Water Nitrate

AUS-ASC-AGR-WNI General Low confidence

Benchmark Value

No specific value — see range
Direction: Lower is desirable ↓
Form: CompositeFramework

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

Evidence & Context

Natural, undisturbed alpine and subalpine headwaters in Australia typically exhibit extremely low nitrate concentrations, often below 0.06 mg N/L, with some studies reporting levels near or below 0.001 mg N/L. The Australian and New Zealand Environment and Conservation Council (ANZECC) guidelines provide a default trigger value (DTV) for oxides of nitrogen (NOx-N) in upland rivers of 0.19 mg N/L to protect aquatic ecosystems in slightly to moderately disturbed catchments.

Metric Definition:

Water nitrate concentration in upland rivers and alpine/subalpine headwaters under agricultural crop production.

Benchmark Definition:

This benchmark represents natural background nitrate levels in alpine and subalpine headwaters in Australia, with an ecological protection threshold set by the ANZECC default trigger value for upland rivers under agricultural crop production.

Justification:

The benchmark is based on the absence of direct empirical data for best-practice agricultural crop production in the Australian alpine/subalpine biome, relying on natural background levels and the ANZECC 2000 default trigger value as an ecological protection threshold.

Sources (2)

Preview of Characterising alpine peatland water quality on the Bogong High Plains, Victoria - Threatened Species Recovery Hub
Characterising alpine peatland water quality on the Bogong High Plains, Victoria - Threatened Species Recovery Hub Journal

Toxicant default guideline values for aquatic ecosystem protection ...

View Source
Preview of Chemical regulation of alpine headwater streams during a storm event (Bogong High Plains, Victoria, Australia) | Request PDF - ResearchGate
Chemical regulation of alpine headwater streams during a storm event (Bogong High Plains, Victoria, Australia) | Request PDF - ResearchGate Journal

Chemical regulation of alpine headwater streams during a storm event (Bogong High Plains, Victoria, Australia) | Request PDF - ResearchGate

View Source

Supporting Sources (23)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Stable isotopes of nitrate reveal different nitrogen processing mechanisms in streams across a land use gradient during wet and dry periods - ResearchGate, accessed on May 31, 2025
(PDF) Stable isotopes of nitrate reveal different nitrogen processing mechanisms in streams across a land use gradient during wet and dry periods - ResearchGate, accessed on May 31, 2025
Contextual Support Journal

Effects of fertilization on soil nematode communities in an alpine meadow of Qinghai-Tibet plateau - Frontiers

View Source
Preview of (PDF) The Effects of Road De-icing Salts on Water Quality and Macroinvertebrates in Australian Alpine Areas - ResearchGate, accessed August 17, 2025,
(PDF) The Effects of Road De-icing Salts on Water Quality and Macroinvertebrates in Australian Alpine Areas - ResearchGate, accessed August 17, 2025,
Contextual Support

Shenton, W., et al. (2021). The Effects of Road De-icing Salts on Water Quality and Macroinvertebrates in Australian Alpine Areas. Environmental Pollution, 271, 116322

View Source
Preview of (PDF) When do cover crops reduce nitrate leaching? A global meta‐analysis
(PDF) When do cover crops reduce nitrate leaching? A global meta‐analysis
Contextual Support Journal

Cover Crops and Fertilization Alter Nitrogen Loss in Organic and Conventional Conservation Agriculture Systems - Frontiers

View Source
Preview of A Bayesian approach to understanding the key factors influencing temporal variability in stream water quality – a case study in the Great Barrier Reef catchments - HESS - Recent, accessed on May 31, 2025
A Bayesian approach to understanding the key factors influencing temporal variability in stream water quality – a case study in the Great Barrier Reef catchments - HESS - Recent, accessed on May 31, 2025
Contextual Support Journal

A Bayesian approach to understanding the key factors influencing temporal variability in stream water quality – a case study in the Great Barrier Reef catchments - HESS - Recent

View Source
Preview of Cover Crops and Fertilization Alter Nitrogen Loss in Organic and Conventional Conservation Agriculture Systems - Frontiers, accessed August 5, 2025
Cover Crops and Fertilization Alter Nitrogen Loss in Organic and Conventional Conservation Agriculture Systems - Frontiers, accessed August 5, 2025
Contextual Support

Regenerative Organic Agriculture and Human Health: The Interconnection Between Soil, Food Quality, and Nutrition - PMC - PubMed Central

View Source
Preview of DRINKING WATER QUALITY ANNUAL REPORT 2022-2023, accessed August 17, 2025,
DRINKING WATER QUALITY ANNUAL REPORT 2022-2023, accessed August 17, 2025,
Contextual Support Journal

Full article: Evaluating the impact of low intensity farming on alpine river water quality: case study from south Westland, Aotearoa New Zealand

View Source
Preview of Effects of fertilization on soil nematode communities in an alpine meadow of Qinghai-Tibet plateau - Frontiers, accessed on May 31, 2025
Effects of fertilization on soil nematode communities in an alpine meadow of Qinghai-Tibet plateau - Frontiers, accessed on May 31, 2025
Contextual Support Journal

Using the ANZECC Guidelines and Water Quality Objectives in NSW

View Source
Preview of Environmental Effects of Conservation Practices on Grazing Lands - USDA ARS
Environmental Effects of Conservation Practices on Grazing Lands - USDA ARS
Contextual Support Journal

Irrigation and fertiliser strategies for minimising nitrogen leaching from turfgrass Louise Barton and Tim Colmer School of Plan - Agronomy Australia Proceedings

