{"accessLevel": "public", "bureauCode": ["020:00"], "contactPoint": {"fn": "Jacqueline Brooks", "hasEmail": "mailto:brooks.reneej@epa.gov"}, "description": "Stable Isotope Ratios of Nitrate from the National Aquatic Resource Survey 2023 and 2024.  We analyzed 163 samples with nitrate concentrations above 2 mg-N/L for oxygen and nitrogen isotopes of nitrate.  We also include the water stable isotope values for those same samples. Metadata and QA data are provided in the spreadsheet. ", "distribution": [{"downloadURL": "https://pasteur.epa.gov/uploads/10.23719/1532320/NRSA2324%20Nitrate%20Isotopes-ScienceHub.xlsx", "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "title": "NRSA2324 Nitrate Isotopes-ScienceHub.xlsx"}], "identifier": "https://doi.org/10.23719/1532320", "keyword": ["NARS (National Aquatic Resource Survey)", "national rivers and streams assessment (NRSA)", "nitrogen stable isotopes"], "license": "https://pasteur.epa.gov/license/sciencehub-license.html", "modified": "2025-06-02", "programCode": ["020:000"], "publisher": {"name": "U.S. EPA Office of Research and Development (ORD)", "subOrganizationOf": {"name": "U.S. Environmental Protection Agency", "subOrganizationOf": {"name": "U.S. Government"}}}, "references": null, "rights": null, "title": "NRSA2324 Nitrate Stable Isotope Ratios"}