National Water-Quality Assessment (NAWQA) Program

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The National Water-Quality Assessment (NAWQA) Program has produced more than 1,500 reports (complete bibliography) describing how water quality conditions vary locally, regionally, and nationally; whether conditions are getting better or worse over time; and how natural features and human activities affect these conditions. Conditions also were compared to national water-quality standards, guidelines, and benchmarks to assess the potential effects on drinking water and aquatic life. Most of these reports can be accessed on-line through the topical and geographical searches listed below.


Quick Links
to selected NAWQA reports:

General Interest Reports - summaries of relevant scientific information in a form designed for general and scientific audiences.

Fact Sheets - 2-6 page summaries of selected topics or report highlights

National NAWQA Publications

NAWQA publications by state:

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Recently Added:

Essaid, H.I., McCarthy, K.A., and Baker, N.T., 2016, Contrasting Nitrogen Fate in Watersheds Using Agricultural and Water Quality Information: Journal of Environmental Quality,   doi: 10.2134/jeq2016.02.0071 Available Online

Nilles, M.A., Penoyer, P.E., Ludtke, A.S., and Ellsworth, A.C., 2016, The Water-Quality Partnership for national parks-U.S. Geological Survey and National Park Service, 1998-2016: U.S. Geological Survey Fact Sheet 2016-3041, 6 p.  doi:10.3133/fs20163041 Available Online

Belitz, Kenneth, Jurgens, B.C., Johnson, T.D., 2016, Potential corrosivity of untreated groundwater in the United States: U.S. Geological Survey Scientific Investigations Report 2016-5092, 16 p.  10.3133/sir20165092 Available Online

Wetherbee, G.A., and Martin, RoseAnn, 2016, External quality assurance project report for the National Atmospheric Deposition Program's National Trends Network and Mercury Deposition Network, 2013-14: U.S. Geological Survey Scientific Investigations Report 2016-5069, 22 p.  DOI: 10.3133/sir20165069 Available Online

Arnold, T.L., DeSimone, L.A., Bexfield, L.M., Lindsey, B.D., Barlow, J.R., Kulongoski, J.T., Musgrove, MaryLynn, Kingsbury, J.A., and Belitz, Kenneth, 2016, Groundwater quality data from the National Water-Quality Assessment Project, May 2012 through December 2013: U.S. Geological Survey Data Series 997, 56 p.  DOI: 10.3133/ds997 Available Online

Van Metre, P.C., Frey, J.W., Musgrove, M., Nakagaki, N., Qi, S., Mahler, B.J., Wieczorek, M.E., and Button, D.T., 2016, High Nitrate Concentrations in Some Midwest United States Streams in 2013 after the 2012 Drought: J. Environ. Qual. 0,   10.2134/jeq2015.12.0591 Available Online

Merten, G.H., Welch, H.L., and Tomer, M.D., 2016, Effects of hydrology, watershed size, and agricultural practices on sediment yields in two river basins in Iowa and Mississippi: Journal of Soil and Water Conservation, 71(3), p. 267-278.  10.2489/jswc.71.3.267 Available Online

Ator, S.W. and Garcia, A.M., 2016, Application of SPARROW Modeling to Understanding Contaminant Fate and Transport from Uplands to Streams: JAWRA Journal of the American Water Resources Association, 52(3), p. 685-704.  10.1111/1752-1688.12419 Available Online

McCabe, G.J., Wolock, D.M., and Austin, S.H. , 2016, Variability of runoff-based drought conditions in the conterminous United States: International Journal of Climatology,   DOI: 10.1002/joc.4756 Available Online

Wetherbee, G.A., and Mast, M.A., 2016, Annual variations in wet-deposition chemistry related to changes in climate: Climate Dynamics, p. 1-15.  DOI: 10.1007/s00382-016-3017-7 Available Online

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