Water Quality in South-Central Texas, Texas, 1996–98

By Peter W. Bush, Ann F. Ardis, Lynne Fahlquist, Patricia B. Ging, C. Evan Hornig, and Jennifer Lanning-Rush

U.S. GEOLOGICAL SURVEY CIRCULAR 1212

The full report is available in pdf.  Links to the pdf.

A contribution of the National Water-Quality Assessment (NAWQA) Program

• NATIONAL WATER-QUALITY ASSESSMENT PROGRAM
• SUMMARY OF MAJOR FINDINGS
• INTRODUCTION TO THE UPPER PART OF THE SOUTH-CENTRAL TEXAS STUDY UNIT
• MAJOR FINDINGS
  • Stream Quality Is Affected Most by Urban Activities
  • NATIONAL PERSPECTIVE—Trends in Water Quality Associated With Urban Development, as Reflected in Bottom Sediment of Lakes and Reservoirs, Are Not Unique to San Antonio
  • NATIONAL PERSPECTIVE—Nationally and Locally, Biological Community Status Is Related to Watershed Development
  • Edwards Aquifer Water Quality Remains Excellent
  • NATIONAL PERSPECTIVE—The Frequencies of Pesticide Detection in Ground Water Vary in Comparison With Those in Ground Water Nationally—Compounds Detected Were the Same
  • Trinity Aquifer Water Quality Is Mostly Unaffected by Human Activities
• STUDY UNIT DESIGN
• APPENDIX—WATER-QUALITY DATA FROM SOUTH-CENTRAL TEXAS IN A NATIONAL CONTEXT
• References
• A Coordinated Effort
• Glossary