Water Nitrate
Benchmark Value
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
Evidence & Context
Based on this logic, a reference value of < 0.7 mg/L as nitrate (NO3−) is proposed for streams draining best-practice agricultural cropping systems in this biome.
Water nitrate concentration in streams draining best-practice agricultural cropping systems
This benchmark represents the best available water nitrate concentration for streams in agricultural cropping systems managed with sustainable practices in the Temperate Grassy Woodlands & Plains biome of Australia.
It is derived by triangulating three lines of evidence due to a lack of direct field measurements for this specific land use: baseline from minimally disturbed catchments, best practice uplift, and ecological protection limits.
Sources (1)
(PDF) A review of sediment and nutrient concentration data from Australia for use in catchment water quality models - ResearchGate, accessed August 10, 2025,
View SourceSupporting Sources (31)
Additional references from the underlying research that informed this benchmark.
(PDF) Nutrients and Primary Production in the Flinders River - ResearchGate
View Source
Threshold Indicator Taxa ANalysis and change points (dots) for the ...
View SourceAssessment of the Decadal Impact of Wildfire on Water Quality in Forested Catchments
View SourceAustralian Journal of Soil Research - CSIRO Publishing, accessed July 28, 2025,
View Source
BioMetric: Vegetation condition benchmarks, short-term review, accessed August 12, 2025,
View Source
Report Card 2022-23 - EPA Victoria
View SourceCover crop selection and management to reduce nitrate leaching risk
View SourceCover Crops and Fertilization Alter Nitrogen Loss in Organic and Conventional Conservation Agriculture Systems - Frontiers, accessed on May 31, 2025
View SourceCover Crops Reduce Nitrate Leaching in Agroecosystems:A Global Meta-Analysis - PubMed
View Source
Long-term forest paired catchment studies: What do they tell us that landscape-level monitoring does not?
View SourceAustralian and New Zealand guidelines for fresh and marine water quality, accessed August 3, 2025
View SourceMurray–Darling Basin Plan - DCCEEW
View SourceToxicant default guideline values for aquatic ecosystem protection: Nitrate in freshwater - Water Quality Australia, accessed July 13, 2025,
View Source
Toxicant default guideline values for aquatic ecosystem protection ..., accessed August 1, 2025
View SourceToxicant default guideline values for aquatic ecosystem protection: Nitrate in freshwater - Water Quality Australia
View SourceNitrate Water Quality Guidelines, accessed August 11, 2025,
View SourceNITROGEN AND PHOSPHORUS CONCENTRATIONS IN FOREST STREAMS OF THE UNITED STATES1 - at Clark University
View Source
Nitrogen and phosphorus relationships to benthic algal biomass in temperate streams - SciSpace
View SourcePatterns and Drivers of Groundwater and Stream Nitrate Concentrations in Intensively Managed Agricultural Catchments - MDPI, accessed August 10, 2025,
View SourceProspects for summer cover crops in southern Australian semi-arid cropping systems
View SourceNCC: Regenerative Agriculture and Soil Health - Wet Tropics Plan, accessed July 27, 2025,
View SourceProtecting farm waterways | Dairy News Australia
View SourceThe impact of nitrate pollution in waterways on freshwater species, accessed July 31, 2025,
View SourceDrivers of water quality in Afromontane-savanna rivers - Frontiers
View Source
Water quality | Murray–Darling Basin Authority, accessed July 25, 2025
View SourceWater quality assessment for sustainable agriculture in the Wet Tropics: a community-assisted approach - ResearchOnline@JCU
View SourceAustralian and New Zealand Guidelines for Fresh and Marine Water Quality (2000)
View SourceWater quality objectives for the Darwin Harbour Region, accessed July 25, 2025,
View SourceWet year causes low quantities of nitrate under derogation farms - RIVM
View SourceWhen do cover crops reduce nitrate leaching? A global meta‐analysis - PubMed Central
View SourceWinter Nitrate Leaching under Different Tillage and Winter Cover Crop Management Practices | Request PDF - ResearchGate
View Source