Water Nitrate

AUS-TSW-IND-WNI General High confidence

Benchmark Value

1.6 mg/L
Thresholds: Lower: —, Upper: 1.6
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 11 benchmarks together — the OptimalRange form drives the primary score, while 10 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary LowerThreshold Guard MaximumOnly Guard MaximumOnly Guard Point Guard MinimumOnly Guard Point Guard OptimalRange Guard MaximumOnly Guard MaximumOnly Guard Point Guard

Evidence & Context

The final benchmark represents a condition where industrial activity coexists with a state of high environmental health. Indicator Name: Water Nitrate Reference Value: <1.6 Unit: mg/L Source Title: Nitrate in freshwater, Toxicant default guideline values for protecting aquatic ecosystems, technical brief Source URL or DOI: Confidence Level: High Short Notes: The reference value is derived from the chronic toxicity No-Observed-Effect-Concentration (NOEC) for the most sensitive freshwater species (1.6 mg/L as NO3−​) identified in the draft 2025 Australian and New Zealand Guidelines for Fresh and Marine Water Quality (ANZ-G) technical brief. This value represents the upper threshold for maintaining a state of high ecological integrity (equivalent to 99% species protection) and is consistent with the goal of best-practice industrial water stewardship, which aims to have no adverse impact by keeping water quality at or near natural background levels.

Metric Definition:

Water Nitrate concentration in freshwater aquatic ecosystems

Benchmark Definition:

This benchmark defines the maximum nitrate concentration in freshwater that supports high environmental health in industrial areas, based on chronic toxicity thresholds protecting sensitive species.

Justification:

This value is based on the chronic toxicity No-Observed-Effect-Concentration (NOEC) for the most sensitive freshwater species identified in the draft 2025 Australian and New Zealand Guidelines for Fresh and Marine Water Quality (ANZ-G) technical brief, representing 99% species protection.

Sources (1)

Preview of Toxicant default guideline values for aquatic ecosystem protection ..., accessed August 8, 2025
Toxicant default guideline values for aquatic ecosystem protection ..., accessed August 8, 2025 Journal

Nitrate in freshwater, toxicant default guideline values for protecting aquatic ecosystems

View Source

Supporting Sources (43)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Eutrophication in Australian Rivers, Reservoirs and Estuaries  A Southern Hemisphere Perspective on the Science and its Implications - ResearchGate, accessed May 10, 2025,
(PDF) Eutrophication in Australian Rivers, Reservoirs and Estuaries  A Southern Hemisphere Perspective on the Science and its Implications - ResearchGate, accessed May 10, 2025,
Contextual Support Journal

Case studies - Water Sensitive SA

View Source
Preview of 2019/2020 Annual Compliance Assessment Report - Tropicana Joint Venture, accessed July 13, 2025,
2019/2020 Annual Compliance Assessment Report - Tropicana Joint Venture, accessed July 13, 2025,
Contextual Support Journal

2019/2020 Annual Compliance Assessment Report - Tropicana Joint Venture, accessed July 13, 2025,

View Source
Preview of 5.7 Nitrates | Monitoring & Assessment | US EPA, accessed August 1, 2025
5.7 Nitrates | Monitoring & Assessment | US EPA, accessed August 1, 2025
Contextual Support Government

Determining safe levels of ammonia and nitrite for shrimp culture - Global Seafood Alliance, accessed August 1, 2025

View Source
Preview of A GUIDE TO THE APPLICATION OF THE ANZECC ... - ResearchGate, accessed August 11, 2025,
A GUIDE TO THE APPLICATION OF THE ANZECC ... - ResearchGate, accessed August 11, 2025,
Contextual Support GreyLiterature

Namoi River Water Quality Objectives explained - NSW Government

View Source
Preview of A review of water quality studies relevant to northern Australia - CSIRO, accessed July 21, 2025,
A review of water quality studies relevant to northern Australia - CSIRO, accessed July 21, 2025,
Contextual Support Journal

Salinity and water quality

View Source
Preview of ADELONG GOLD MINE PROJECT - International Base Metals Limited, accessed July 13, 2025,
ADELONG GOLD MINE PROJECT - International Base Metals Limited, accessed July 13, 2025,
Contextual Support Journal

ADELONG GOLD MINE PROJECT - International Base Metals Limited, accessed July 13, 2025,

