primary score, while 12 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary UpperThreshold Guard OptimalRange Guard MaximumOnly Guard OptimalRange Guard MinimumOnly Guard MaximumOnly Guard Point Guard MaximumOnly Guard MaximumOnly Guard Point Guard OptimalRange Guard MaximumOnly Guard

Evidence & Context

For the ecological health of the Australian Alpine and Subalpine Complex, an EC level that consistently exceeds approximately 30-50 µS/cm should be considered indicative of potential environmental stress and a departure from natural, high-quality conditions.

Metric Definition:

Electrical conductivity (EC) level above which ecological stress and degradation occur in Australian Alpine and Subalpine aquatic ecosystems.

Benchmark Definition:

Threshold EC level indicating the onset of ecological stress in alpine aquatic ecosystems.

Justification:

This threshold is based on ecological studies and guidelines indicating that EC levels above this range cause harm to sensitive alpine aquatic biota.

Sources (3)

NSW alpine resorts environmental performance report 2020–21 Journal

NSW Alpine Resorts Environmental Performance Report 2020–21

View Source

Preview of Regenerative Organic Agriculture and Human Health: The Interconnection Between Soil, Food Quality, and Nutrition - MDPI, accessed on May 31, 2025

Regenerative Organic Agriculture and Human Health: The Interconnection Between Soil, Food Quality, and Nutrition - MDPI, accessed on May 31, 2025 Journal

Water Quality Australia

View Source

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

Salinity | Murray–Darling Basin Authority

View Source

Context

Region Australia
Biome Alpine and Subalpine Complex
Land Use Agricultural Crop Production
Assessment Not Stated
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 3 Jun 2026

Notes

Consistent exceedance of 30-50 µS/cm EC is linked to environmental stress and deviation from natural conditions in alpine streams. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

Other benchmarks in the AUS-ASC-AGR-WEC family.