Annual Testing of Backflow Prevention Assemblies

Annual testing of backflow prevention assemblies is required by Chapter 24 of the City of San Antonio's Plumbing and Fuel Gas Code, Chapter 34 of the City of San Antonio Code of Ordinances, and the SAWS Cross-Connection and Backflow Prevention Control Program.

SAWS will send out notification letters regarding the annual testing of external and internal backflow assemblies located at commercial and residential sites with alternative water use or on-site sewage facilities (OSSF). Residential reminders for annual backflow assembly testing for lawn irrigation systems are sent quarterly with bill notices.

Test and Maintenance forms should be submitted here.

Please note, only registered testers can submit Test and Maintenance Reports for SAWS customers.

A list of registered testers is available here.

TCEQ Licensed Customer Service Inspectors available here.

If a property owner fails to submit or deliver the annual report of backflow testing and inspection by the deadline, non-compliance fees will be assessed:

  • 1-3 assemblies - $79.50
  • 4-9 assemblies - $110
  • 10 or more - $168

Backflow Prevention Guidelines and Forms

Register as a SAWS
Backflow Tester

To register as a SAWS backflow tester, complete registration form and return with original signature, along with copies of the following:

  • Driver's License
  • Current BPAT License
  • Current Gauge Certification
  • Company Info: Name, Address & Phone Numbers

Registration forms must
be returned by mail at:

San Antonio Water System
c/o Backflow Prevention Section
PO BOX 2499
San Antonio, Texas 78298-2449

Or dropped off at:
San Antonio Water System
Backflow Prevention Section,
4th Floor
2800 U.S. Hwy. 281 North

The document files provided below are in Adobe PDF Format unless otherwise noted, and require the Adobe Acrobat Reader to be viewed. Use the link at the bottom of this page to get the Acrobat reader.

Cross-Connection Control and Backflow Prevention Program

List of Testers and Inspectors

Guidelines and Information


For questions or concerns regarding Backflow Prevention contact the:

SAWS Backflow Prevention Section
2800 U.S.Hwy 281 North
Customer Service Center, Tower II
San Antonio, Texas 78212
Office 210-233-2368   |