Agency and Organization Sites

American Water Works Association
BexarMet Water District
Environmental Protection Agency
San Antonio Water System
South Central Texas Regional Water Planning Group
Texas Alliance of Groundwater Districts
Texas Commission on Environmental Quality
Texas Natural Resource Information System
Texas Water Conservation Association
Texas Water Development Board
US Geological Survey

Edwards Aquifer Sites

Barton Springs/Edwards Aquifer Conservation District
Bureau of Economic Geology - virtual aquifer
Edwards Aquifer Research and Data Center
University of Texas at Austin - Caves: A window into the Edwards Aquifer

Geology/Karst Sites

American Cave Conservation Association
Karst Waters Institute
National Speleological Society
Park Service Cave and Karst Program
Speleogenesis and Evolution of Karst Aquifers
The Geological Society of America
This Dynamic Earth: The Story of Plate Tectonics
USGS Education and Resources

Groundwater Sites

EPA Drinking Water for Kids
EPA Office of Ground Water and Drinking Water
Give Water A Hand
Groundwater Guardian
National Groundwater Association
Texas Parks and Wildlife Water Links
Texas Water Resources Institute
The Water Sourcebooks
USGS Water Resources, Education Resources
USGS Water Science for Schools
Water Environment Federation