View Source
Preview of AngloGold Ashanti Ltd – Tropicana Gold Mine - The Cyanide Code, accessed July 13, 2025,
AngloGold Ashanti Ltd – Tropicana Gold Mine - The Cyanide Code, accessed July 13, 2025,
Contextual Support Journal

AngloGold Ashanti Ltd – Tropicana Gold Mine - The Cyanide Code, accessed July 13, 2025,

View Source
Preview of Assessment of Impacts of Coal Mining in the Region of Sydney, Australia on the Aquatic Environment Using Macroinvertebrates and Chlorophyll as Indicators, accessed August 17, 2025,
Assessment of Impacts of Coal Mining in the Region of Sydney, Australia on the Aquatic Environment Using Macroinvertebrates and Chlorophyll as Indicators, accessed August 17, 2025,
Contextual Support Journal

Assessment of Impacts of Coal Mining in the Region of Sydney, Australia on the Aquatic Environment Using Macroinvertebrates and Chlorophyll as Indicators, accessed July 13, 2025,

View Source
Preview of Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000) - V, accessed July 22, 2025
Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000) - V, accessed July 22, 2025
Contextual Support Journal

1.5.2.1 Surface water - Bioregional Assessments |

View Source
Preview of Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands - PMC, accessed August 5, 2025,
Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands - PMC, accessed August 5, 2025,
Contextual Support Journal

How should we manage our soils to increase soil carbon?, accessed May 10, 2026

View Source
Preview of Challenger Gold Annual Compliance Report - Mining Data Online, accessed July 13, 2025,
Challenger Gold Annual Compliance Report - Mining Data Online, accessed July 13, 2025,
Contextual Support Journal

Challenger Gold Annual Compliance Report - Mining Data Online, accessed July 13, 2025,

View Source
Preview of Challenger mine - Wikipedia, accessed July 13, 2025,
Challenger mine - Wikipedia, accessed July 13, 2025,
Irrelevant

Challenger mine - Wikipedia, accessed July 13, 2025,

View Source
Preview of Chemotaxonomic responses of autotrophic periphyton communities to nutrient additions in pools of an intermittent stream - ResearchOnline@JCU, accessed July 13, 2025,
Chemotaxonomic responses of autotrophic periphyton communities to nutrient additions in pools of an intermittent stream - ResearchOnline@JCU, accessed July 13, 2025,
Contextual Support Journal

Chemotaxonomic responses of autotrophic periphyton communities to nutrient additions in pools of an intermittent stream - ResearchOnline@JCU, accessed July 13, 2025,

View Source
Preview of Current Major Projects | business.gov.au, accessed July 13, 2025,
Current Major Projects | business.gov.au, accessed July 13, 2025,
Irrelevant

Current Major Projects | business.gov.au, accessed July 13, 2025,

View Source
Preview of Default Guideline Values for Aquatic Ecosystems - EPA Tasmania, accessed July 13, 2025,
Default Guideline Values for Aquatic Ecosystems - EPA Tasmania, accessed July 13, 2025,
Contextual Support Journal

Default Guideline Values for Aquatic Ecosystems - EPA Tasmania, accessed July 13, 2025,

View Source
Preview of East Australian Mediterranean Woodlands & Temperate Savannas ..., accessed July 15, 2025
East Australian Mediterranean Woodlands & Temperate Savannas ..., accessed July 15, 2025
Contextual Support

Plants of the mallee shrublands - Australian National Botanic Gardens, accessed July 13, 2025

View Source
Preview of Environment - AngloGold Ashanti, accessed July 13, 2025,
Environment - AngloGold Ashanti, accessed July 13, 2025,
Irrelevant

Environment - AngloGold Ashanti, accessed July 13, 2025,

View Source
Preview of Environmental Impact Statement assessment report under the Environmental Protection Act 1994, Bauxite Hills Project proposed by - Queensland Government, accessed July 13, 2025,
Environmental Impact Statement assessment report under the Environmental Protection Act 1994, Bauxite Hills Project proposed by - Queensland Government, accessed July 13, 2025,
Contextual Support Journal

Environmental Impact Statement assessment report under the Environmental Protection Act 1994, Bauxite Hills Project proposed by - Queensland Government, accessed July 13, 2025,

