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USGS National Water Quality Assessment Data Warehouse

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Map Site Locations and Chemical Concentrations on USGS Maps

The NAWQA Mapping application is not available at this time. Please visit these other resources to access NAWQA data:

Download USGS NAWQA data
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Download both USGS and EPA water-quality data

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U.S. Department of the Interior 1849 C Street, N.W.
Washington, DC 20240
202-208-3100
| U.S. Geological Survey Box 25286
Denver, CO 8022

URL: http://water.usgs.gov/nawqa/data

Page Contact Information: gs.nawqa.data@usgs.gov

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