Point-Source Nutrient Loads to Streams of the Conterminous United States, 2012

Dates

Publication Date: 2019-04-04
Start Date: 2012-01-01
End Date: 2012-12-31

Citation

Skinner, K.D., and Wise, D., 2019, Point-Source Nutrient Loads to Streams of the Conterminous United States, 2012: U.S. Geological Survey data release, https://doi.org/10.5066/P9PYVPFT.

Summary

The U.S. Geological Survey (USGS) developed a spatial water-quality model called SPAtially Referenced Regressions On Watershed attributes (SPARROW) to estimate the major sources and environmental factors that affect the long-term supply, transport, and fate of contaminants in the Nation’s streams. The SPARROW model relates in-stream water-quality data to spatially referenced characteristics of watersheds, including contaminant sources and factors influencing terrestrial and aquatic transport. Based on SPARROW modeling, one of the main nutrient sources to streams is point-source facilities such as municipal waste-water treatment plants that discharge directly to streams. This dataset was developed to assist with SPARROW models developed [...]

Summary

The U.S. Geological Survey (USGS) developed a spatial water-quality model called SPAtially Referenced Regressions On Watershed attributes (SPARROW) to estimate the major sources and environmental factors that affect the long-term supply, transport, and fate of contaminants in the Nation’s streams. The SPARROW model relates in-stream water-quality data to spatially referenced characteristics of watersheds, including contaminant sources and factors influencing terrestrial and aquatic transport. Based on SPARROW modeling, one of the main nutrient sources to streams is point-source facilities such as municipal waste-water treatment plants that discharge directly to streams. This dataset was developed to assist with SPARROW models developed to assess supply, transport and fate of total nitrogen and phosphorous in streams of the conterminous United States (2012). This dataset documents discharge information from point sources in the conterminous United States and was obtained from the EPA Integrated Compliance Information System (ICIS) and Permit Compliance System (PCS). When available, nutrient concentrations were used to calculate point source loads. However, in many cases measured concentration data were not available in the ICIS or PCS data base and so “typical pollutant concentrations” (TPC’s) were developed using data from similar facilities. A new method for calculating TPC’s was implemented that allows varying amounts of nutrient concentration data and/or varying numbers of facilities to determine TPC’s. This dataset contains the EPA facility, flow, and concentration data and all updates to the data, along with the TPC tables and resultant total nitrogen and phosphorous loads calculated from the input datasets.

Contacts

Point of Contact :: Kenneth D Skinner, Northwest Region
Process Contact :: Kenneth D Skinner, Daniel Wise
Originator :: Kenneth D Skinner, Daniel Wise
Metadata Contact :: Kenneth D Skinner, Northwest Region
Publisher :: U.S. Geological Survey
SDC Data Owner :: Idaho Water Science Center
USGS Mission Area :: Water Resources
Distributor :: U.S. Geological Survey - ScienceBase

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Point-Source_Nutrient_Loads_to_Streams_of_the_Conterminous_United_States_2012.xml Original FGDC Metadata	View	163.98 KB	application/fgdc+xml
DMR.csv		3.17 MB	text/csv
Facilities.csv		1.96 MB	text/csv
Flow.csv		9.19 MB	text/csv
National_Medians.csv		14.72 KB	text/csv
Rubin_TPC.csv		17.12 KB	text/csv
sic_codes.csv		39.98 KB	text/csv
State_Expansion.csv		11.14 KB	text/csv
flowsic.csv		172.09 KB	text/csv
flowsicsea.csv		682.52 KB	text/csv
load_summary_by_discharger.csv		910.67 KB	text/csv
load_summary_by12Month.csv		17.29 MB	text/csv
load_summary_byMonth_lt34.csv		845.7 KB	text/csv
load_summary_bySeason.csv		1.11 MB	text/csv
pacific_hatcheries_production_2012_nawqa.csv		26.86 KB	text/csv
sic.csv		57.98 KB	text/csv
PntSrc_SPARROW.jpg		464.1 KB	image/jpeg

Related External Resources

Type: Citation

Skinner, K.D., and Maupin, M.A., 2019, Point-source nutrient loads to streams of the conterminous United States, 2012: U.S. Geological Survey Data Series 1101, 13 p., https://doi.org/10.3133/ds1101.	https://doi.org/10.3133/ds1101

Type: Browse Image

Major point-source facilities and minor wastewater treatment facilities in the conterminous United States and SPARROW regions.	https://www.sciencebase.gov/catalog/file/get/5ba54362e4b08583a5c9d4e5?f=__disk__ee%2F46%2F80%2Fee4680723e2b0d4283616e6cc1f8b976b764b5b1&allowOpen=true

Purpose

The datasets were used to estimate total phosphorous and total nitrogen loads for all major point-source facilities and minor waste-water treatment facilities discharging to streams in the conterminous United States during 2012. The point-source datasets will be used as nutrient inputs to regional SPARROW models representing 2012 conditions.

Point-Source Nutrient Loads to Streams of the Conterminous United States, 2012

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