View Source
Preview of Great Western Woodlands - Wikipedia, accessed July 10, 2025,
Great Western Woodlands - Wikipedia, accessed July 10, 2025,
Contextual Support GreyLiterature

Great Western Woodlands - Wikipedia

View Source
Preview of Guidelines for the management of water in mines and quarries - Resources Victoria, accessed July 24, 2025
Guidelines for the management of water in mines and quarries - Resources Victoria, accessed July 24, 2025
Contextual Support Government

Guidelines for the management of water in mines and quarries - Resources Victoria

View Source
Preview of Mining and urban impacts on semi-arid freshwater aquatic systems: The example of Mount Isa, Queensland | Request PDF - ResearchGate, accessed July 13, 2025,
Mining and urban impacts on semi-arid freshwater aquatic systems: The example of Mount Isa, Queensland | Request PDF - ResearchGate, accessed July 13, 2025,
Contextual Support Journal

Mining and urban impacts on semi-arid freshwater aquatic systems: the example of Mount Isa, Queensland - Macquarie University Research Portal

View Source
Preview of New guide to support water management and reporting - Minerals Council of Australia, accessed July 13, 2025,
New guide to support water management and reporting - Minerals Council of Australia, accessed July 13, 2025,
Contextual Support Government

New guide to support water management and reporting - Minerals Council of Australia, accessed July 13, 2025,

View Source
Preview of New Study: 74% of U.S. gold mines pollute water - Earthworks, accessed July 13, 2025,
New Study: 74% of U.S. gold mines pollute water - Earthworks, accessed July 13, 2025,
Contextual Support GreyLiterature

New Study: 74% of U.S. gold mines pollute water - Earthworks, accessed July 13, 2025,

View Source
Preview of Nitrate + nitrite as NO3 - SA Water, accessed July 13, 2025,
Nitrate + nitrite as NO3 - SA Water, accessed July 13, 2025,
Contextual Support Government

Nitrate + nitrite as NO3 - SA Water, accessed July 13, 2025,

View Source
Preview of Nitrate and nitrite | Australian Drinking Water Guidelines - NHMRC, accessed August 8, 2025
Nitrate and nitrite | Australian Drinking Water Guidelines - NHMRC, accessed August 8, 2025
Contextual Support Government

Australian and New Zealand Guidelines for Fresh and Marine Water Quality (ANZG 2018)

View Source
Preview of Nitrate Contamination in Drinking Water: Understanding the Risks and Solutions, accessed July 13, 2025,
Nitrate Contamination in Drinking Water: Understanding the Risks and Solutions, accessed July 13, 2025,
Contextual Support GreyLiterature

Nitrate Contamination in Drinking Water: Understanding the Risks and Solutions, accessed July 13, 2025,

View Source
Preview of Nitrate in freshwater, toxicant default guideline values for protecting ..., accessed August 8, 2025
Nitrate in freshwater, toxicant default guideline values for protecting ..., accessed August 8, 2025
Direct Evidence Government

Nitrate in freshwater, toxicant default guideline values for protecting aquatic ecosystems, technical brief

View Source
Preview of Nutrient limitation and interactions with organic matter and sediments within dryland streams of the Pilbara region of northwest - the UWA Profiles and Research Repository - The University of Western Australia, accessed July 21, 2025
Nutrient limitation and interactions with organic matter and sediments within dryland streams of the Pilbara region of northwest - the UWA Profiles and Research Repository - The University of Western Australia, accessed July 21, 2025
Contextual Support

Exploring the potential of metabarcoding to disentangle macroinvertebrate community dynamics in intermittent streams

View Source
Preview of Nutrient limitation of algae and macrophytes in streams: Integrating laboratory bioassays, field experiments, and field data - PubMed Central, accessed July 13, 2025,
Nutrient limitation of algae and macrophytes in streams: Integrating laboratory bioassays, field experiments, and field data - PubMed Central, accessed July 13, 2025,
Contextual Support Journal

Nutrient limitation of algae and macrophytes in streams: Integrating laboratory bioassays, field experiments, and field data - PubMed Central, accessed July 13, 2025,

View Source
Preview of Southeast Australia temperate savanna - Wikipedia, accessed August 4, 2025
Southeast Australia temperate savanna - Wikipedia, accessed August 4, 2025
Contextual Support GreyLiterature

