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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Mahler, B.J., Van Metre, P.C., Burley, T.E., Loftin, K.A., Meyer M.T., and Nowell, L.H., 2016, Similarities and differences in occurrence and temporal fluctuations in glyphosate and atrazine in small Midwestern (USA) streams during the 2013 growing season: Sci. Total Environ., in press, Available Online

Graham, J.L., Dubrovsky, N.M., Eberts, S.M., 2016, Cyanobacterial Harmful Algal Blooms and: U.S. Geological Survey Open-File Report 2016-1174, 12 p.  DOI: 10.3133/ofr20161174 Available Online

Lee, C.J., Hirsch, R.M., Schwarz, G.E., Holtschlag, D.J., Preston, S.D., Crawford, C.G., Vecchia, A.V., 2016, An evaluation of methods for estimating decadal stream loads: Journal of Hydrology, in press,   Available Online

Kronholm, S.C., Capel, P.D., and Terziotti, S., 2016, Statistically extracted fundamental watershed variables for estimating the loads of total nitrogen in small streams: Environmental Modeling and Assessment,   DOI: 10.1007/s10666-016-9525-3 Available Online

Burns, D.A., Miller, M.A., Pellerin, B.A., and Capel, P.D., 2016, Patterns of diel variation in nitrate concentrations in the Potomac River: Freshwater Science, 35(4),   doi: 10.1086/688777 Available Online

Ayotte, J.D., Nolan, B.T., Gronberg, J.A., 2016, Predicting Arsenic in Drinking Water Wells of the Central Valley, California: Environmental Science & Technology, 50 (14), p. 7555-7563.  DOI: 10.1021/acs.est.6b01914 Available Online

Bradley, P.M., Journey, C.A., Button, D.T., Carlisle, D.M., Clark, J.M., Mahler, B.J., Nakagaki, N., Qi, S.L., Waite, I.R., and Van Metre, P.C., 2016, Metformin and other pharmaceuticals widespread in wadeable streams of the southeastern United States: Environ. Sci. and Technol. Letters, v. 3, p. 243-249.  Available Online

Loftin, K.A., Clark, J.M., Journey, C.A., Kolpin, D.W., Van Metre, P.C., Carlisle, D.M., Bradley, P.M., 2016, Spatial and Temporal Variation in Microcystins Occurrence in Wadeable Streams in the Southeastern United States: Environmental Toxicology and Chemistry, vol. 35 (9), p. 2281-2287.  Available Online

Shoda, M.E., Stone, W.W., and Nowell, L.H., 2016, Prediction of pesticide toxicity in Midwest Streams: Journal of Environ. Qual., in press,   doi: 10.2134/jeq2015.12.0624

Gellis, A.C., Fuller, C.C., and Van Metre, P.C., 2016, Sources and ages of fine-grained sediment to streams using fallout radionuclides in the Midwestern United States: Journal of Environmental Management: in press,   10.1016/j.jenvman.2016.06.018 Available Online

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