The objectives of the National Water-Quality Assessment (NAWQA) program are to assess the status and trends of water-quality conditions throughout the Nation and to link the status and trends to an understanding of factors that affect water quality. The ARC/INFO* Geographic Information System has played a key role in achieving these goals and is being used as a tool for spatial-analysis applications in this multidisciplinary project, which includes physical, chemical, and biological studies. ARC/INFO was used to manage a large water-quality data base and to produce publication-quality graphics. This tool has been used for comprehensive analyses of data, efficient storage and retrieval of a large relational data base, and dilivery of study-unit findings to the water-resources community in a timely manner.
* The use of trade, product, industry, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
1 U.S. Geological Survey, Box 25046, MS 415, Denver Federal Center, Lakewood, CO 80225