WELCOME TO THE GREATER EDWARDS AQUIFER ALLIANCE (GEAA)

We are a 501 (c)(3) nonprofit organization that promotes the effective broad-based advocacy for the protection and preservation of the Edwards Aquifer, its springs, watersheds, and the Texas Hill Country that sustains it.

The Edwards Aquifer Ecosystem of Central Texas is one of our most valuable, irreplaceable and endangered public treasures. The EPA recognizes it as a “Sole Source” water supply. It is the only source of drinking water for millions of Texans.

It is our right and duty to preserve and protect the Aquifer, its contributing Hill Country watersheds, its great springs, and its native biodiversity for the benefit of all residents and all future generations. As individuals and community-based organizations, we invite everyone who shares the desire to preserve the Edwards Aquifer to join with us.

The Greater Edwards Aquifer Alliance has originated a comprehensive program of science, advocacy, and public engagement aimed at protecting the quality and quantity of spring flows from the Edwards and Trinity aquifers. We are in need of support to fund key projects that are currently underway.

Join us at our 2026 Gala!

Celebrate water and ghostly San Antonio legends
on the banks of the Salado.

Join us for a spirited night of remembrance and revelry—protecting the waters that sustain life in South Central Texas. 
Saturday, November 7th, 2026   • 5:00-9:00 pm
Historic Victoria’s Black Swan Inn
1006 Holbrook Rd. | San Antonio, TX 78218
Sponsorship and tickets are available HERE.
Interested in donating an auction item? 
Our auction donation form is available HERE.

The Greater Edwards Aquifer Alliance (GEAA) is excited to launch Under Our Feet, a new interactive website designed to promote better understanding and protection of the Edwards and Trinity aquifers and, especially, the Edwards Aquifer Recharge Zone that supplies water for over 1.5 million Texans.

Realizing that very few people understand what a marvelous resource we have in our uniquely prolific karst aquifer, GEAA designed this site to encourage everyone to love this mysterious underground landscape as much as we do. “Under Our Feet” provides users with an overview of the Edwards and Trinity aquifers, karst groundwater systems, the Edwards watershed landscape, risks facing the aquifer systems, how to protect karst aquifers, and how to stay involved. Users will discover which zone of the Edwards Aquifer they live in, what that means in the groundwater cycle, what risks the aquifer is facing, and what actions they can take to protect the Edwards Aquifer. The site uses interactive maps, links, infographics, and photos to provide an engaging experience for all users.

Adults will be encouraged to “Take the Pledge” to adopt habits and practices that will protect the Edwards spring-fed streams and keep our water supply healthy. Children can “Adopt a Blind Salamander, one of the endangered species that lives under our feet and nowhere else.

Hays County commissioners reject Hays Commons development agreement

On Tuesday, the Hays County Commissioners Court voted 3-1 to deny a proposed development agreement tied to the controversial Hays Commons project, located almost entirely on the Edwards Aquifer recharge zone. The debate over Hays Commons has stretched on for years, drawing significant attention from residents in both Hays and Travis counties. Milestone has stated that if the agreement was denied, it could still pursue development under existing county rules. However, this vote is a much deserved victory by Hays

Read More »

HELP STOP HAYS COMMONS

ATTN: GEAA MEMBERS AND FRIENDS WE NEED YOUR HELP TO STOP HAYS COMMONS In April, GEAA member group Hays Residents for Land and Water Protection (HRFLWP) helped make a huge impact and it’s time to do it again! The public comments you all submitted resulted in the Hays Commons Development Agreement, variance request, and preliminary plan being tabled for public input. The Hays Commons Development Agreement is coming back to the Hays County Commissioners Court agenda on June 9th. Tell

Read More »

Barton Springs recharge zone: Still a bad place for freeways.

by: Annalisa Peace 4-20-26 We’ve never understood why highway authorities keep wanting to build freeways in one of the most precious and fragile places in the Austin area — the Barton Springs recharge zone. So, of course, GEAA is opposed to the huge multi-lane expansion of MoPac (running south from Enfield Road to Slaughter Lane) over the recharge zone. That’s why we’re urging you to join GEAA member groups in opposing the new MoPac South project by taking these two steps: Attend the

Read More »

Rocket Testing, Data Centers, and Great News from Local Elected Officials

Dear GEAA members and friends, As National Groundwater Week concludes, we have been inundated with threats and gifts to both the quality and quantity of our Edwards and Trinity groundwater. Here are some brief updates. It ain’t rocket science to worry that a rocket testing site on the Edwards Recharge Zone is bad news. It’s common sense. GEAA has been working with founding GEAA member group, the San Marcos River Foundation to support them in urging Texas State University to reconsider their plans to locate a rocket

Read More »

Hays County commissioners reject Hays Commons development agreement

On Tuesday, the Hays County Commissioners Court voted 3-1 to deny a proposed development agreement tied to the controversial Hays Commons project, located almost entirely on the Edwards Aquifer recharge zone. The debate over Hays Commons has stretched on for years, drawing significant attention from residents in both Hays and Travis counties. Milestone has stated that if the agreement was denied, it could still pursue development under existing county rules. However, this vote is a much deserved victory by Hays

Read More »

HELP STOP HAYS COMMONS

ATTN: GEAA MEMBERS AND FRIENDS WE NEED YOUR HELP TO STOP HAYS COMMONS In April, GEAA member group Hays Residents for Land and Water Protection (HRFLWP) helped make a huge impact and it’s time to do it again! The public comments you all submitted resulted in the Hays Commons Development Agreement, variance request, and preliminary plan being tabled for public input. The Hays Commons Development Agreement is coming back to the Hays County Commissioners Court agenda on June 9th. Tell

Read More »

Barton Springs recharge zone: Still a bad place for freeways.

by: Annalisa Peace 4-20-26 We’ve never understood why highway authorities keep wanting to build freeways in one of the most precious and fragile places in the Austin area — the Barton Springs recharge zone. So, of course, GEAA is opposed to the huge multi-lane expansion of MoPac (running south from Enfield Road to Slaughter Lane) over the recharge zone. That’s why we’re urging you to join GEAA member groups in opposing the new MoPac South project by taking these two steps: Attend the

Read More »

Rocket Testing, Data Centers, and Great News from Local Elected Officials

Dear GEAA members and friends, As National Groundwater Week concludes, we have been inundated with threats and gifts to both the quality and quantity of our Edwards and Trinity groundwater. Here are some brief updates. It ain’t rocket science to worry that a rocket testing site on the Edwards Recharge Zone is bad news. It’s common sense. GEAA has been working with founding GEAA member group, the San Marcos River Foundation to support them in urging Texas State University to reconsider their plans to locate a rocket

Read More »

GEAA Publications

GEAA Publications Wastewater Specific:

WE ARE HIRING: Development Director