Water Nitrate — Benchmark Detail - Nature Index

Benchmark Value

No specific value — see range

Range: 0.01 to 1.65 mg/L

Optimal Range: 0.01 to 1.65

Direction: Lower is desirable ↓

Form: OptimalRange

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 4 benchmarks together — the OptimalRange form drives the primary score, while 3 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary MaximumOnly Guard MaximumOnly Guard OptimalRange Guard

Evidence & Context

The proposed optimal range for water nitrate is < 0.01 to 1.65 mg/L (as NO3−N).

Metric Definition:

Concentration range of nitrate (NO3−N) in water representing the optimal ecological health in semi-arid grazing landscapes.

Benchmark Definition:

The range of nitrate concentrations in water that reflects a healthy, functional, and nutrient-retentive ecosystem.

Justification:

This range synthesizes background natural levels and the upper 80th percentile reference condition, supported by multiple data sources.

Sources (1)

Preview of "Reference conditions and threshold values for nitrate-nitrogen in New Zealand groundwaters"

"Reference conditions and threshold values for nitrate-nitrogen in New Zealand groundwaters" Journal

National-scale estimates of reference conditions for nitrate in Australian groundwater

Supporting Sources (34)

Additional references from the underlying research that informed this benchmark.

Preview of 1.1.7.1 Ecological systems | Bioregional Assessments, accessed July 13, 2025,

1.1.7.1 Ecological systems | Bioregional Assessments, accessed July 13, 2025,

Contextual Support Government

NVIS Fact sheet MVG 19 – Tussock grasslands, accessed July 13, 2025

Preview of B.ERM.0108 - Wambiana: Grazing strategies and tools to improve profitability and land condition | Meat & Livestock Australia - MLA, accessed July 10, 2025,

B.ERM.0108 - Wambiana: Grazing strategies and tools to improve profitability and land condition | Meat & Livestock Australia - MLA, accessed July 10, 2025,

Contextual Support GreyLiterature

Wambiana : Grazing strategies and tools to improve profitability and ...

Preview of Brigalow Belt - Wikipedia, accessed July 10, 2025,

Brigalow Belt - Wikipedia, accessed July 10, 2025,

Contextual Support GreyLiterature

State Soils - Soil Science Australia

Preview of Can extension programs improve grazing management in rangelands: a case study in Australia's Great Barrier Reef catchments - CSIRO Publishing, accessed July 10, 2025,

Can extension programs improve grazing management in rangelands: a case study in Australia's Great Barrier Reef catchments - CSIRO Publishing, accessed July 10, 2025,

Contextual Support Journal

Can extension programs improve grazing management in rangelands: a case study in Australia's Great Barrier Reef catchments - CSIRO Publishing

Preview of Cattle and Australia's water supply - MAHB, accessed July 10, 2025,

Cattle and Australia's water supply - MAHB, accessed July 10, 2025,

Contextual Support GreyLiterature

Cattle and Australia's water supply - MAHB, accessed July 10, 2025,

Preview of Controls on species distribution and biogeochemical cycling in nitrate-contaminated groundwater and surface water, southeastern Australia - PubMed, accessed July 10, 2025,

Controls on species distribution and biogeochemical cycling in nitrate-contaminated groundwater and surface water, southeastern Australia - PubMed, accessed July 10, 2025,

Contextual Support Journal

Controls on species distribution and biogeochemical cycling in nitrate-contaminated groundwater and surface water, southeastern Australia - PubMed, accessed July 10, 2025,

Preview of Environmental Factors Affecting Australia's Livestock Industries - MLA, accessed August 8, 2025

Environmental Factors Affecting Australia's Livestock Industries - MLA, accessed August 8, 2025

Contextual Support Journal

Effects of Livestock Grazing on Wetlands: Literature Review - Waikato Regional Council

Preview of Establishing riverine nutrient criteria using individual taxa thresholds, accessed August 8, 2025

Establishing riverine nutrient criteria using individual taxa thresholds, accessed August 8, 2025

Direct Evidence Journal

Establishing riverine nutrient criteria using individual taxa thresholds - ResearchOnline@JCU, accessed July 25, 2025

