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:

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Anning, D.W. and Ator, S.W., 2017, Generalized lithology for the conterminous United States: U.S. Geological Survey data release,   DOI: 10.5066/F7R78D4N Available Online

Waite, I.R., Van Metre, P.C., 2017, Multistressor predictive models of invertebrate condition in the Corn Belt, USA: Freshwater Science, Available Online

Rose, C.E., Coupe, R.C., Capel, P.D., and Webb, R.M.T., 2017, Holistic assessment of occurrence and fate of metolachlor within environmental compartments of agricultural watersheds: Science of the Total Environment, v. 612, p. 708-719.  doi: 10.1016/j.scitotenv.2017.08.154 Available Online

Van Metre, P.C., Alvarez, D.A., Mahler, B.J., Nowell, L., Sandstrom, M., Moran, P., 2016, Complex Mixtures of Pesticides in Midwest U.S. Streams Indicated by POCIS Time-Integrating Samplers: Environmental Pollution, vol 220 (A), p. 431-440.  10.1016/j.envpol.2016.09.085 Available Online

Sheibley, R.W., Morace, J.L., Journey, C.A., Van Metre, P.C., Bell, A.H., Nakagaki, Naomi, Button, D.T., and Qi, S.L., 2017, Design and methods of the Pacific Northwest Stream Quality Assessment (PNSQA), 2015: U.S. Geological Survey Open-File Report 2017-1103, 46 p.  10.3133/ofr20171103 Available Online

Medalie, Laura, and Martin, J.D., 2017, Nutrient and pesticide contamination bias estimated from field blanks collected at surface-water sites in U.S. Geological Survey water-quality networks, 2002-12: U.S. Geological Survey Scientific Investigations Report 2016-5129, 40 p.  Available Online

Stets, E.G., Lee, C.J., Lytle, D.A., and Schock, M.R., 2017, Increasing chloride in rivers of the conterminous U.S. and linkages to potential corrosivity and lead action level exceedances in drinking water: Science of the Total Environment,   Available Online

Nowell, L.H., et al., 2017, Complex mixtures of dissolved pesticides show potential aquatic toxicity in a synoptic study of Midwestern U.S. streams: Sci Total Environ,   10.1016/j.scitotenv.2017.06.156 Available Online

Bradley, P.M., W.A. Battaglin, J.M. Clark, F.P. Henning, M.L. Hladik, L.R. Iwanowicz, C.A. Journey, J.W. Riley, and K.M. Romanok, 2017, Widespread Occurrence and Potential for Biodegradation of Bioactive Contaminants in Protected Wilderness of Congaree National Park, USA: Environmental Toxicology & Chemistry,   DOI: 10.1002/etc.3873 Available Online

Forrester, H., Clow, D., Roche, J., Heyvaert, A., and Battaglin, W., 2017, Effects of backpacker use, pack stock trail use, and pack stock grazing on water-quality indicators, including nutrients, E. coli, hormones, and pharmaceuticals, in Yosemite National Park, USA: Environmental Management, p. 1-18.  doi: 10.1007/s00267-017-0899-z Available Online

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