Water Nitrate — Benchmark Detail

Benchmark Value

0.444 mg/L

Direction: Lower is desirable ↓

Form: Point

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 MaximumOnly Guard MaximumOnly Guard MaximumOnly Guard MinimumOnly Guard MaximumOnly Guard Point Guard OptimalRange Guard MinimumOnly Guard MaximumOnly Guard Point Guard Point Guard MaximumOnly Guard

Evidence & Context

The Australian and New Zealand Guidelines for Fresh and Marine Water Quality (ANZECC 2000) provide a default guideline trigger value for nitrate-nitrite nitrogen of 0.444 mg/L for lowland rivers in South-east Australia.

Metric Definition:

Nitrate-nitrite nitrogen concentration as an early warning trigger for ecological impact in lowland rivers.

Benchmark Definition:

An early warning trigger value for nitrate-nitrite nitrogen concentration indicating potential ecological impact in urban streams within the Temperate Grassy Woodlands & Plains biome.

Justification:

Established guideline value from ANZECC (2000) for minimally disturbed lowland rivers in the target region.

Sources (1)

Preview of Current understanding of the eutrophication process in Australia - ResearchGate, accessed August 17, 2025,

Current understanding of the eutrophication process in Australia - ResearchGate, accessed August 17, 2025, GreyLiterature

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

View Source

Supporting Sources (1)

Additional references from the underlying research that informed this benchmark.

Catchment Health Indicator Program Report 2021 - Upper Murrumbidgee Waterwatch, accessed August 12, 2025,

Direct Evidence Journal

ANZECC/ARMCANZ (2000) Guidelines

View Source

Context

Region Australia
Biome Temperate Grassy Woodlands & Plains
Land Use Urban & Developed Use
Assessment Not Stated
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 3 Jun 2026

Notes

Exceedance indicates departure from reference condition and potential ecological risk. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

Other benchmarks in the AUS-TGP-URB-WNI family.