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


National NAWQA Publications

NAWQA publications by state:

Image Map - U.S. Map

Recently Added:

Risch, M.R., DeWild, J.F., Gay, D.A., Zhang, L., Boyer, E.W., Krabbenhoft, D.P., 2017, Atmospheric mercury deposition to forests in the eastern USA : Environmental Pollution, Volume 228, p. 8-18.  https://doi.org/10.1016/j.envpol.2017.05.004 Available Online

Brakebill, J.W. and Gronberg, J.M., 2017, County-Level Estimates of Nitrogen and Phosphorus from Commercial Fertilizer for the Conterminous United States, 1987-2012: U.S. Geological Survey data release,   10.5066/F7H41PKX Available Online

Gronberg, J.M., and Arnold, T.L., 2017, County-level estimates of nitrogen and phosphorus from animal manure for the conterminous United States, 2007 and 2012: U.S. Geological Survey Open-File Report 2017-1021, 6 p.  10.3133/ofr20171021 Available Online

Falcone, J.A., 2017, Conterminous U.S. mapping of household income at the block group scale adjusted for cost-of-living for the period 2013-2014: U.S. Geological Survey data release,   Available Online

Falcone, J.A., 2017, Old vs. new urban: U.S. national mapping of the year of "first development" for urban areas, from 1940-2010: U.S. Geological Survey data release,   Available Online

Falcone, J.A., 2017, Coefficient-based consistent mapping of imperviousness in the conterminous U.S. at 60-m resolution for 1974, 1982, 1992, 2002, and 2012: U.S. Geological Survey data release,   Available Online

Falcone, J.A., Baker, N.T., Price, C.V., 2017, Watershed boundaries for study sites of the U.S. Geological Survey Surface Water Trends project: U.S. Geological Survey data release,   Available Online

Farmer, W.H., Murphy, J.C., Riskin, M.L., Ryberg, K.R., and Zuellig, R.E., 2017, Daily streamflow datasets used to analyze trends in streamflow at sites also analyzed for trends in water quality and ecological condition in the Nation's rivers and streams: U.S. Geological Survey data release,   Available Online

Mills, T.J., Sprague, L.A., Murphy, J.C., Riskin, M.L., Falcone, J.A., Stets, E.G., Oelsner, G.P, and Johnson, H.M., 2017, Water-quality and streamflow datasets used in Seasonal Kendall trend tests for the Nation's rivers and streams, 1972-2012: U.S. Geological Survey data release,   Available Online

Zuellig, R.E. and Riskin, M.L., 2017, Ecological community datasets used to evaluate the presence of trends in ecological communities in selected rivers and streams across the United States, 1992-2012: U.S. Geological Survey data release,   Available Online

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