Southeast Australia temperate savanna - Wikipedia

View Source
Preview of Surface Water - Aurukun Bauxite Project EIS - Glencore Australia, accessed August 2, 2025,
Surface Water - Aurukun Bauxite Project EIS - Glencore Australia, accessed August 2, 2025,
Contextual Support Journal

Surface Water - Aurukun Bauxite Project EIS - Glencore Australia, accessed July 13, 2025,

View Source
Preview of SURVEY OF NITRATES AND NITRITES IN FOOD AND BEVERAGES IN AUSTRALIA, accessed July 13, 2025,
SURVEY OF NITRATES AND NITRITES IN FOOD AND BEVERAGES IN AUSTRALIA, accessed July 13, 2025,
Contextual Support Journal

SURVEY OF NITRATES AND NITRITES IN FOOD AND BEVERAGES IN AUSTRALIA, accessed July 13, 2025,

View Source
Preview of The Challenger gold story — do it once, do it well, accessed July 13, 2025,
The Challenger gold story — do it once, do it well, accessed July 13, 2025,
Contextual Support Journal

The Challenger gold story — do it once, do it well, accessed July 13, 2025,

View Source
Preview of The impact of nitrate pollution in waterways on freshwater species, accessed August 8, 2025
The impact of nitrate pollution in waterways on freshwater species, accessed August 8, 2025
Contextual Support Journal

The impact of nitrate pollution in waterways on freshwater species, accessed July 24, 2025,

View Source
Preview of Threats - EPA SA, accessed July 16, 2025,
Threats - EPA SA, accessed July 16, 2025,
Contextual Support Government

Threats - EPA SA, accessed July 13, 2025,

View Source
Preview of Top 10 Biggest Infrastructure Projects in Australia - Mastt, accessed July 13, 2025,
Top 10 Biggest Infrastructure Projects in Australia - Mastt, accessed July 13, 2025,
Irrelevant

Top 10 Biggest Infrastructure Projects in Australia - Mastt, accessed July 13, 2025,

View Source
Preview of Total Nitrogen - DCCEEW, accessed August 8, 2025
Total Nitrogen - DCCEEW, accessed August 8, 2025
Contextual Support Government

Total Nitrogen - DCCEEW

View Source
Preview of Tropicana - OPERATIONAL PROFILE 2018, accessed July 13, 2025,
Tropicana - OPERATIONAL PROFILE 2018, accessed July 13, 2025,
Contextual Support Journal

Tropicana - OPERATIONAL PROFILE 2018, accessed July 13, 2025,

View Source
Preview of Understanding links between water-quality variables and nitrate concentration in freshwater streams using high frequency sensor data - PubMed Central, accessed August 11, 2025,
Understanding links between water-quality variables and nitrate concentration in freshwater streams using high frequency sensor data - PubMed Central, accessed August 11, 2025,
Contextual Support Journal

Understanding links between water-quality variables and nitrate concentration in freshwater streams using high frequency sensor data - PubMed Central, accessed July 13, 2025,

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 STEWARDSHIP - Leading Practice Sustainable ..., accessed July 24, 2025
WATER STEWARDSHIP - Leading Practice Sustainable ..., accessed July 24, 2025
Contextual Support Journal

(PDF) Water quality in two Australian dryland rivers: spatial and ..., accessed July 20, 2025

View Source
Preview of Water stewardship | Leading practice handbooks for sustainable mining, accessed July 24, 2025
Water stewardship | Leading practice handbooks for sustainable mining, accessed July 24, 2025
Contextual Support Government

Water stewardship | Leading practice handbooks for sustainable mining, accessed July 13, 2025,

View Source
Preview of www.frontiersin.org, accessed July 13, 2025, ).
www.frontiersin.org, accessed July 13, 2025, ).
Contextual Support Journal

www.frontiersin.org, accessed July 13, 2025, ).

View Source

Context

  • Region Australia
  • Biome Temperate Semi-Arid Shrublands & Open Woodlands
  • Land Use Industrial & Infrastructure Use
  • Assessment Not Stated
  • Evidence Type ReferenceCondition

Lifecycle

  • Status Active
  • Version 1
  • Effective From 2 Jun 2026

Notes

The benchmark is consistent with best-practice industrial water stewardship aiming to keep water quality at or near natural background levels. Concentrations above this value pose ecological risks. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.