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    • The StreamCat Dataset: Accumulated Attributes for NHDPlusV2 (Version 2.1) Catchments for the Conterminous United States: Nitrogen Surplus Density

    Metadata Updated: December 2, 2025

    This dataset represents the density of nitrogen surplus as kg N / yr, excluding biological N Fixation, within individual, local NHDPlusV2 catchments and upstream, contributing watersheds.

    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=5d7e2a7a-d7ef-40d2-99b9-101b2af9d8b6

    Dates

    Metadata Created Date October 3, 2023
    Metadata Updated Date December 2, 2025
    Data Update Frequency R/P3Y

    Metadata Source

    Harvested from StreamCat Harvest

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date October 3, 2023
    Metadata Updated Date December 2, 2025
    Publisher U.S. Environmental Protection Agency, Office of Water,
    Maintainer
    Identifier 5d7e2a7a-d7ef-40d2-99b9-101b2af9d8b6
    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/Public/OW/metadata/StreamCat.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 5cd2380c-8c24-4a16-b148-b3c9f63c1b0b
    Harvest Source Id e7d3a7e2-50b8-4149-949c-cf56c38224b3
    Harvest Source Title StreamCat Harvest
    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=5d7e2a7a-d7ef-40d2-99b9-101b2af9d8b6
    Source Datajson Identifier True
    Source Hash 3f611136d0655f3da6dd0bf1823254566f0f0afd25b512f65a44e3c6c41f65cc
    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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