Geology

Texas Water Development Board Report 380, July 2011.

Information and map of major Aquifers in Texas.

This website contains information on the formation and hydrology of the aquifer, species found in the system, data charts and graphs, videos and images,

Created by the EPA, this site contains information various topics concerning water in the U.S. such as drinking water protection, contamination, and security.

Information regarding water planning, groundwater, surface water and conservation.

the USGS Water Resources "mission is to collect and disseminate reliable, impartial, and timely information that is needed to understand the Nation's water resources." This site provides information on water programs, data, resource publications, maps and GIS data.