Storage Tanks

The EAA, in an effort to protect and preserve the region’s primary groundwater supply, regulates above ground storage tanks (ASTs) and underground storage tanks (USTs) located in, above, or on the Edwards Aquifer Recharge Zone and portions of the Contributing Zone. One of the many requirements includes the registration of all regulated storage tanks.  

The map link below assists you in determining if your facility is located on the Recharge Zone or on the regulated portion of the Contributing Zone of the Edwards Aquifer, which would require you to complete and submit the proper storage tank registration form.



To register your storage tank(s), please go to our online Regulated Substances Management System and create a user account. 

REGISTRATION FEES HAVE BEEN WAIVED FOR THE REMAINDER OF 2017 (EFFECTIVE 7/11/17) Payment options include online payment, personal check, cashier’s check, or money order made out to the Edwards Aquifer Authority. NO CASH PLEASE.  When using the online payment option, please attach the payment receipt to the submitted registration form.

On or after October 18, 2002, no person may install or have installed a regulated AST or UST system for the purpose of storing or otherwise containing regulated substances in, above, or on the recharge zone of the Edwards Aquifer, unless the installation is a result of an EAA approved Application for Major Modification (AMM). An AMM processing fee of $25.00 must accompany each application. Payment options include online payment, personal check, cashier’s check, or money order made out to the Edwards Aquifer Authority.   NO CASH PLEASE. When using the online payment option please attach the payment receipt to the submitted AMM.

Please note, the requirement to submit the above reference AMM is not required if:
  • A facility’s AST(s) have incorporated or will incorporate a form of secondary containment as part of an approved Texas Commission on Environmental Quality (Commission) AST Plan;
  •  A copy of the approved AST Plan is submitted to the EAA;
  • Documentation showing that the AST Plan has been approved by the Commission is submitted to the EAA; and
  • Documentation of any modification or exception associated with the plan have been submitted to the EAA.
The US Government Publishing Office’s website provides two extensive listings of regulated and hazardous substances.  Here are those links: LIST ONE      LIST TWO

For more information regarding AST and UST regulations, please see Chapter 713 (Water Quality) Subchapter G (Aboveground and Underground Storage Tanks) of the  EAA Rules.

If you have any questions related to this new rule, please contact Mr. Ben Urbanczyk, Recharge Zone Protection Supervisor, at (210) 222-2204 or (800) 292-1047.