The Official Website of the Edwards Aquifer Authority (EAA). The EAA is a groundwater district, mandated by the 1993 EAA Act. The EAA regulates the portion of the Balcones Fault Zone Edwards Aquifer – a jurisdictional area that provides water to over 2 million people, and covers more than 8,000 square miles across eight counties.
Phone
210-222-2204
