Report 180 by H. B. Mendieta, U.S. Geological Survey | March 1974

• Report 180 - Reconnaissance of the Chemical Quality of Surface Waters of the Rio Grande Basin (pdf - 18.3MB)
• Figure 2 (pdf) Precipitation in the Texas Part of the Rio Grande Basin
• Figure 4 (jpeg) Geologic Map of the Rio Grande Basin in Texas and Mexico
• Figure 5 (jpeg) Irrigation in the Texas Part of the Rio Grande Basin
• Figure 6 (jpeg) Oil & Gas fields
• Figure 10 (pdf) Location of Data Collection Sites