Alameda County Backflow Testing Information

Backflow Prevention Resources

  • Approved Testers List (PDF) – View a list of local plumbing contractors who are certified backflow prevention device testers authorized and registered to perform work for ACWD customers.

  • Backflow Device Installation Drawings – View ACWD backflow prevention device standard installation drawings showing the required type and location of devices, including standard specification requirements.

  • Backflow Prevention Explained – Learn about ACWD’s program to prevent contamination of the water supply from backflow or cross connection of non-potable water sources.

  • Backflow Prevention Forms – Find required backflow prevention forms, including testing applications and testing reports.

  • Backflow Prevention Regulations – View regulations and ordinances that govern the ACWD backflow prevention program.