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In cooperation with the Texas Commission on Environmental Quality

Water-Level Altitudes in Wells Completed in the Northern Segment of the Edwards Aquifer, Travis, Williamson, and Bell Counties, Texas, March–June 2005

By Sachin D. Shah

U.S. Geological Survey
Data Series Report 125

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Well Selection and Data Collection

Water-Level Altitudes



1.   Map showing northern segment of the Edwards aquifer and sites of wells in which water levels measured, March–June 2005


1.   Well locations and water-level altitudes in the northern segment of the Edwards aquifer, March–June 2005


During March–June 2005, the U.S. Geological Survey, in cooperation with the Texas Commission on Environmental Quality (TCEQ), measured water levels in 80 Edwards aquifer wells in the outcrop of the northern segment of the aquifer in Travis, Williamson, and Bell Counties. Public-supply and private wells were selected in areas where outcrop water-level data were sparse. The altitude data can be used in the TCEQ Source Water Assessment and Protection program to help delineate zones of capture around sources of public water supply. Altitudes range from about 490 to about 935 feet above North American Vertical Datum of 1988.


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