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    • The StreamCat Dataset: Accumulated Attributes for NHDPlusV2 (Version 2.1) Catchments for the Conterminous United States: Surface Water Nitrogen Flux

    Metadata Updated: February 10, 2026

    This dataset represents estimated surface water TN flux within individual, local NHDPlusV2 catchments and upstream, contributing watersheds. Measured as kg N/km2.

    Access & Use Information

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

    Downloads & Resources

    References

    https://www.epa.gov/national-aquatic-resource-surveys/streamcat-dataset#access-streamcat-data
    https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=956964c5-b117-49b7-b469-35b90d95574a

    Dates

    Metadata Created Date January 30, 2026
    Metadata Updated Date February 10, 2026
    Data Update Frequency R/P3Y

    Metadata Source

    Harvested from EPA Non Geo Repository

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 30, 2026
    Metadata Updated Date February 10, 2026
    Publisher U.S. Environmental Protection Agency, Office of Water,
    Maintainer
    Identifier 956964c5-b117-49b7-b469-35b90d95574a
    Data First Published 2015-04-23
    Language en-US
    Data Last Modified 2023-11-13
    Rights public (Data asset is or could be made publicly available to all without restrictions)
    Category environment
    Public Access Level public
    Data Update Frequency R/P3Y
    Bureau Code 020:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://edg.epa.gov/data/nongeo_data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Data Quality True
    Data Dictionary https://www.epa.gov/national-aquatic-resource-surveys/streamcat-metrics-and-definitions
    Data Dictionary Type text/html
    Harvest Object Id fa77ba90-bba0-43f4-b87d-ea573cc226f4
    Harvest Source Id 9c1c2b5b-7925-4ca2-a663-ca2131653db1
    Harvest Source Title EPA Non Geo Repository
    Homepage URL https://www.epa.gov/national-aquatic-resource-surveys/streamcat-dataset
    License https://edg.epa.gov/EPA_Data_License.html
    Old Spatial -125.0,24.5,-66.5,49.5
    Program Code 020:072
    Related Documents https://www.epa.gov/national-aquatic-resource-surveys/streamcat-dataset#access-streamcat-data, https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=956964c5-b117-49b7-b469-35b90d95574a
    Source Datajson Identifier True
    Source Hash cd766c2a1009bb99de79ab95254c2f648c1f9a3cd489c54c3509278f2529998d
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -125.0, 24.5, -125.0, 49.5, -66.5, 49.5, -66.5, 24.5, -125.0, 24.5}
    Temporal 2015/2030

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