View Source
Preview of Estimated Nitrate Concentrations in Groundwater Used for Drinking | US EPA, accessed August 8, 2025
Estimated Nitrate Concentrations in Groundwater Used for Drinking | US EPA, accessed August 8, 2025
Contextual Support Government

Review of water quality studies in the Australian Alps

View Source
Preview of February | 2016 | The Freshwater Blog, accessed on May 31, 2025
February | 2016 | The Freshwater Blog, accessed on May 31, 2025
Contextual Support GreyLiterature

Full article: Climate change adaptation for drinking water and ecological flows through sustainable agricultural practices - Taylor & Francis Online: Peer-reviewed Journals

View Source
Preview of Full article: Climate change adaptation for drinking water and ecological flows through sustainable agricultural practices - Taylor & Francis Online: Peer-reviewed Journals, accessed on May 31, 2025
Full article: Climate change adaptation for drinking water and ecological flows through sustainable agricultural practices - Taylor & Francis Online: Peer-reviewed Journals, accessed on May 31, 2025
Contextual Support

Estimated Nitrate Concentrations in Groundwater Used for Drinking | US EPA

View Source
Preview of Full article: Evaluating the impact of low intensity farming on alpine river water quality: case study from south Westland, Aotearoa New Zealand, accessed on May 31, 2025
Full article: Evaluating the impact of low intensity farming on alpine river water quality: case study from south Westland, Aotearoa New Zealand, accessed on May 31, 2025
Contextual Support Journal

Full article: Evaluating the impact of low intensity farming on alpine river water quality: case study from south Westland, Aotearoa New Zealand, accessed on May 31, 2025

View Source
Preview of Irrigation and fertiliser strategies for minimising nitrogen leaching from turfgrass Louise Barton and Tim Colmer School of Plan - Agronomy Australia Proceedings, accessed on May 31, 2025
Irrigation and fertiliser strategies for minimising nitrogen leaching from turfgrass Louise Barton and Tim Colmer School of Plan - Agronomy Australia Proceedings, accessed on May 31, 2025
Contextual Support Journal

Irrigation and fertiliser strategies for minimising nitrogen leaching from turfgrass Louise Barton and Tim Colmer School of Plan - Agronomy Australia Proceedings, accessed on May 31, 2025

View Source
Preview of National Guidelines for Water Quality - Department of Natural Resources and Environment Tasmania, accessed August 1, 2025,
National Guidelines for Water Quality - Department of Natural Resources and Environment Tasmania, accessed August 1, 2025,
Regulatory Framework

Using the ANZECC Guidelines and Water Quality Objectives in NSW

View Source
Preview of Nitrogen dynamics in alpine soils of south ... - CSIRO Publishing, accessed August 28, 2025,
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 Regenerative Organic Agriculture and Human Health: The Interconnection Between Soil, Food Quality, and Nutrition - PMC - PubMed Central, accessed July 7, 2025,
Regenerative Organic Agriculture and Human Health: The Interconnection Between Soil, Food Quality, and Nutrition - PMC - PubMed Central, accessed July 7, 2025,
Contextual Support Journal

Technical Note No.3 - Effects of Residue Management and No-Till on Soil Quality - Natural Resources Conservation Service

View Source
Preview of Review of water quality studies in the Australian Alps, accessed August 12, 2025,
Review of water quality studies in the Australian Alps, accessed August 12, 2025,
Contextual Support Government

Feral horses (Equus caballus) increase suspended sediment in subalpine streams

View Source
Preview of Sustaining the Australian Alps | TERN Australia, accessed August 17, 2025,
Sustaining the Australian Alps | TERN Australia, accessed August 17, 2025,
Contextual Support Government

Sustaining the Australian Alps | TERN Australia

View Source
Preview of The water quality and economic benefits of agricultural management practices, accessed August 5, 2025
The water quality and economic benefits of agricultural management practices, accessed August 5, 2025
Contextual Support Journal

DRINKING WATER QUALITY ANNUAL REPORT 2022-2023 - Alpine Resorts Victoria

View Source
Preview of understanding the new anzecc water quality guidelines - Environmetrics Australia, accessed May 11, 2025,
understanding the new anzecc water quality guidelines - Environmetrics Australia, accessed May 11, 2025,
Contextual Support

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

View Source
Preview of Using the ANZECC Guidelines and Water Quality Objectives in NSW, accessed August 11, 2025,
Using the ANZECC Guidelines and Water Quality Objectives in NSW, accessed August 11, 2025,
Contextual Support Journal

Reference-site data - Water Quality Australia

View Source
Preview of Water resources and nitrate discharges in relation to agricultural land uses in an intensively irrigated watershed | Request PDF - ResearchGate, accessed on May 31, 2025
Water resources and nitrate discharges in relation to agricultural land uses in an intensively irrigated watershed | Request PDF - ResearchGate, accessed on May 31, 2025
Contextual Support Journal

The water quality and economic benefits of agricultural management practices

View Source
Preview of Water use efficiency in Western Australian cropping systems - BioOne Complete, accessed on May 31, 2025
Water use efficiency in Western Australian cropping systems - BioOne Complete, accessed on May 31, 2025
Contextual Support Journal

Water use efficiency in Western Australian cropping systems - BioOne Complete

View Source

Context

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

Lifecycle

  • Status Active
  • Version 1
  • Effective From 3 Jun 2026

Notes

Natural background nitrate concentrations are extremely low (<0.06 mg N/L, often <0.001 mg N/L). The ANZECC DTV of 0.19 mg N/L serves as an upper boundary that should not be approached by systems claiming high environmental health. The confidence is low due to lack of direct field data. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.