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    • Water Stable Isotope data from NARS (NRSA and NLA)

    Metadata Updated: April 2, 2026

    Water stable isotope data measured on water chemistry samples collected as part of the National Aquatic Resource Surveys (NARS). One file is for the National Rivers and Streams Assessment (NRSA), and contains the data collected in 2008-2009, 2013-2014, and 2018-2019. A separate file contains NRSA 2023-2024 water isotope data. Another file is for the National Lakes Assessment (NLA) and contains the water isotope data, as well as evaporation to inflow and water residence time calculated from the water isotope data from samples collected in 2007, 2012, and 2017. More data about these sites can be obtained from the EPA NARS website: https://www.epa.gov/national-aquatic-resource-surveys/data-national-aquatic-resource-surveys.

    This dataset is associated with the following publication: Putman, A., P. Longley, M. McDonnell, J. Reddy, M. Katoski, O. Miller, and J. Brooks. Isotopic evaluation of the National Water Model reveals missing agricultural irrigation contributions to streamflow across the western United States. HYDROLOGY AND EARTH SYSTEM SCIENCES. EGS, 28(13): 2895–2918, (2024).

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

    Downloads & Resources

    References

    https://doi.org/10.5194/hess-28-2895-2024
    https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11457154

    Dates

    Metadata Created Date June 27, 2024
    Metadata Updated Date April 2, 2026

    Metadata Source

    Harvested from EPA ScienceHub

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date June 27, 2024
    Metadata Updated Date April 2, 2026
    Publisher U.S. Environmental Protection Agency
    Maintainer
    Identifier https://doi.org/10.23719/1531017
    Data Last Modified 2025-06-02
    Public Access Level public
    Bureau Code 020:00
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Harvest Object Id a4b38c6a-68de-4083-a5ef-7c17607c85de
    Harvest Source Id 04b59eaf-ae53-4066-93db-80f2ed0df446
    Harvest Source Title EPA ScienceHub
    License https://pasteur.epa.gov/license/sciencehub-license.html
    Program Code 020:000
    Publisher Hierarchy U.S. Government > U.S. Environmental Protection Agency
    Related Documents https://doi.org/10.5194/hess-28-2895-2024, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11457154
    Source Datajson Identifier True
    Source Hash 4835d5a3fe6284e8056996a90be921afb0f739ba5d5dd98d097eaee24313b4a7
    Source Schema Version 1.1

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