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


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LaMotte, A.E., 2018, Estimated nitrogen from septic for the conterminous United States, 2010 (SepN_CONUS_bg_2010): U.S. Geological Survey data release,


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 [...]


Point of Contact :
Andrew E LaMotte
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Maryland-Delaware-D.C. Water Science Center
USGS Mission Area :
Water Resources

Attached Files

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811.01 MB application/zip


This dataset was created by the U.S. Geological Survey (USGS) National Water-Quality Assessment (NAWQA) Project in support of USGS SPARROW modeling (SPAtially Referenced Regressions On Watershed attributes). The dataset also can be useful for other applications such as regional and (or) national watershed characterizations and modeling.



  • USGS Data Release Products
  • USGS Maryland, Delaware, and the District of Columbia Water Science Center



Additional Information


Type Scheme Key
doi doi:10.5066/P9QTGSI7

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