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Edwards Aquifer Protection Program

Tools, guidance and other information regarding the Edwards Aquifer Protection Program which serves to regulate activities, including construction, that have the potential for polluting the Edwards Aquifer.

Anyone who plans to build on the recharge, transition, or contributing zones of the Edwards Aquifer must first have an application including construction plans approved by the TCEQ. Personnel from the Edwards Aquifer Protection Program review these plans. If a plan is approved, the site is monitored for compliance.

New InformationEdwards Aquifer Protection Program to host annual public hearing and opportunity to comment.

Some material posted here is in portable document format. (Help with PDF.)


The Edwards Aquifer regulated zones are present in eight Texas counties. The official boundaries were drawn on topographic base maps from the U.S. Geological Survey.

Technical Guidance

Our primary manual is Complying with the Edwards Aquifer RulesTechnical Guidance on Best Management Practices, RG-348,. There is a brief list of typographical errors in the manual. You may notify us of any other errors. We post an addendum that provides additional information that is approved for inclusion in the manual.

You may use our spreadsheet for permanent BMPs to calculate the required pollutant load reduction and sizing for permanent BMPs.

There are appendices to our manual that we call Optional Enhanced Measures for the Protection of Water Quality in the Edwards Aquifer. Last year we developed a supplemental guidance for quarry operations.

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About the Program

Find information about the history of state regulations to protect the aquifer, the latest rulemaking, and ways you can participate in the program.

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Contact the Appropriate Regional Office

For Projects in Hays, Travis and Williamson Counties:
Austin Regional Office
12100 Park 35 Circle
Austin, TX 78753

For Projects in Bexar, Comal, Kinney, Medina and Ulvade Counties:
TCEQ San Antonio Regional Office
14250 Judson Rd.
San Antonio, TX 78233-4480