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
A value from the lower end of the observed performance range of the Oaklands Park system is selected to set a high standard that is nevertheless demonstrably achievable. A median outlet concentration of 0.02 mg/L as NO3−N was observed, but values as low as 0.01 mg/L were common. Converting 0.01 mg/L as N gives 0.044 mg/L as NO3. To provide a round, practical, yet aspirational target, a benchmark of 0.05 mg/L as NO3 is proposed.
Water Nitrate concentration in urban stormwater discharge
This benchmark represents the highest achievable water quality for nitrate in urban stormwater discharge under best-practice management in the Temperate Semi-Arid Shrublands & Open Woodlands biome.
Grounded in measured data from a real-world, best-practice system in the target region.
Sources (4)
Green Adelaide, Hills & Fleurieu Regional Summary 2021 Aquatic ..., accessed July 13, 2025,
View SourceGreen Adelaide, Hills & Fleurieu Regional Summary 2023 Aquatic Ecosystem Condition Report | EPA, accessed July 13, 2025,
View SourceComprehensive Assessment of Water Sensitive Urban Design Practices based on Multi-criteria Decision Analysis via a Case Study of the University of Melbourne, Australia - MDPI, accessed July 13, 2025,
View SourceToxicant default guideline values for aquatic ecosystem protection ...
View SourceSupporting Sources (47)
Additional references from the underlying research that informed this benchmark.
(PDF) Eutrophication in Australian Rivers, Reservoirs and Estuaries – A Southern Hemisphere Perspective on the Science and its Implications - ResearchGate, accessed July 13, 2025,
View Source(PDF) Mineral Nutrition of Plants in Australia's Arid Zone - ResearchGate
View SourceNamoi River Water Quality Objectives explained - NSW Government
View SourceA Nutrient Dynamics Model for Australian Waterways: Land use, catchment biogeochemistry and water quality in Australian rivers, lakes and estuaries - ResearchGate, accessed July 13, 2025,
View SourceA Review of Pollutant Concentrations in Urban Stormwater Across Eastern Australia, After 20 Years - Frontiers, accessed July 13, 2025,
View SourceAnalysing water sensitive urban design options - Australian Water Association, accessed July 13, 2025,
View SourceAnalysing water sensitive urban design options, accessed July 26, 2025
View SourceAUSTRALIA'S WATER SENSITIVE URBAN DESIGN - ResearchGate, accessed July 13, 2025,
View SourceRoot Structure and Functioning for Efficient Acquisition of Phosphorus: Matching Morphological and Physiological Traits
View SourceBodkin Park Living Stream - City of South Perth, accessed July 13, 2025,
View SourceReport Card 2022-23 - EPA Victoria
View SourceComposition of nitrogen in urban residential stormwater runoff: Concentrations, loads, and source characterization of nitrate and organic nitrogen - PMC - PubMed Central, accessed July 13, 2025,
View SourceANZECC (2000) Australian and New Zealand Guidelines for Fresh and Marine Water Quality.
View SourceWater Quality Guidelines Home - Water Quality Australia
View SourceTargets for Urban Stormwater Management in Australia - MDPI, accessed July 13, 2025
View Source(PDF) Grassland soil carbon and nitrogen stocks under temperate ..., accessed August 4, 2025,
View SourceArid Landscapes: Assessment of Street Tree Performance at Roxby ..., accessed July 21, 2025
View SourceGC230228 - General Council Meeting - 28 February 2023 - AWS, accessed July 13, 2025,
View SourceGreat Western Woodlands - Wikipedia, accessed July 12, 2025,
View SourceHurlingham Living Stream - City of South Perth, accessed July 13, 2025,
View SourceLiving Streams - SERCUL, accessed July 13, 2025,
View SourceMay 31, 2019 Chad Loflen Senior Environmental Scientist Regional Water Quality Control Board, San Diego 2375 Northside Drive, Su, accessed July 13, 2025,
View SourceHickey, C. (2002). Nitrate guideline values in ANZECC 2000. Memorandum MFE02237 prepared for Ministry for the Environment (New Zealand). NIWA Client Report: HAM2002-126.
View SourceNitrate & Nitrite - Water Quality Parameter Overview and Products - Hach Australia, accessed July 13, 2025,
View SourceNitrate guidelines values in ANZECC 2000 - Ministry for the Environment, accessed August 1, 2025
View SourceNitrate - Water Quality Australia, accessed August 1, 2025
View SourceNitrate Toxicity to Aquatic Animals: A Review With New Data for Freshwater Invertebrates, accessed July 13, 2025,
View SourceNitrogen composition in urban runoff—implications for stormwater management | Request PDF - ResearchGate, accessed July 13, 2025,
View SourceNVIS Fact sheet MVG 19 – Tussock grasslands, accessed August 28, 2025
View SourceNVIS Fact sheet MVG 17 – Other shrublands - DCCEEW, accessed July 13, 2025
View Sourcei Design performance evaluation of Oaklands Park wetland ... - FLEX, accessed July 13, 2025,
View SourceReference Ecosystem Condition-Based Syntaxonomic Study for Ecological Restoration and Protection of Temperate Forests in South Korea - MDPI, accessed July 13, 2025,
View SourceREGIME SHIFTS, RESILIENCE, AND BIODIVERSITY IN ECOSYSTEM MANAGEMENT Carl Folke,1,2 Steve Carpenter,2,3 Brian Walker,4 Marten Sch, accessed July 13, 2025,
View SourceSimultaneous exposure to nitrate and low pH reduces the blood oxygen-carrying capacity and functional performance of a freshwater fish - PMC, accessed July 13, 2025,
View SourceSoutheast Australia temperate savanna - Wikipedia
View SourceSpatial and temporal variation in the ecological stoichiometry of aquatic organisms in an urban catchment, accessed July 13, 2025,
View SourceStormwater Management Manual - Observatori de l'Aigua, accessed July 13, 2025,
View SourceThe Phosphorus Buffering Index – What Does it Mean for Your Soil? - Summit Fertilizers, accessed July 17, 2025,
View SourceToxicant default guideline values for aquatic ecosystem protection ...
View SourceThe influence of concrete on the geochemical qualities of urban streams - CSIRO PUBLISHING | Marine and Freshwater Research, accessed July 13, 2025,
View SourceThe impact of nitrate pollution in waterways on freshwater species, accessed July 31, 2025,
View SourceU.S. Geological Survey Circular 1225, accessed July 13, 2025,
View SourceUntitled - DBCA Library, accessed July 13, 2025,
View SourceUrban stormwater characterisation and nitrogen composition from lot-scale catchments — New management implications, accessed July 13, 2025,
View SourceUsing monitoring data to derive and assess against guideline values, accessed July 13, 2025,
View SourceVolumes of inputs, their concentrations and loads received by Adelaide metropolitan coastal waters Final Technical Report for ACWS Task IS 1 - epa.sa.gov.a, accessed July 13, 2025,
View SourceWater Quality Control Options in Response to Catchment ... - MDPI, accessed July 13, 2025,
View Source