Water Nitrate

AUS-ASC-FOR-WNI General Moderate confidence

Benchmark Value

0.05 mg/L

Thresholds: Lower: —, Upper: 0.05

Direction: Higher 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 2 benchmarks together — the Point form drives the primary score, while 1 guard(s) constrain the result.

Contributing Benchmarks

Point Primary MaximumOnly Guard

Evidence & Context

The reference value is presented as <0.05 mg/L NO3− for practical reporting, rounding up slightly from the calculated 0.044 mg/L.

Metric Definition:

Water nitrate concentration in streams representing the best available condition of nature achievable within production forestry in Australian alpine and subalpine complexes.

Benchmark Definition:

A reference value representing the best available condition of water nitrate in production forestry streams in the Australian alpine and subalpine biome.

Justification:

Derived from minimally disturbed catchments and the ANZECC 2000 guidelines for Victorian alpine streams, representing near-pristine conditions.

Sources (1)

Preview of Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000), accessed May 11, 2025,

Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000), accessed May 11, 2025, Journal

Northern Territory Government (2020) Darwin Harbour Region Water Quality Objectives, Report Card Section 3.0.

View Source

Supporting Sources (12)

Additional references from the underlying research that informed this benchmark.

Australia and New Zealand Draft Guidelines for Fresh - Queensland Farmers' Federation

Contextual Support Journal

Australia and New Zealand Draft Guidelines for Fresh - Queensland Farmers' Federation

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Desktop review – Impact of bushfires on water quality, accessed August 10, 2025,

Contextual Support Journal

Desktop review – Impact of bushfires on water quality

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Ecosystem Health - Top of the South Scorecards Freshwater & Terrestrial Ecosystems - The Nature Conservancy, accessed on May 25, 2025,

Contextual Support Journal

Ecosystem Health - Top of the South Scorecards Freshwater & Terrestrial Ecosystems - The Nature Conservancy, accessed March 28, 2026,

View Source

Preview of Establishment of reference or baseline conditions of chemical indicators in New Zealand streams and rivers relative to present conditions - CSIRO Publishing

Establishment of reference or baseline conditions of chemical indicators in New Zealand streams and rivers relative to present conditions - CSIRO Publishing

Contextual Support Journal

Establishment of reference or baseline conditions of chemical indicators in New Zealand streams and rivers relative to present conditions - CSIRO Publishing

View Source

Limitation and retention of nutrients in alpine streams of Switzerland - ResearchGate

Contextual Support

Limitation and retention of nutrients in alpine streams of Switzerland - ResearchGate

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Nitrogen dynamics in alpine soils of south ... - CSIRO Publishing, accessed August 28, 2025,

Contextual Support Journal

Nitrogen dynamics in alpine soils of south-eastern Australia - CSIRO Publishing

View Source

Preview of Persistent Nitrate in Alpine Waters with Changing Atmospheric Deposition and Warming Trends | Environmental Science & Technology - ACS Publications

Persistent Nitrate in Alpine Waters with Changing Atmospheric Deposition and Warming Trends | Environmental Science & Technology - ACS Publications

Contextual Support Journal

Persistent Nitrate in Alpine Waters with Changing Atmospheric Deposition and Warming Trends | Environmental Science & Technology - ACS Publications

View Source

Preview of Review of the current state of knowledge for the monitoring of forestry impacts on waterway health in NSW coastal forests - Natural Resources Commission, accessed August 9, 2025

Review of the current state of knowledge for the monitoring of forestry impacts on waterway health in NSW coastal forests - Natural Resources Commission, accessed August 9, 2025

Contextual Support Journal

Potential effects of climate change on forests and forestry in Australia

View Source

Streamside Forest Buffer Width Needed to Protect Stream Water Quality, Habitat, and Organisms

Contextual Support Journal

Streamside Forest Buffer Width Needed to Protect Stream Water Quality, Habitat, and Organisms

View Source

The legacy of a severe wildfire on stream nitrogen and carbon in headwater catchments - USDA Forest Service

Contextual Support

The legacy of a severe wildfire on stream nitrogen and carbon in headwater catchments - USDA Forest Service

View Source

Toxicant default guideline values technical briefs - Water Quality Australia, accessed July 26, 2025,

Contextual Support Government

Toxicant default guideline values technical briefs

View Source

Water Quality of Rivers in the Inglis – Flowerdale Catchment - Department of Natural Resources and Environment Tasmania

Contextual Support Journal

Water Quality of Rivers in the Inglis – Flowerdale Catchment - Department of Natural Resources and Environment Tasmania

View Source

Context

Region Australia
Biome Alpine and Subalpine Complex
Land Use Production Forestry
Assessment Conservation Target
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 17 Mar 2026

Notes

This value is an aspirational target for best-practice production forestry to maintain water quality nearly indistinguishable from natural pristine conditions.