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National Water-Quality Assessment Program (NAWQA)
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Chemical compounds included in assessments

NAWQA assessments focus on chemical compounds that have well-established methods of investigation. It is not financially or technically feasible to assess all the contaminants in our Nation’s waters. In general, the NAWQA Program investigates those pesticides, nutrients, volatile organic compounds, and metals that have been or are currently used commonly in agricultural and urban areas across the Nation. Parameter codes are provided, which can be used to retrieve data from the NAWQA datawarehouse or the USGS NWISWeb

Well Features Pesticides
Field Parameters Volatile Organic Compounds
Major ions Trace Elements
Nutrients Radionuclides and stable isotopes


NAWQA Intranet (Internal Use Only)


 U.S. Department of the Interior, U.S. Geological Survey
 Contact for NAWQA:
 Maintainer: James Ulrich-
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 document URL- http://
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