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Population with On-Site Wastewater Treatment within the Pacific Drainages of the United States, 2010


Publication Date
Time Period


Wise, D.R., 2019, Population with On-Site Wastewater Treatment within the Pacific Drainages of the United States, 2010: U.S. Geological Survey data release,


The U.S. Geological Survey (USGS) is developing SPARROW models (SPAtially Related Regressions On Watershed Attributes) to assess the transport of contaminants (e.g., nutrients) through the Pacific drainages of the United States (the Columbia River basin; the coastal drainages of Washington, Oregon, and California; the Klamath River basin; the Central Valley of California, and the west slopes of the Sierra Nevada Mountains). SPARROW relates instream water quality measurements to spatially referenced characteristics of watersheds, including contaminant sources and the factors influencing terrestrial and aquatic transport. The number of people with on-site wastewater treatment (primarily septic tanks) is a potential factor affecting nutrient [...]


Point of Contact :
Daniel Wise
Originator :
Daniel Wise
Metadata Contact :
Daniel Wise
Publisher :
U.S. Geological Survey
SDC Data Owner :
Oregon Water Science Center
USGS Mission Area :
Water Resources
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

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pac_ns_pop.7z 7.94 MB
Original FGDC Metadata

14.81 KB


The purpose of this data set is to provide water-quality and land management analysts with a tool for assessing the importance of on-site wastewater treatment in the Pacific drainages of the United States. An existing data set of populations within the Pacific drainages with on-site wastewater treatment (Wise and Johnson, 2013) is inadequate because it represented 2002 conditions and, more importantly, did not include the Klamath River Basin in Oregon or any of the watersheds in California. The new dataset representing number of people with on-site wastewater treatment in 2010 could be useful in watershed modeling, as well as other types of water-quality and land management analyses in the western United States. Wise, D.R., and Johnson, H.M., 2013, Application of the SPARROW model to assess surface-water nutrient conditions and sources in the United States Pacific Northwest: U.S. Geological Survey Scientific Investigations Report 2013–5103, 32 p.,



  • USGS Data Release Products



Additional Information


Type Scheme Key
DOI doi:10.5066/P979BBCQ

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