Preview of Establishment of reference conditions and trigger values for chemical, physical and micro-biological indicators in New Zealand streams and rivers - Ministry for the Environment, accessed August 11, 2025,

Establishment of reference conditions and trigger values for chemical, physical and micro-biological indicators in New Zealand streams and rivers - Ministry for the Environment, accessed August 11, 2025,

Cross Reference Journal

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

Preview of final report - FutureBeef, accessed July 10, 2025,

final report - FutureBeef, accessed July 10, 2025,

Contextual Support Journal

final report - FutureBeef, accessed July 10, 2025,

Preview of Full article: Reference conditions and threshold values for nitrate-nitrogen in New Zealand groundwaters - Taylor & Francis Online

Full article: Reference conditions and threshold values for nitrate-nitrogen in New Zealand groundwaters - Taylor & Francis Online

Cross Reference

Environmental Condition Index (Econd) - Wentworth Group of Concerned Scientists, accessed July 23, 2025

Preview of Guidance document for assessing and managing water quality in temporary waters, accessed July 16, 2025,

Guidance document for assessing and managing water quality in temporary waters, accessed July 16, 2025,

Methodology Source Journal

Guidance document for assessing and managing water quality in temporary waters, accessed July 10, 2025,

Preview of Herbicides, pesticides and nutrients in the Tindall aquifer, Katherine ...

Herbicides, pesticides and nutrients in the Tindall aquifer, Katherine ...

Direct Evidence Journal

Herbicides, pesticides and nutrients in the Tindall aquifer, Katherine ..., accessed July 10, 2025,

Preview of Land management for graziers | Business Queensland, accessed August 8, 2025

Land management for graziers | Business Queensland, accessed August 8, 2025

Contextual Support Government

Managing Gully Erosion - NQ Dry Tropics

Preview of Landscape rehydration and regenerative agriculture improves soil health, accessed July 30, 2025,

Landscape rehydration and regenerative agriculture improves soil health, accessed July 30, 2025,

Contextual Support GreyLiterature

Soil Health and Regenerative Agriculture - Southern Queensland Landscapes, accessed July 27, 2025,

Preview of Livestock drinking water guidelines, accessed July 10, 2025,

Livestock drinking water guidelines, accessed July 10, 2025,

Regulatory Framework Journal

Livestock drinking water guidelines, accessed July 10, 2025,

Preview of Memorandum - Nitrate guideline values in ANZECC 2000, accessed August 8, 2025

Memorandum - Nitrate guideline values in ANZECC 2000, accessed August 8, 2025

Contextual Support Journal

Hickey, C. (2002). Nitrate guideline values in ANZECC 2000. Memorandum MFE02237 prepared for Ministry for the Environment (New Zealand). NIWA Client Report: HAM2002-126.

Preview of Microbial Biogeochemical Cycling of Nitrogen in Arid Ecosystems - PMC - PubMed Central, accessed July 10, 2025,

Microbial Biogeochemical Cycling of Nitrogen in Arid Ecosystems - PMC - PubMed Central, accessed July 10, 2025,

Contextual Support Journal

Soil nitrogen dynamics in natural forest ecosystem: a review - Frontiers, accessed July 30, 2025,

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

Regulatory Framework Government

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

Preview of Nitrate in drinking water - WA Health, accessed August 8, 2025

Nitrate in drinking water - WA Health, accessed August 8, 2025

Regulatory Framework Government

Nitrate in drinking water - WA Health, accessed July 26, 2025,

Preview of Nitrate leaching from temperate perennial pastures grazed by dairy cows in south-eastern Australia - ResearchGate, accessed August 8, 2025

Nitrate leaching from temperate perennial pastures grazed by dairy cows in south-eastern Australia - ResearchGate, accessed August 8, 2025

Contextual Support Journal

Nitrate leaching from temperate perennial pastures grazed by dairy cows in south-eastern Australia - ResearchGate

Preview of Nutrient loss and water quality under extensive grazing in the upper ...

Nutrient loss and water quality under extensive grazing in the upper ...

