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    • Estimated nitrogen from septic for the conterminous United States, 2010 (SepN_CONUS_bg_2010)

    Metadata Updated: October 30, 2025

    This metadata record documents a rudimentary estimate of nitrogen from septic for the conterminous United States for 2010, derived from block-group 1990 and 2010 Decennial Census of Population and Housing data. Specifically, the data were computed from 1990 population and housing data where a ratio of the total population to the people on septic was obtained and applied to 2010 population data by block group. All input data were acquired from the National Historical Geographic Information System (NHGIS, Manson and others, 2017). The amount of nitrogen in pounds per person per year was derived from documentation supporting the Chesapeake Bay Program’s Phase 5.3 Community Watershed Model (USEPA, 2010). The Supplemental Information element in this metadata record contains more detailed accounting of methods, sources, and limitations.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date September 13, 2025
    Metadata Updated Date October 30, 2025

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date September 13, 2025
    Metadata Updated Date October 30, 2025
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/usgs-5b3a9a3be4b040769c181d80
    Data Last Modified 2020-08-21T00:00:00Z
    Category geospatial
    Public Access Level public
    Bureau Code 010:12
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://ddi.doi.gov/usgs-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
    Harvest Object Id 0ec4c7ca-5bc0-42e2-893e-4eeccb621f31
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial -127.8873, 22.8720, -65.3455, 51.5754
    Source Datajson Identifier True
    Source Hash e0a5a7f7d609d72cb1d82a1da6b239f482a25e5e9a76c8f89f9251e2669b57e2
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -127.8873, 22.8720, -127.8873, 51.5754, -65.3455, 51.5754, -65.3455, 22.8720, -127.8873, 22.8720}

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