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National Water-Quality Assessment Program

A National Assessment of Volatile Organic Compounds in Water Resources of the United States

(image) Figure: VOCs in the hydrologic cycle

Who we are

In 1993, the National Water-Quality Assessment (NAWQA) program began planning a a national synthesis effort focused on volatile organic compounds (VOCs). The project began in 1995 and is expected to continue through 2005. Three major topics are being studied in the National Synthesis:

  1. VOCs in ground water,
  2. VOCs in source water and drinking water
  3. VOCs in urban streams

Objective statements for these three topics are as follows:

  1. Determine the occurrence, status, distribution, major natural and anthropogenic factors, and probable sources of VOCs in the Nation's ground water
  2. Determine the occurrence and status of VOCs in aquifers and rivers that serve as public and domestic drinking water supplies
  3. Determine the occurrence, status, geographical distribution, and probable sources of VOCs in urban streams

What we do


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U.S. Department of the Interior, U.S. Geological Survey
NAWQA VOC National Synthesis
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