Contextual Support Journal

Evidence of Large-Scale Chronic Eutrophication in the Great Barrier Reef: Quantification of Chlorophyll a Thresholds for Sustaining Coral Reef Communities - PubMed Central, accessed July 18, 2025

Preview of NVIS Fact sheet MVG 13 – Acacia open woodlands - DCCEEW, accessed July 13, 2025,

NVIS Fact sheet MVG 13 – Acacia open woodlands - DCCEEW, accessed July 13, 2025,

Contextual Support Journal

Database - Resilience Alliance, accessed July 30, 2025,

Preview of Reference conditions and threshold values for nitrate-nitrogen in New Zealand groundwaters - PMC - PubMed Central, accessed July 26, 2025,

Reference conditions and threshold values for nitrate-nitrogen in New Zealand groundwaters - PMC - PubMed Central, accessed July 26, 2025,

Cross Reference Journal

Reference conditions and threshold values for nitrate-nitrogen in ..., accessed July 25, 2025

Preview of Regen Ag #9- Nurture the Water Cycle - Dirty Clean Food

Regen Ag #9- Nurture the Water Cycle - Dirty Clean Food

Contextual Support GreyLiterature

Water Quality Guidelines Level of protection, accessed July 10, 2025,

Preview of Regenerative agriculture in Australia: the changing face of farming - Frontiers, accessed August 4, 2025

Regenerative agriculture in Australia: the changing face of farming - Frontiers, accessed August 4, 2025

Contextual Support Journal

Regenerative agriculture is key to dry season preparation - Soils For Life, accessed July 23, 2025

Preview of Semi-arid woodlands (grassy sub-formation) | NSW Environment, Energy and Science, accessed July 12, 2025, )

Semi-arid woodlands (grassy sub-formation) | NSW Environment, Energy and Science, accessed July 12, 2025, )

Contextual Support Government

Temperate Grasslands - Greening Australia

Preview of Semi-arid woodlands (shrubby sub-formation) | NSW Environment, Energy and Science, accessed July 12, 2025, )

Semi-arid woodlands (shrubby sub-formation) | NSW Environment, Energy and Science, accessed July 12, 2025, )

Contextual Support Government

Semi-arid woodlands (grassy sub-formation) | NSW Environment, Energy and Science

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

Preview of TERN data assist government and industry-led sustainable grazing practices in Great Barrier Reef catchments - Terrestrial Ecosystem Research Network, accessed on June 5, 2025

TERN data assist government and industry-led sustainable grazing practices in Great Barrier Reef catchments - Terrestrial Ecosystem Research Network, accessed on June 5, 2025

Contextual Support Government

TERN data assist government and industry-led sustainable grazing practices in Great Barrier Reef catchments, accessed July 18, 2025

Preview of The Wambiana grazing trial | FutureBeef, accessed July 19, 2025,

The Wambiana grazing trial | FutureBeef, accessed July 19, 2025,

Direct Evidence Journal

Wambiana grazing trial - FutureBeef

Preview of Water availability - A physiological constraint on nitrate utilization in plants of Australian semi-arid mulga woodlands - UQ eSpace, accessed July 10, 2025,

Water availability - A physiological constraint on nitrate utilization in plants of Australian semi-arid mulga woodlands - UQ eSpace, accessed July 10, 2025,

Contextual Support Journal

Water availability - A physiological constraint on nitrate utilization in plants of Australian semi-arid mulga woodlands - UQ eSpace, accessed July 10, 2025,

Preview of Water quality and the grazing animal - PubMed, accessed July 30, 2025,

Water quality and the grazing animal - PubMed, accessed July 30, 2025,

Contextual Support Journal

Water quality and the grazing animal - PubMed, accessed July 30, 2025,

Preview of Woodlands - DCCEEW, accessed August 5, 2025,

Woodlands - DCCEEW, accessed August 5, 2025,

Contextual Support Government

Woodlands - DCCEEW, accessed August 4, 2025,

Context

Region Australia
Biome Temperate Semi-Arid Shrublands & Open Woodlands
Land Use Livestock Grazing & Pasture
Assessment Conservation Target
Vegetation Shrubland
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 2
Effective From 2 Jun 2026

Notes

Values within this range indicate high ecological health; values consistently exceeding 1.65 mg/L indicate degradation. The lower boundary is near detection limits, reflecting natural background.

Related Benchmarks

Other benchmarks in the AUS-TSW-LVG-WNI family.