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Scientific Investigations Report 2013–5103


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Application of the SPARROW Model to Assess Surface-Water Nutrient Conditions and Sources in the United States Pacific Northwest

Table 2. Sources of water-quality data used to estimate total nitrogen and total phosphorus calibration stream loads for the National Hydrography Dataset SPARROW models developed for the United States Pacific Northwest.

Level Agency Number
of stations
Federal U.S. Geological Survey 84
  Bureau of Reclamation 12
State Oregon Department of Environmental Quality 58
  Washington Department of Ecology 55
Local King County, Washington 9
  Clean Water Services, Oregon 4
Total   222
Location Number
of stations
Washington 84
Oregon 74
Idaho 51
Montana 9
Wyoming 4
Total 222

First posted July 17, 2013

For additional information contact:
Director, Oregon Water Science Center
U.S. Geological Survey
2130 SW 5th Avenue
Portland, Oregon 97201
http://or.water.usgs.gov

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