The Edwards Aquifer is a vital underground water source located in central Texas, primarily supplying water to the city of San Antonio and surrounding areas. It is formed from limestone and is known for its high water yield, making it essential for drinking water, irrigation, and industrial use. The aquifer is recharged by rainfall and surface water, which filters through the soil and rock layers. This aquifer supports a unique ecosystem, including several endangered species such as the San Marcos Salamander and the Texas Blind Salamander. The Edwards Aquifer Authority manages its resources to ensure sustainable use and protect the environment. Conservation efforts are crucial to maintaining the aquifer's health and availability for future generations.