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South Dakota Water Science Center

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USGS Water Science Centers are located in each state.

There is a USGS Water Science Center office in each State. Washington Oregon California Idaho Nevada Montana Wyoming Utah Colorado Arizona New Mexico North Dakota South Dakota Nebraska Kansas Oklahoma Texas Minnesota Iowa Missouri Arkansas Louisiana Wisconsin Illinois Mississippi Michigan Indiana Ohio Kentucky Tennessee Alabama Pennsylvania West Virginia Georgia Florida Caribbean Alaska Hawaii New York Vermont New Hampshire Maine Massachusetts South Carolina North Carolina Rhode Island Virginia Connecticut New Jersey Maryland-Delaware-D.C.

National Stream Quality Accounting Network (NASQAN)

Project Period: 2002-present
Project Chief: Kathy Neitzert

Executive Summary

The National Stream Quality Accounting Network (NASQAN) program of the U.S. Geological Survey provides ongoing characterization of the concentrations and flux of sediment and chemicals in the Nation's largest rivers. The NASQAN program began in 1974, and the original network consisted of more than 500 stations sampled at monthly intervals. The only station in South Dakota currently sampled by the NASQAN program is the Missouri Riiver at Yankton (station 06467500). Water-quality data from this site are available on NWISWeb for samples collected from 1956 to present.


The objectives of the study are to provide long-term water-quality monitoring of the Missouri River at Yankton as part of a nationwide program. NASQAN project criteria are followed in collecting samples.


Photo of sampling
USGS technicians Dave Hernandez and Douglas Johnson use a water-quality sampler to collect water samples as part of the National Stream Quality Accounting Network (NASQAN) program.
Photo of boat
USGS hydrologic technician Nate Stevens at the Yankton NASQAN site. The instrument towed is an acoustic doppler profiler with a geographic positioning system on a floating equipment platform.

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