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Backflow Prevention

In order to comply with State law, the City of Turlock is required to have an effective backflow prevention program to protect the public water supply from outside contamination.

City Municipal Code section 6-6 provides guidelines for such a program.
Turlock Municipal Code Section 6-6

The Municipal Services Department is committed to protecting the public potable water supply from contamination or pollution due to the backflow or back-siphonage of contaminates or pollutants through a water service connection. Backflow prevention assemblies provide the necessary protection from potential hazards.

Certified Tester List

If you are interested in applying for our Certified Tester List, please fill out the application using the link below and submit to municipalservices@turlock.ca.us. Test reports will not be accepted from those that are not on the Certified Tester List.

Additional Information

If you have any questions regarding backflow prevention, please call the Municipal Services Department at 209-668-5590, or email us at municipalservices@turlock.ca.us.


The documents below provide information on backflow prevention, our installation standard, and a listing of persons certified to check backflow prevention devices within the City of Turlock. These are being provided for your information, and additional copies are available at City Hall, in the Municipal Services Department, 156 South Broadway, Suite 270.

Guidelines for Backflow Installation and Replacements
Backflow Preventer Installation Diagram for a Standard Meter
Detailed Backflow Preventer Assembly
Fire Line Installation Diagram
Temporary Water Turn Off/ On
Backflow Tester Application 2024
2024 Certified Backflow Tester List

For more information or questions about backflow prevention, please contact:

Municipal Services
156 S. Broadway, Ste 270
Turlock, CA 95380
(209) 668-5590
Monday - Friday, 8AM - 5PM

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