Backflow testing & repair in Palo Alto, CA
BackflowCare tests backflow prevention assemblies in Palo Alto (Santa Clara County) and files the results with City of Palo Alto Utilities. Installed backflow devices must be tested every year by a tester registered with the City, and the results submitted to the City. If a device fails, we make minor repairs and file the passing retest with Palo Alto Utilities.
- County
- Santa Clara County
- Water supplier
- City of Palo Alto Utilities
- Annual test
- Palo Alto Utilities: owner hires a certified tester
- Our price
- $199 per device ($25 off for new customers), or from $180/year on a plan
- ZIP codes
- 94301, 94303, 94304, 94306
What Palo Alto Utilities requires in Palo Alto
- Results must be submitted on the City of Palo Alto test form.
- The tester puts a serialized, colour-coded metal tag on each device, replaced every year.
- Any property with a well must have backflow protection on all its water services.
Source: Palo Alto Utilities backflow program (official page), checked October 17, 2026.
Backflow questions from Palo Alto property owners
Which water supplier serves Palo Alto?
City of Palo Alto Utilities supplies water in Palo Alto (ZIP 94301, 94303, 94304, 94306) and runs its backflow program.
Who tests backflow devices for Palo Alto Utilities customers in Palo Alto?
Installed backflow devices must be tested every year by a tester registered with the City, and the results submitted to the City.