National Water-Quality Assessment (NAWQA) Project

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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

SPARROW modeling publications

National NAWQA Publications

NAWQA publications by state:

Image Map - U.S. Map

Recently Added:

Wieczorek, M.E., Jackson, S.E., and Schwarz, G.E., 2018, Select Attributes for NHDPlus Version 2.1 Reach Catchments and Modified Network Routed Upstream Watersheds for the Conterminous United States: U.S. Geological Survey data release,   doi: 10.5066/F7765D7 Available Online

Schwarz, G.E., and Wieczorek, M., 2018, Database of modified routing for NHDPlus version 2.1 flowlines: ENHDPlusV2_us: U.S. Geological Survey data release,   doi: 10.5066/P9PA63SM Available Online

Miller, M.P., Carlisle, D.M., Wolock, D.M, Wieczorek, M., 2018, A Database of Natural Monthly Streamflow Estimates from 1950 to 2015 for the Conterminous United States: Journal of the American Water Resources Association,   doi: 10.1111/1752-1688.12685 Available Online

Konrad, C., and Gellis, A., 2018, Factors Influencing Fine Sediment on Stream Beds in the Midwestern United States: Journal of Environmental Quality, p. 1214-1222.  doi:10.2134/jeq2018.02.0060 Available Online

Christensen, V.G., and Labounty, A.E., 2018, A History of Trade Routes and Water-Level Regulation on Waterways in Voyageurs National Park, Minnesota, USA: World Environmental and Water Resources Congress 2018, p. 125-135.  doi: 10.1061/9780784481394.014 Available Online

Christensen, V.G., Make, R.P., LeDuc J.F., 2018, Voyageurs National Park: Water-Level Regulation and Effects on Water Quality and Aquatic Biology: World Environmental and Water Resources Congress 2018, p. 185-194.  doi: 10.1061/9780784481394.017 Available Online

Michel, R.L., Jurgens, B.C., and Young, M.B, 2018, Tritium deposition in precipitation in the United States, 1953-2012: U.S. Geological Survey Scientific Investigations Report 2018-5086, 11 p.  doi: 10.3133/sir20185086 Available Online

Belitz, K., Watson, E., Johnson, T.D., Sharpe, J., 2018, Secondary Hydrogeologic Regions of the Conterminous United States: Ground Water,   doi: 10.1111/gwat.12806 Available Online

Tesoriero, A.J., Terziotti, S., Abrams, J.D., 2015, Predicting Redox Conditions in Groundwater at a Regional Scale: Environmental Science and Technology, 7 p.  doi/10.1021/acs.est.5b01869 Available Online

Tesoriero, A.J. , Gronberg, J.A., Juckem, P.F., Miller, M.P., Austin, B.P., 2017, Predicting redox-sensitive contaminant concentrations in groundwater using random forest classification: Water Resources Research, 53 p.  doi:10.1002/2016WR020197 Available Online

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