Pesticide Occurrence in the Upper Floridian Aquifer in the Dougherty Plain and Marianna Lowlands Districts, Southwestern Georgia and Adjacent Areas of Alabama and Florida
Hippe, Daniel J.
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In 1991, the U.S. Geological Survey (USGS) began full-scale implementation of the National Water-Quality Assessment,(NAWQA) program. The three major objectives of the program are to provide a consistent description of current water-quality conditions for a large part of the Nation's water resources; define long-term trends (or lack thereof); and identify, describe, and explain the major factors that affect observed water-quality conditions and trends. The NAWQA program includes investigations of hydrologic systems in 60 study units that include parts of most major river basins and aquifer systems in the United States. Study units range in size from 1,200 to about 65,000 square miles, and incorporate 60 to 70 percent of the Nation's water use and population served by public water-supply systems. The Apalachicola- Chattahoochee-Flint (ACF) River basin (Figure 1) was among the first 20 NAWQA study units selected for study under the full-scale implementation plan.