What is the scope of the National Assessment?
This national assessment of 55 volatile organic compounds (VOCs) in ground water focuses on VOC occurrence in aquifers that are used as an important supply of drinking water. The assessment of aquifers was designed as a large-scale resource assessment that provides a general characterization of water-quality conditions. A summary of results and conclusions have been outlined in an introductory section, Chapter 1, of the USGS Circular 1292.
