|Geology and Hydrology of the Edwards Aquifer|
|Movement of Water|
|Threats to Survival|
The Edwards Aquifer produces the most prolific springs in Texas and is the home of over 60 species that are endemic to the Edwards Aquifer eco-system and live no where else in the world. The high volume of water that passes through the aquifer and emerges at the Great Springs of Texas is the result of unique geology, which also creates isolated habitats for these unique species.
The waters that flows from the Edwards Aquifer and its Great Springs, in addition to supporting biodiversity in the Aquifer region, provide drinking water for over 1.5 million people, including the entire city of San Antonio. In addition, the Edwards Aquifer and the Great Springs provide essential fresh water flows for rivers that feed bays and estuaries along the Texas Coast, supporting fish, wildlife, and economic activity.